config/checkstyle.xml

@@ -6,11 +6,6 @@
 	<module name="SuppressionFilter">
 		<property name="file" value="config/suppressions.xml"/>
 	</module>
-	<module name="SuppressWithPlainTextCommentFilter">
-		<property name="offCommentFormat" value="CHECKSTYLE\:OFF\:(\w+)"/>
-		<property name="onCommentFormat" value="CHECKSTYLE\:ON\:(\w+)"/>
-		<property name="checkFormat" value="$1"/>
-	</module>
 	<module name="Header">
 		<property name="headerFile" value="config/${checkstyleLicenseHeader}.txt"/>
 		<property name="ignoreLines" value="3"/>
@@ -66,14 +61,6 @@
 		<property name="format" value="^\s*//[^\s]"/>
 		<property name="message" value="Comment start ('//') followed by non-space character. You would not continue after a punctuation without a space, would you?"/>
 	</module>
-	<!-- Check for synchronized keyword on Manager's static
-	     getInstanceFor() method. Note that if XMPPConnection is every
-	     replaced with something else, then we need to change it here
-	     too. -->
-	<module name="RegexpSingleline">
-		<property name="format" value="^\s*public(?!.*synchronized).*getInstanceFor\(XMPPConnection.*$"/>
-		<property name="message" value="getInstanceFor() should be synchronized"/>
-	</module>
 	<module name="JavadocPackage"/>
 	<module name="TreeWalker">
 		<module name="SuppressionCommentFilter"/>
@@ -102,11 +89,6 @@
 			<property name="message" value="Usage of println"/>
 			<property name="ignoreComments" value="true"/>
 		</module>
-		<module name="RegexpSinglelineJava">
-			<property name="format" value="Boolean\.valueOf\("/>
-			<property name="message" value="Usage Boolean.valueOf(), consider using ParserUtils.parseXmlBoolean() instead (if you want to parse xs:boolean values)"/>
-			<property name="ignoreComments" value="true"/>
-		</module>
 		<module name="RegexpSinglelineJava">
 			<property name="format" value="^\t+"/>
 			<property name="message" value="Indent must not use tab characters. Use space instead."/>

resources/releasedocs/changelog.html

@@ -141,74 +141,6 @@ hr {
 
 	<div id="pageBody">
 
-<h2>4.3.3 -- <span style="font-weight: normal;">2019-03-14</span></h2>
-
-<h2>        Bug
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-856'>SMACK-856</a>] -         Smack fails under JDK 11 because com.sun.jndi.dns.DnsContextFactory is not inaccessible
-</li>
-</ul>
-
-<h2>        Improvement
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-858'>SMACK-858</a>] -         Dependency version specifier of jxmpp and MiniDNS include alpha/beta/... versions of the follow up version when Maven is used
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-859'>SMACK-859</a>] -         MultiUserChat enter() should reset the timeout of the collector waiting for the final self presence to prevent timeouts for large MUCs
-</li>
-</ul>
-
-<h2>4.3.2 -- <span style="font-weight: normal;">2019-02-22</span></h2>
-
-<h2>        Bug
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-842'>SMACK-842</a>] -         The RFC 3920 xml-not-well-formed error condition should be handled in stream error not a stanza error
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-843'>SMACK-843</a>] -         ManManager.pagePrevious() pages into the wrong direction
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-844'>SMACK-844</a>] -         Check if bounded unacknowledged stanzas queue is full before adding to it to avoid IllegalStateException
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-845'>SMACK-845</a>] -         Ensure that IQ response &#39;to&#39; address and ID are set correctly
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-846'>SMACK-846</a>] -         XMPPTCPConnection does not wait for stream features after authentication if compression is disabled
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-848'>SMACK-848</a>] -         Make MultiUserChat.leave() wait for response
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-850'>SMACK-850</a>] -         DeliveryReceiptManager should not send receipts with messages of type &#39;groupchat&#39;
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-855'>SMACK-855</a>] -         XMPPTCPConnection sometimes has two writer threads running
-</li>
-</ul>
-
-<h2>        Improvement
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-847'>SMACK-847</a>] -         Make TCP socket connection attempt interruptable
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-849'>SMACK-849</a>] -         Smack Local SOCKS5 Proxy thread should be marked as daemon thread
-</li>
-</ul>
-
-<h2>4.3.1 -- <span style="font-weight: normal;">2018-10-14</span></h2>
-	  
-<h2>        Bug
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-833'>SMACK-833</a>] -         XMLUtil.prettyFormatXml() throws on some Android devices
-</li>
-</ul>
-                    
-<h2>        Improvement
-</h2>
-<ul>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-829'>SMACK-829</a>] -         Disconnect BOSH client on shutdown
-</li>
-<li>[<a href='https://issues.igniterealtime.org/browse/SMACK-838'>SMACK-838</a>] -         FormField.getFirstValue() throws IndexOutOfBoundsException if there are no values
-</li>
-</ul>
-
 <h2>4.3.0 -- <span style="font-weight: normal;">2018-08-02</span></h2>
 
 <h2>        Bug

smack-bosh/build.gradle

@@ -4,7 +4,5 @@ This API is considered beta quality."""
 
 dependencies {
 	compile project(':smack-core')
-	// See https://issues.igniterealtime.org/browse/SMACK-858 and
-	// comment in version.gradle why the specify the version this way.
-	compile 'org.igniterealtime.jbosh:jbosh:[0.9.1,0.9.999]'
+	compile 'org.igniterealtime.jbosh:jbosh:[0.9,0.10)'
 }

smack-bosh/src/main/java/org/jivesoftware/smack/bosh/BOSHConfiguration.java

@@ -19,8 +19,6 @@ package org.jivesoftware.smack.bosh;
 
 import java.net.URI;
 import java.net.URISyntaxException;
-import java.util.HashMap;
-import java.util.Map;
 
 import org.jivesoftware.smack.ConnectionConfiguration;
 import org.jivesoftware.smack.proxy.ProxyInfo;
@@ -36,7 +34,6 @@ public final class BOSHConfiguration extends ConnectionConfiguration {
 
     private final boolean https;
     private final String file;
-    private Map<String, String> httpHeaders;
 
     private BOSHConfiguration(Builder builder) {
         super(builder);
@@ -52,7 +49,6 @@ public final class BOSHConfiguration extends ConnectionConfiguration {
         } else {
             file = builder.file;
         }
-        httpHeaders = builder.httpHeaders;
     }
 
     public boolean isProxyEnabled() {
@@ -80,10 +76,6 @@ public final class BOSHConfiguration extends ConnectionConfiguration {
         return new URI((https ? "https://" : "http://") + this.host + ":" + this.port + file);
     }
 
-    public Map<String, String> getHttpHeaders() {
-        return httpHeaders;
-    }
-
     public static Builder builder() {
         return new Builder();
     }
@@ -91,7 +83,6 @@ public final class BOSHConfiguration extends ConnectionConfiguration {
     public static final class Builder extends ConnectionConfiguration.Builder<Builder, BOSHConfiguration> {
         private boolean https;
         private String file;
-        private Map<String, String> httpHeaders = new HashMap<>();
 
         private Builder() {
         }
@@ -110,11 +101,6 @@ public final class BOSHConfiguration extends ConnectionConfiguration {
             return this;
         }
 
-        public Builder addHttpHeader(String name, String value) {
-            httpHeaders.put(name, value);
-            return this;
-        }
-
         @Override
         public BOSHConfiguration build() {
             return new BOSHConfiguration(this);

smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java

@@ -22,7 +22,6 @@ import java.io.PipedReader;
 import java.io.PipedWriter;
 import java.io.StringReader;
 import java.io.Writer;
-import java.util.Map;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -157,9 +156,6 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
             if (config.isProxyEnabled()) {
                 cfgBuilder.setProxy(config.getProxyAddress(), config.getProxyPort());
             }
-            for (Map.Entry<String, String> h : config.getHttpHeaders().entrySet()) {
-                cfgBuilder.addHttpHeader(h.getKey(), h.getValue());
-            }
             client = BOSHClient.create(cfgBuilder.build());
 
             client.addBOSHClientConnListener(new BOSHConnectionListener());
@@ -267,11 +263,6 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
             client = null;
         }
 
-        instantShutdown();
-    }
-
-    @Override
-    public void instantShutdown() {
         setWasAuthenticated();
         sessionID = null;
         done = true;

smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java

@@ -26,7 +26,6 @@ import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Queue;
 import java.util.Set;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.CopyOnWriteArraySet;
@@ -236,7 +235,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      * stanza is send by the server. This is set to true once the last feature stanza has been
      * parsed.
      */
-    protected final SynchronizationPoint<SmackException> lastFeaturesReceived = new SynchronizationPoint<>(
+    protected final SynchronizationPoint<Exception> lastFeaturesReceived = new SynchronizationPoint<Exception>(
                     AbstractXMPPConnection.this, "last stream features received from server");
 
     /**
@@ -298,18 +297,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
     });
 
-    protected static final AsyncButOrdered<AbstractXMPPConnection> ASYNC_BUT_ORDERED = new AsyncButOrdered<>();
-
-    /**
-     * An executor which uses {@link #asyncGoLimited(Runnable)} to limit the number of asynchronously processed runnables
-     * per connection.
-     */
-    private final Executor limitedExcutor = new Executor() {
-        @Override
-        public void execute(Runnable runnable) {
-            asyncGoLimited(runnable);
-        }
-    };
+    private static final AsyncButOrdered<AbstractXMPPConnection> ASYNC_BUT_ORDERED = new AsyncButOrdered<>();
 
     /**
      * The used host to establish the connection to
@@ -326,9 +314,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      */
     protected boolean authenticated = false;
 
-    // TODO: Migrate to ZonedDateTime once Smack's minimum required Android SDK level is 26 (8.0, Oreo) or higher.
-    protected long authenticatedConnectionInitiallyEstablishedTimestamp;
-
     /**
      * Flag that indicates if the user was authenticated with the server when the connection
      * to the server was closed (abruptly or not).
@@ -396,12 +381,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     @Override
     public abstract boolean isUsingCompression();
 
-    protected void initState() {
-        saslFeatureReceived.init();
-        lastFeaturesReceived.init();
-        tlsHandled.init();
-    }
-
     /**
      * Establishes a connection to the XMPP server. It basically
      * creates and maintains a connection to the server.
@@ -420,23 +399,21 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         throwAlreadyConnectedExceptionIfAppropriate();
 
         // Reset the connection state
-        initState();
         saslAuthentication.init();
+        saslFeatureReceived.init();
+        lastFeaturesReceived.init();
+        tlsHandled.init();
         streamId = null;
 
-        try {
-            // Perform the actual connection to the XMPP service
-            connectInternal();
+        // Perform the actual connection to the XMPP service
+        connectInternal();
 
-            // If TLS is required but the server doesn't offer it, disconnect
-            // from the server and throw an error. First check if we've already negotiated TLS
-            // and are secure, however (features get parsed a second time after TLS is established).
-            if (!isSecureConnection() && getConfiguration().getSecurityMode() == SecurityMode.required) {
-                throw new SecurityRequiredByClientException();
-            }
-        } catch (SmackException | IOException | XMPPException | InterruptedException e) {
-            instantShutdown();
-            throw e;
+        // If TLS is required but the server doesn't offer it, disconnect
+        // from the server and throw an error. First check if we've already negotiated TLS
+        // and are secure, however (features get parsed a second time after TLS is established).
+        if (!isSecureConnection() && getConfiguration().getSecurityMode() == SecurityMode.required) {
+            shutdown();
+            throw new SecurityRequiredByClientException();
         }
 
         // Make note of the fact that we're now connected.
@@ -573,7 +550,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         // - the servers last features stanza has been parsed
         // - the timeout occurs
         LOGGER.finer("Waiting for last features to be received before continuing with resource binding");
-        lastFeaturesReceived.checkIfSuccessOrWaitOrThrow();
+        lastFeaturesReceived.checkIfSuccessOrWait();
 
 
         if (!hasFeature(Bind.ELEMENT, Bind.NAMESPACE)) {
@@ -605,9 +582,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     }
 
     protected void afterSuccessfulLogin(final boolean resumed) throws NotConnectedException, InterruptedException {
-        if (!resumed) {
-            authenticatedConnectionInitiallyEstablishedTimestamp = System.currentTimeMillis();
-        }
         // Indicate that we're now authenticated.
         this.authenticated = true;
 
@@ -789,11 +763,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      */
     protected abstract void shutdown();
 
-    /**
-     * Performs an unclean disconnect and shutdown of the connection. Does not send a closing stream stanza.
-     */
-    public abstract void instantShutdown();
-
     @Override
     public void addConnectionListener(ConnectionListener connectionListener) {
         if (connectionListener == null) {
@@ -1128,7 +1097,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         if (packet instanceof IQ) {
             final IQ iq = (IQ) packet;
             if (iq.isRequestIQ()) {
-                final IQ iqRequest = iq;
                 final String key = XmppStringUtils.generateKey(iq.getChildElementName(), iq.getChildElementNamespace());
                 IQRequestHandler iqRequestHandler;
                 final IQ.Type type = iq.getType();
@@ -1178,7 +1146,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
                         executorService = ASYNC_BUT_ORDERED.asExecutorFor(this);
                         break;
                     case async:
-                        executorService = limitedExcutor;
+                        executorService = CACHED_EXECUTOR_SERVICE;
                         break;
                     }
                     final IQRequestHandler finalIqRequestHandler = iqRequestHandler;
@@ -1194,11 +1162,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
                                 // e.g. to avoid presence leaks.
                                 return;
                             }
-
-                            assert (response.getType() == IQ.Type.result || response.getType() == IQ.Type.error);
-
-                            response.setTo(iqRequest.getFrom());
-                            response.setStanzaId(iqRequest.getStanzaId());
                             try {
                                 sendStanza(response);
                             }
@@ -1228,7 +1191,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
 
         for (final StanzaListener listener : listenersToNotify) {
-            asyncGoLimited(new Runnable() {
+            asyncGo(new Runnable() {
                 @Override
                 public void run() {
                     try {
@@ -1747,18 +1710,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         return lastStanzaReceived;
     }
 
-    /**
-     * Get the timestamp when the connection was the first time authenticated, i.e., when the first successful login was
-     * performed. Note that this value is not reset on disconnect, so it represents the timestamp from the last
-     * authenticated connection. The value is also not reset on stream resumption.
-     *
-     * @return the timestamp or {@code null}.
-     * @since 4.3.3
-     */
-    public final long getAuthenticatedConnectionInitiallyEstablishedTimestamp() {
-        return authenticatedConnectionInitiallyEstablishedTimestamp;
-    }
-
     /**
      * Install a parsing exception callback, which will be invoked once an exception is encountered while parsing a
      * stanza.
@@ -1785,75 +1736,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         return getClass().getSimpleName() + '[' + localEndpointString + "] (" + getConnectionCounter() + ')';
     }
 
-    /**
-     * A queue of deferred runnables that where not executed immediately because {@link #currentAsyncRunnables} reached
-     * {@link #maxAsyncRunnables}. Note that we use a {@code LinkedList} in order to avoid space blowups in case the
-     * list ever becomes very big and shrinks again.
-     */
-    private final Queue<Runnable> deferredAsyncRunnables = new LinkedList<>();
-
-    private int deferredAsyncRunnablesCount;
-
-    private int deferredAsyncRunnablesCountPrevious;
-
-    private int maxAsyncRunnables = SmackConfiguration.getDefaultConcurrencyLevelLimit();
-
-    private int currentAsyncRunnables;
-
-    protected void asyncGoLimited(final Runnable runnable) {
-        Runnable wrappedRunnable = new Runnable() {
-            @Override
-            public void run() {
-                runnable.run();
-
-                synchronized (deferredAsyncRunnables) {
-                    Runnable defferredRunnable = deferredAsyncRunnables.poll();
-                    if (defferredRunnable == null) {
-                        currentAsyncRunnables--;
-                    } else {
-                        deferredAsyncRunnablesCount--;
-                        asyncGo(defferredRunnable);
-                    }
-                }
-            }
-        };
-
-        synchronized (deferredAsyncRunnables) {
-            if (currentAsyncRunnables < maxAsyncRunnables) {
-                currentAsyncRunnables++;
-                asyncGo(wrappedRunnable);
-            } else {
-                deferredAsyncRunnablesCount++;
-                deferredAsyncRunnables.add(wrappedRunnable);
-            }
-
-            final int HIGH_WATERMARK = 100;
-            final int INFORM_WATERMARK = 20;
-
-            final int deferredAsyncRunnablesCount = this.deferredAsyncRunnablesCount;
-
-            if (deferredAsyncRunnablesCount >= HIGH_WATERMARK
-                    && deferredAsyncRunnablesCountPrevious < HIGH_WATERMARK) {
-                LOGGER.log(Level.WARNING, "High watermark of " + HIGH_WATERMARK + " simultaneous executing runnables reached");
-            } else if (deferredAsyncRunnablesCount >= INFORM_WATERMARK
-                    && deferredAsyncRunnablesCountPrevious < INFORM_WATERMARK) {
-                LOGGER.log(Level.INFO, INFORM_WATERMARK + " simultaneous executing runnables reached");
-            }
-
-            deferredAsyncRunnablesCountPrevious = deferredAsyncRunnablesCount;
-        }
-    }
-
-    public void setMaxAsyncOperations(int maxAsyncOperations) {
-        if (maxAsyncOperations < 1) {
-            throw new IllegalArgumentException("Max async operations must be greater than 0");
-        }
-
-        synchronized (deferredAsyncRunnables) {
-            maxAsyncRunnables = maxAsyncOperations;
-        }
-    }
-
     protected static void asyncGo(Runnable runnable) {
         CACHED_EXECUTOR_SERVICE.execute(runnable);
     }

smack-core/src/main/java/org/jivesoftware/smack/AsyncButOrdered.java

@@ -55,16 +55,6 @@ public class AsyncButOrdered<K> {
 
     private final Map<K, Boolean> threadActiveMap = new WeakHashMap<>();
 
-    private final Executor executor;
-
-    public AsyncButOrdered() {
-        this(null);
-    }
-
-    public AsyncButOrdered(Executor executor) {
-        this.executor = executor;
-    }
-
     /**
      * Invoke the given {@link Runnable} asynchronous but ordered in respect to the given key.
      *
@@ -96,11 +86,7 @@ public class AsyncButOrdered<K> {
             if (newHandler) {
                 Handler handler = new Handler(keyQueue, key);
                 threadActiveMap.put(key, true);
-                if (executor == null) {
-                    AbstractXMPPConnection.asyncGo(handler);
-                } else {
-                    executor.execute(handler);
-                }
+                AbstractXMPPConnection.asyncGo(handler);
             }
         }
 

smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java

@@ -18,7 +18,6 @@
 package org.jivesoftware.smack;
 
 import java.net.InetAddress;
-import java.net.UnknownHostException;
 import java.security.KeyStore;
 import java.util.Arrays;
 import java.util.Collection;
@@ -46,7 +45,6 @@ import org.jxmpp.jid.impl.JidCreate;
 import org.jxmpp.jid.parts.Resourcepart;
 import org.jxmpp.stringprep.XmppStringprepException;
 import org.minidns.dnsname.DnsName;
-import org.minidns.util.InetAddressUtil;
 
 /**
  * Configuration to use while establishing the connection to the server.
@@ -173,14 +171,6 @@ public abstract class ConnectionConfiguration {
 
     }
 
-    DnsName getHost() {
-        return host;
-    }
-
-    InetAddress getHostAddress() {
-        return hostAddress;
-    }
-
     /**
      * Returns the server name of the target server.
      *
@@ -652,33 +642,6 @@ public abstract class ConnectionConfiguration {
             return getThis();
         }
 
-        /**
-         * Set the host to connect to by either its fully qualified domain name (FQDN) or its IP.
-         *
-         * @param fqdnOrIp a CharSequence either representing the FQDN or the IP of the host.
-         * @return a reference to this builder.
-         * @see #setHost(DnsName)
-         * @see #setHostAddress(InetAddress)
-         * @since 4.3.2
-         */
-        public B setHostAddressByNameOrIp(CharSequence fqdnOrIp) {
-            String fqdnOrIpString = fqdnOrIp.toString();
-            if (InetAddressUtil.isIpAddress(fqdnOrIp)) {
-                InetAddress hostInetAddress;
-                try {
-                    hostInetAddress = InetAddress.getByName(fqdnOrIpString);
-                }
-                catch (UnknownHostException e) {
-                    // Should never happen.
-                    throw new AssertionError(e);
-                }
-                setHostAddress(hostInetAddress);
-            } else {
-                setHost(fqdnOrIpString);
-            }
-            return getThis();
-        }
-
         public B setPort(int port) {
             if (port < 0 || port > 65535) {
                 throw new IllegalArgumentException(

smack-core/src/main/java/org/jivesoftware/smack/SmackConfiguration.java

@@ -365,19 +365,4 @@ public final class SmackConfiguration {
     public static void setUnknownIqRequestReplyMode(UnknownIqRequestReplyMode unknownIqRequestReplyMode) {
         SmackConfiguration.unknownIqRequestReplyMode = Objects.requireNonNull(unknownIqRequestReplyMode, "Must set mode");
     }
-
-    private static final int defaultConcurrencyLevelLimit;
-
-    static {
-        int availableProcessors = Runtime.getRuntime().availableProcessors();
-        if (availableProcessors < 8) {
-            defaultConcurrencyLevelLimit = 8;
-        } else {
-            defaultConcurrencyLevelLimit = (int) (availableProcessors * 1.1);
-        }
-    }
-
-    public static int getDefaultConcurrencyLevelLimit() {
-        return defaultConcurrencyLevelLimit;
-    }
 }

smack-core/src/main/java/org/jivesoftware/smack/SmackException.java

@@ -93,24 +93,13 @@ public class SmackException extends Exception {
             return new NoResponseException(sb.toString());
         }
 
-        @Deprecated
-        // TODO: Remove in Smack 4.4.
         public static NoResponseException newWith(XMPPConnection connection,
                         StanzaCollector collector) {
             return newWith(connection, collector.getStanzaFilter());
         }
 
-        public static NoResponseException newWith(long timeout,
-                        StanzaCollector collector) {
-            return newWith(timeout, collector.getStanzaFilter());
-        }
-
         public static NoResponseException newWith(XMPPConnection connection, StanzaFilter filter) {
-            return newWith(connection.getReplyTimeout(), filter);
-        }
-
-        public static NoResponseException newWith(long timeout, StanzaFilter filter) {
-            final StringBuilder sb = getWaitingFor(timeout);
+            final StringBuilder sb = getWaitingFor(connection);
             sb.append(" Waited for response using: ");
             if (filter != null) {
                 sb.append(filter.toString());
@@ -123,10 +112,7 @@ public class SmackException extends Exception {
         }
 
         private static StringBuilder getWaitingFor(XMPPConnection connection) {
-            return getWaitingFor(connection.getReplyTimeout());
-        }
-
-        private static StringBuilder getWaitingFor(final long replyTimeout) {
+            final long replyTimeout = connection.getReplyTimeout();
             final StringBuilder sb = new StringBuilder(256);
             sb.append("No response received within reply timeout. Timeout was "
                             + replyTimeout + "ms (~"
@@ -348,16 +334,4 @@ public class SmackException extends Exception {
             super("Resource binding was not offered by server");
         }
     }
-
-    public static class SmackWrappedException extends SmackException {
-
-        /**
-         *
-         */
-        private static final long serialVersionUID = 1L;
-
-        public SmackWrappedException(Exception exception) {
-            super(exception);
-        }
-    }
 }

smack-core/src/main/java/org/jivesoftware/smack/SmackFuture.java

@@ -16,18 +16,11 @@
  */
 package org.jivesoftware.smack;
 
-import java.io.IOException;
-import java.net.Socket;
-import java.net.SocketAddress;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import javax.net.SocketFactory;
 
 import org.jivesoftware.smack.packet.Stanza;
 import org.jivesoftware.smack.util.CallbackRecipient;
@@ -36,8 +29,6 @@ import org.jivesoftware.smack.util.SuccessCallback;
 
 public abstract class SmackFuture<V, E extends Exception> implements Future<V>, CallbackRecipient<V, E> {
 
-    private static final Logger LOGGER = Logger.getLogger(SmackFuture.class.getName());
-
     private boolean cancelled;
 
     protected V result;
@@ -103,7 +94,7 @@ public abstract class SmackFuture<V, E extends Exception> implements Future<V>,
     @Override
     public final synchronized V get() throws InterruptedException, ExecutionException {
         while (result == null && exception == null && !cancelled) {
-            futureWait();
+            wait();
         }
 
         return getOrThrowExecutionException();
@@ -111,7 +102,7 @@ public abstract class SmackFuture<V, E extends Exception> implements Future<V>,
 
     public final synchronized V getOrThrow() throws E, InterruptedException {
         while (result == null && exception == null && !cancelled) {
-            futureWait();
+            wait();
         }
 
         if (exception != null) {
@@ -133,7 +124,7 @@ public abstract class SmackFuture<V, E extends Exception> implements Future<V>,
         while (result != null && exception != null) {
             final long waitTimeRemaining = deadline - System.currentTimeMillis();
             if (waitTimeRemaining > 0) {
-                futureWait(waitTimeRemaining);
+                wait(waitTimeRemaining);
             }
         }
 
@@ -171,15 +162,6 @@ public abstract class SmackFuture<V, E extends Exception> implements Future<V>,
         }
     }
 
-    protected final void futureWait() throws InterruptedException {
-        futureWait(0);
-    }
-
-    @SuppressWarnings("WaitNotInLoop")
-    protected void futureWait(long timeout) throws InterruptedException {
-        wait(timeout);
-    }
-
     public static class InternalSmackFuture<V, E extends Exception> extends SmackFuture<V, E> {
         public final synchronized void setResult(V result) {
             this.result = result;
@@ -196,64 +178,6 @@ public abstract class SmackFuture<V, E extends Exception> implements Future<V>,
         }
     }
 
-    public static class SocketFuture extends InternalSmackFuture<Socket, IOException> {
-        private final Socket socket;
-
-        private final Object wasInterruptedLock = new Object();
-
-        private boolean wasInterrupted;
-
-        public SocketFuture(SocketFactory socketFactory) throws IOException {
-            socket = socketFactory.createSocket();
-        }
-
-        @Override
-        protected void futureWait(long timeout) throws InterruptedException {
-            try {
-                super.futureWait(timeout);
-            } catch (InterruptedException interruptedException) {
-                synchronized (wasInterruptedLock) {
-                    wasInterrupted = true;
-                    if (!socket.isClosed()) {
-                        closeSocket();
-                    }
-                }
-                throw interruptedException;
-            }
-        }
-
-        public void connectAsync(final SocketAddress socketAddress, final int timeout) {
-            AbstractXMPPConnection.asyncGo(new Runnable() {
-                @Override
-                public void run() {
-                    try {
-                        socket.connect(socketAddress, timeout);
-                    }
-                    catch (IOException e) {
-                        setException(e);
-                        return;
-                    }
-                    synchronized (wasInterruptedLock) {
-                        if (wasInterrupted) {
-                            closeSocket();
-                            return;
-                        }
-                    }
-                    setResult(socket);
-                }
-            });
-        }
-
-        private void closeSocket() {
-            try {
-                socket.close();
-            }
-            catch (IOException ioException) {
-                LOGGER.log(Level.WARNING, "Could not close socket", ioException);
-            }
-        }
-    }
-
     public abstract static class InternalProcessStanzaSmackFuture<V, E extends Exception> extends InternalSmackFuture<V, E>
                     implements StanzaListener, ExceptionCallback<E> {
 

smack-core/src/main/java/org/jivesoftware/smack/StanzaCollector.java

@@ -262,7 +262,7 @@ public class StanzaCollector {
             if (!connection.isConnected()) {
                 throw new NotConnectedException(connection, packetFilter);
             }
-            throw NoResponseException.newWith(timeout, this);
+            throw NoResponseException.newWith(connection, this);
         }
 
         XMPPErrorException.ifHasErrorThenThrow(result);

smack-core/src/main/java/org/jivesoftware/smack/SynchronizationPoint.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2014-2019 Florian Schmaus
+ * Copyright © 2014-2015 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import java.util.concurrent.locks.Lock;
 
 import org.jivesoftware.smack.SmackException.NoResponseException;
 import org.jivesoftware.smack.SmackException.NotConnectedException;
-import org.jivesoftware.smack.SmackException.SmackWrappedException;
 import org.jivesoftware.smack.packet.Nonza;
 import org.jivesoftware.smack.packet.Stanza;
 import org.jivesoftware.smack.packet.TopLevelStreamElement;
@@ -38,7 +37,6 @@ public class SynchronizationPoint<E extends Exception> {
     // same memory synchronization effects as synchronization block enter and leave.
     private State state;
     private E failureException;
-    private SmackWrappedException smackWrappedExcpetion;
 
     /**
      * Construct a new synchronization point for the given connection.
@@ -61,7 +59,6 @@ public class SynchronizationPoint<E extends Exception> {
         connectionLock.lock();
         state = State.Initial;
         failureException = null;
-        smackWrappedExcpetion = null;
         connectionLock.unlock();
     }
 
@@ -74,7 +71,7 @@ public class SynchronizationPoint<E extends Exception> {
      * @throws InterruptedException if the connection is interrupted.
      * @return <code>null</code> if synchronization point was successful, or the failure Exception.
      */
-    public Exception sendAndWaitForResponse(TopLevelStreamElement request) throws NoResponseException,
+    public E sendAndWaitForResponse(TopLevelStreamElement request) throws NoResponseException,
                     NotConnectedException, InterruptedException {
         assert (state == State.Initial);
         connectionLock.lock();
@@ -106,14 +103,15 @@ public class SynchronizationPoint<E extends Exception> {
      * @throws NoResponseException if no response was received.
      * @throws NotConnectedException if the connection is not connected.
      * @throws InterruptedException if the connection is interrupted.
-     * @throws SmackWrappedException in case of a wrapped exception;
      */
     public void sendAndWaitForResponseOrThrow(Nonza request) throws E, NoResponseException,
-                    NotConnectedException, InterruptedException, SmackWrappedException {
+                    NotConnectedException, InterruptedException {
         sendAndWaitForResponse(request);
         switch (state) {
         case Failure:
-            throwException();
+            if (failureException != null) {
+                throw failureException;
+            }
             break;
         default:
             // Success, do nothing
@@ -125,12 +123,11 @@ public class SynchronizationPoint<E extends Exception> {
      * @throws NoResponseException if there was no response marking the synchronization point as success or failed.
      * @throws E if there was a failure
      * @throws InterruptedException if the connection is interrupted.
-     * @throws SmackWrappedException in case of a wrapped exception;
      */
-    public void checkIfSuccessOrWaitOrThrow() throws NoResponseException, E, InterruptedException, SmackWrappedException {
+    public void checkIfSuccessOrWaitOrThrow() throws NoResponseException, E, InterruptedException {
         checkIfSuccessOrWait();
         if (state == State.Failure) {
-            throwException();
+            throw failureException;
         }
     }
 
@@ -140,7 +137,7 @@ public class SynchronizationPoint<E extends Exception> {
      * @throws InterruptedException
      * @return <code>null</code> if synchronization point was successful, or the failure Exception.
      */
-    public Exception checkIfSuccessOrWait() throws NoResponseException, InterruptedException {
+    public E checkIfSuccessOrWait() throws NoResponseException, InterruptedException {
         connectionLock.lock();
         try {
             switch (state) {
@@ -148,7 +145,7 @@ public class SynchronizationPoint<E extends Exception> {
             case Success:
                 return null;
             case Failure:
-                return getException();
+                return failureException;
             default:
                 // Do nothing
                 break;
@@ -201,24 +198,6 @@ public class SynchronizationPoint<E extends Exception> {
         }
     }
 
-    /**
-     * Report this synchronization point as failed because of the given exception. The {@code failureException} must be set.
-     *
-     * @param exception the exception causing this synchronization point to fail.
-     */
-    public void reportGenericFailure(SmackWrappedException exception) {
-        assert exception != null;
-        connectionLock.lock();
-        try {
-            state = State.Failure;
-            this.smackWrappedExcpetion = exception;
-            condition.signalAll();
-        }
-        finally {
-            connectionLock.unlock();
-        }
-    }
-
     /**
      * Check if this synchronization point was successful.
      *
@@ -234,16 +213,6 @@ public class SynchronizationPoint<E extends Exception> {
         }
     }
 
-    public boolean isNotInInitialState() {
-        connectionLock.lock();
-        try {
-            return state != State.Initial;
-        }
-        finally {
-            connectionLock.unlock();
-        }
-    }
-
     /**
      * Check if this synchronization point has its request already sent.
      *
@@ -287,20 +256,6 @@ public class SynchronizationPoint<E extends Exception> {
         }
     }
 
-    private Exception getException() {
-        if (failureException != null) {
-            return failureException;
-        }
-        return smackWrappedExcpetion;
-    }
-
-    private void throwException() throws E, SmackWrappedException {
-        if (failureException != null) {
-            throw failureException;
-        }
-        throw smackWrappedExcpetion;
-    }
-
     /**
      * Check for a response and throw a {@link NoResponseException} if there was none.
      * <p>
@@ -309,7 +264,7 @@ public class SynchronizationPoint<E extends Exception> {
      * @return <code>true</code> if synchronization point was successful, <code>false</code> on failure.
      * @throws NoResponseException
      */
-    private Exception checkForResponse() throws NoResponseException {
+    private E checkForResponse() throws NoResponseException {
         switch (state) {
         case Initial:
         case NoResponse:
@@ -318,7 +273,7 @@ public class SynchronizationPoint<E extends Exception> {
         case Success:
             return null;
         case Failure:
-            return getException();
+            return failureException;
         default:
             throw new AssertionError("Unknown state " + state);
         }

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaError.java

@@ -198,12 +198,6 @@ public class StanzaError extends AbstractError implements ExtensionElement {
     public String toString() {
         StringBuilder sb = new StringBuilder("XMPPError: ");
         sb.append(condition.toString()).append(" - ").append(type.toString());
-
-        String descriptiveText = getDescriptiveText();
-        if (descriptiveText != null) {
-            sb.append(" [").append(descriptiveText).append(']');
-        }
-
         if (errorGenerator != null) {
             sb.append(". Generated by ").append(errorGenerator);
         }
@@ -391,6 +385,11 @@ public class StanzaError extends AbstractError implements ExtensionElement {
         }
 
         public static Condition fromString(String string) {
+            // Backwards compatibility for older implementations still using RFC 3920. RFC 6120
+            // changed 'xml-not-well-formed' to 'not-well-formed'.
+            if ("xml-not-well-formed".equals(string)) {
+                string = "not-well-formed";
+            }
             string = string.replace('-', '_');
             Condition condition = null;
             try {

smack-core/src/main/java/org/jivesoftware/smack/packet/StreamError.java

@@ -186,11 +186,6 @@ public class StreamError extends AbstractError implements Nonza {
         }
 
         public static Condition fromString(String string) {
-            // Backwards compatibility for older implementations still using RFC 3920. RFC 6120
-            // changed 'xml-not-well-formed' to 'not-well-formed'.
-            if ("xml-not-well-formed".equals(string)) {
-                string = "not-well-formed";
-            }
             string = string.replace('-', '_');
             Condition condition = null;
             try {

smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java

@@ -123,9 +123,7 @@ public class IntrospectionProvider{
         case "java.lang.String":
             return value;
         case "boolean":
-            // CHECKSTYLE:OFF
             return Boolean.valueOf(value);
-            // CHECKSTYLE:ON
         case "int":
             return Integer.valueOf(value);
         case "long":

smack-core/src/main/java/org/jivesoftware/smack/proxy/HTTPProxySocketConnection.java

@@ -58,7 +58,7 @@ class HTTPProxySocketConnection implements ProxySocketConnection {
             proxyLine = "\r\nProxy-Authorization: Basic " + Base64.encode(username + ":" + password);
         }
         socket.getOutputStream().write((hostport + " HTTP/1.1\r\nHost: "
-            + host + ":" + port + proxyLine + "\r\n\r\n").getBytes("UTF-8"));
+            + hostport + proxyLine + "\r\n\r\n").getBytes("UTF-8"));
 
         InputStream in = socket.getInputStream();
         StringBuilder got = new StringBuilder(100);
@@ -115,8 +115,7 @@ class HTTPProxySocketConnection implements ProxySocketConnection {
         int code = Integer.parseInt(m.group(1));
 
         if (code != HttpURLConnection.HTTP_OK) {
-            throw new ProxyException(ProxyInfo.ProxyType.HTTP,
-                "Error code in proxy response: " + code);
+            throw new ProxyException(ProxyInfo.ProxyType.HTTP);
         }
     }
 

smack-core/src/main/java/org/jivesoftware/smack/util/ParserUtils.java

@@ -129,27 +129,6 @@ public class ParserUtils {
         return Resourcepart.from(resourcepartString);
     }
 
-    /**
-     * Prase a string to a boolean value as per "xs:boolean". Valid input strings are "true", "1" for true, and "false", "0" for false.
-     *
-     * @param booleanString the input string.
-     * @return the boolean representation of the input string
-     * @throws IllegalArgumentException if the input string is not valid.
-     * @since 4.3.2
-     */
-    public static boolean parseXmlBoolean(String booleanString) {
-        switch (booleanString) {
-        case "true":
-        case "1":
-            return true;
-        case "false":
-        case "0":
-            return false;
-        default:
-            throw new IllegalArgumentException(booleanString + " is not a valid boolean string");
-        }
-    }
-
     /**
      * Get the boolean value of an argument.
      *
@@ -162,7 +141,7 @@ public class ParserUtils {
         if (valueString == null)
             return null;
         valueString = valueString.toLowerCase(Locale.US);
-        return parseXmlBoolean(valueString);
+        return valueString.equals("true") || valueString.equals("0");
     }
 
     public static boolean getBooleanAttribute(XmlPullParser parser, String name,

smack-core/src/main/java/org/jivesoftware/smack/util/XmlUtil.java

@@ -35,11 +35,7 @@ public class XmlUtil {
     private static final TransformerFactory transformerFactory = TransformerFactory.newInstance();
 
     static {
-        try {
-            transformerFactory.setAttribute("indent-number", 2);
-        } catch (IllegalArgumentException e) {
-            LOGGER.log(Level.INFO, "XML TransformerFactory does not support indent-number attribute", e);
-        }
+        transformerFactory.setAttribute("indent-number", 2);
     }
 
     public static String prettyFormatXml(CharSequence xml) {

smack-core/src/test/java/org/jivesoftware/smack/ConnectionConfigurationTest.java

@@ -1,79 +0,0 @@
-/**
- *
- * Copyright 2018 Florian Schmaus.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack;
-
-import static org.junit.Assert.assertEquals;
-
-import org.junit.Test;
-import org.jxmpp.jid.JidTestUtil;
-
-public class ConnectionConfigurationTest {
-
-    @Test
-    public void setIp() {
-        DummyConnectionConfiguration.Builder builder = newUnitTestBuilder();
-
-        final String ip = "192.168.0.1";
-        builder.setHostAddressByNameOrIp(ip);
-
-        DummyConnectionConfiguration connectionConfiguration = builder.build();
-        assertEquals('/' + ip, connectionConfiguration.getHostAddress().toString());
-    }
-
-    @Test
-    public void setFqdn() {
-        DummyConnectionConfiguration.Builder builder = newUnitTestBuilder();
-
-        final String fqdn = "foo.example.org";
-        builder.setHostAddressByNameOrIp(fqdn);
-
-        DummyConnectionConfiguration connectionConfiguration = builder.build();
-        assertEquals(fqdn, connectionConfiguration.getHost().toString());
-    }
-
-    private static DummyConnectionConfiguration.Builder newUnitTestBuilder() {
-        DummyConnectionConfiguration.Builder builder = DummyConnectionConfiguration.builder();
-        builder.setXmppDomain(JidTestUtil.DOMAIN_BARE_JID_1);
-        return builder;
-    }
-
-    private static final class DummyConnectionConfiguration extends ConnectionConfiguration {
-
-        protected DummyConnectionConfiguration(Builder builder) {
-            super(builder);
-        }
-
-        public static Builder builder() {
-            return new Builder();
-        }
-
-        private static final class Builder
-                        extends ConnectionConfiguration.Builder<Builder, DummyConnectionConfiguration> {
-
-            @Override
-            public DummyConnectionConfiguration build() {
-                return new DummyConnectionConfiguration(this);
-            }
-
-            @Override
-            protected Builder getThis() {
-                return this;
-            }
-
-        }
-    }
-}

smack-core/src/test/java/org/jivesoftware/smack/DummyConnection.java

@@ -100,11 +100,6 @@ public class DummyConnection extends AbstractXMPPConnection {
         callConnectionClosedListener();
     }
 
-    @Override
-    public void instantShutdown() {
-        shutdown();
-    }
-
     @Override
     public boolean isSecureConnection() {
         return false;
@@ -231,5 +226,4 @@ public class DummyConnection extends AbstractXMPPConnection {
             }
         }
     }
-
 }

smack-core/src/test/java/org/jivesoftware/smack/packet/StreamErrorTest.java

@@ -104,22 +104,4 @@ public class StreamErrorTest {
         assertNotNull(appSpecificElement);
     }
 
-    @Test
-    public void testStreamErrorXmlNotWellFormed() {
-        StreamError error = null;
-        final String xml =
-                // Usually the stream:stream element has more attributes (to, version, ...)
-                // We omit those, since they are not relevant for testing
-                "<stream:stream from='im.example.com' id='++TR84Sm6A3hnt3Q065SnAbbk3Y=' xmlns:stream='http://etherx.jabber.org/streams'>" +
-                        "<stream:error><xml-not-well-formed xmlns='urn:ietf:params:xml:ns:xmpp-streams'/></stream:error>" +
-                        "</stream:stream>";
-        try {
-            XmlPullParser parser = PacketParserUtils.getParserFor(xml, "error");
-            error = PacketParserUtils.parseStreamError(parser);
-        } catch (Exception e) {
-            fail(e.getMessage());
-        }
-        assertNotNull(error);
-        assertEquals(Condition.not_well_formed, error.getCondition());
-    }
 }

smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProvider.java

@@ -16,8 +16,6 @@
  */
 package org.jivesoftware.smackx.hoxt.provider;
 
-import org.jivesoftware.smack.util.ParserUtils;
-
 import org.jivesoftware.smackx.hoxt.packet.HttpMethod;
 import org.jivesoftware.smackx.hoxt.packet.HttpOverXmppReq;
 
@@ -49,13 +47,13 @@ public class HttpOverXmppReqProvider extends AbstractHttpOverXmppProvider<HttpOv
         String jingleStr = parser.getAttributeValue("", AbstractHttpOverXmppProvider.ELEMENT_JINGLE);
 
         if (sipubStr != null) {
-            builder.setSipub(ParserUtils.parseXmlBoolean(sipubStr));
+            builder.setSipub(Boolean.valueOf(sipubStr));
         }
         if (ibbStr != null) {
-            builder.setIbb(ParserUtils.parseXmlBoolean(ibbStr));
+            builder.setIbb(Boolean.valueOf(ibbStr));
         }
         if (jingleStr != null) {
-            builder.setJingle(ParserUtils.parseXmlBoolean(jingleStr));
+            builder.setJingle(Boolean.valueOf(jingleStr));
         }
 
         String maxChunkSize = parser.getAttributeValue("", ATTRIBUTE_MAX_CHUNK_SIZE);

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/SetBoolData.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2016-2018 Florian Schmaus
+ * Copyright © 2016 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
  */
 package org.jivesoftware.smackx.iot.control.element;
 
-import org.jivesoftware.smack.util.ParserUtils;
-
 public class SetBoolData extends SetData {
 
     public SetBoolData(String name, boolean value) {
@@ -33,7 +31,7 @@ public class SetBoolData extends SetData {
 
     public Boolean getBooleanValue() {
         if (booleanCache != null) {
-            booleanCache = ParserUtils.parseXmlBoolean(getValue());
+            booleanCache = Boolean.valueOf(getValue());
         }
         return booleanCache;
     }

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_filetransfer/JingleFileTransferManager.java

@@ -32,7 +32,7 @@ public final class JingleFileTransferManager extends Manager {
         super(connection);
     }
 
-    public static synchronized JingleFileTransferManager getInstanceFor(XMPPConnection connection) {
+    public static JingleFileTransferManager getInstanceFor(XMPPConnection connection) {
         JingleFileTransferManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new JingleFileTransferManager(connection);

smack-experimental/src/main/java/org/jivesoftware/smackx/mam/MamManager.java

@@ -114,8 +114,8 @@ import org.jxmpp.jid.Jid;
  * <pre>
  * {@code
  * MamQueryArgs mamQueryArgs = MamQueryArgs.builder()
- *                                 .limitResultsToJid(jid)
- *                                 .setResultPageSizeTo(10)
+ *                                 .withJid(jid)
+ *                                 .setResultPageSize(10)
  *                                 .queryLastPage()
  *                                 .build();
  * MamQuery mamQuery = mamManager.queryArchive(mamQueryArgs);
@@ -178,9 +178,7 @@ public final class MamManager extends Manager {
      * @param connection the XMPP connection to get the archive for.
      * @return the instance of MamManager.
      */
-    // CHECKSTYLE:OFF:RegexpSingleline
     public static MamManager getInstanceFor(XMPPConnection connection) {
-    // CHECKSTYLE:ON:RegexpSingleline
         return getInstanceFor(connection, (Jid) null);
     }
 
@@ -997,7 +995,7 @@ public final class MamManager extends Manager {
         public List<Message> pagePrevious(int count) throws NoResponseException, XMPPErrorException,
                         NotConnectedException, NotLoggedInException, InterruptedException {
             RSMSet previousResultRsmSet = getPreviousRsmSet();
-            RSMSet requestRsmSet = new RSMSet(count, previousResultRsmSet.getFirst(), RSMSet.PageDirection.before);
+            RSMSet requestRsmSet = new RSMSet(count, previousResultRsmSet.getLast(), RSMSet.PageDirection.before);
             return page(requestRsmSet);
         }
 

smack-experimental/src/main/java/org/jivesoftware/smackx/reference/ReferenceManager.java

@@ -51,7 +51,7 @@ public final class ReferenceManager extends Manager {
      * @param connection xmpp connection
      * @return reference manager instance
      */
-    public static synchronized ReferenceManager getInstanceFor(XMPPConnection connection) {
+    public static ReferenceManager getInstanceFor(XMPPConnection connection) {
         ReferenceManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new ReferenceManager(connection);

smack-experimental/src/main/java/org/jivesoftware/smackx/sid/StableUniqueStanzaIdManager.java

@@ -27,6 +27,7 @@ import org.jivesoftware.smack.XMPPConnectionRegistry;
 import org.jivesoftware.smack.filter.AndFilter;
 import org.jivesoftware.smack.filter.MessageTypeFilter;
 import org.jivesoftware.smack.filter.NotFilter;
+import org.jivesoftware.smack.filter.StanzaExtensionFilter;
 import org.jivesoftware.smack.filter.StanzaFilter;
 import org.jivesoftware.smack.filter.ToTypeFilter;
 import org.jivesoftware.smack.packet.Message;
@@ -45,12 +46,13 @@ public final class StableUniqueStanzaIdManager extends Manager {
             MessageTypeFilter.NORMAL_OR_CHAT_OR_HEADLINE,
             ToTypeFilter.ENTITY_FULL_OR_BARE_JID);
 
+    private static final StanzaFilter ORIGIN_ID_FILTER = new StanzaExtensionFilter(OriginIdElement.ELEMENT, NAMESPACE);
+
     // Listener for outgoing stanzas that adds origin-ids to outgoing stanzas.
-    private static final StanzaListener ADD_ORIGIN_ID_INTERCEPTOR = new StanzaListener() {
+    private final StanzaListener stanzaListener = new StanzaListener() {
         @Override
         public void processStanza(Stanza stanza) {
-            Message message = (Message) stanza;
-            OriginIdElement.addOriginId(message);
+            OriginIdElement.addOriginId((Message) stanza);
         }
     };
 
@@ -78,7 +80,7 @@ public final class StableUniqueStanzaIdManager extends Manager {
      * @param connection xmpp-connection
      * @return manager instance for the connection
      */
-    public static synchronized StableUniqueStanzaIdManager getInstanceFor(XMPPConnection connection) {
+    public static StableUniqueStanzaIdManager getInstanceFor(XMPPConnection connection) {
         StableUniqueStanzaIdManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new StableUniqueStanzaIdManager(connection);
@@ -93,7 +95,7 @@ public final class StableUniqueStanzaIdManager extends Manager {
     public synchronized void enable() {
         ServiceDiscoveryManager.getInstanceFor(connection()).addFeature(NAMESPACE);
         StanzaFilter filter = new AndFilter(OUTGOING_FILTER, new NotFilter(OUTGOING_FILTER));
-        connection().addStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR, filter);
+        connection().addStanzaInterceptor(stanzaListener, filter);
     }
 
     /**
@@ -101,7 +103,7 @@ public final class StableUniqueStanzaIdManager extends Manager {
      */
     public synchronized void disable() {
         ServiceDiscoveryManager.getInstanceFor(connection()).removeFeature(NAMESPACE);
-        connection().removeStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR);
+        connection().removeStanzaInterceptor(stanzaListener);
     }
 
     /**

smack-experimental/src/main/java/org/jivesoftware/smackx/sid/provider/OriginIdProvider.java

@@ -23,11 +23,7 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class OriginIdProvider extends ExtensionElementProvider<OriginIdElement> {
 
-    public static final OriginIdProvider INSTANCE = new OriginIdProvider();
-
-    // TODO: Remove in Smack 4.4.
-    @Deprecated
-    public static final OriginIdProvider TEST_INSTANCE = INSTANCE;
+    public static final OriginIdProvider TEST_INSTANCE = new OriginIdProvider();
 
     @Override
     public OriginIdElement parse(XmlPullParser parser, int initialDepth) throws Exception {

smack-experimental/src/main/java/org/jivesoftware/smackx/sid/provider/StanzaIdProvider.java

@@ -23,11 +23,7 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class StanzaIdProvider extends ExtensionElementProvider<StanzaIdElement> {
 
-    public static final StanzaIdProvider INSTANCE = new StanzaIdProvider();
-
-    // TODO: Remove in Smack 4.4.
-    @Deprecated
-    public static final StanzaIdProvider TEST_INSTANCE = INSTANCE;
+    public static StanzaIdProvider TEST_INSTANCE = new StanzaIdProvider();
 
     @Override
     public StanzaIdElement parse(XmlPullParser parser, int initialDepth) throws Exception {

smack-experimental/src/main/java/org/jivesoftware/smackx/spoiler/SpoilerManager.java

@@ -61,7 +61,7 @@ public final class SpoilerManager extends Manager {
      * @param connection xmpp connection
      * @return SpoilerManager
      */
-    public static synchronized SpoilerManager getInstanceFor(XMPPConnection connection) {
+    public static SpoilerManager getInstanceFor(XMPPConnection connection) {
         SpoilerManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new SpoilerManager(connection);

smack-experimental/src/test/java/org/jivesoftware/smackx/sid/StableUniqueStanzaIdTest.java

@@ -25,7 +25,6 @@ import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.test.util.SmackTestSuite;
 import org.jivesoftware.smack.test.util.TestUtils;
-import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smackx.sid.element.OriginIdElement;
 import org.jivesoftware.smackx.sid.element.StanzaIdElement;
 import org.jivesoftware.smackx.sid.provider.OriginIdProvider;
@@ -43,7 +42,7 @@ public class StableUniqueStanzaIdTest extends SmackTestSuite {
         assertEquals("alice@wonderland.lit", element.getBy());
         assertXMLEqual(xml, element.toXML(null).toString());
 
-        StanzaIdElement parsed = StanzaIdProvider.INSTANCE.parse(TestUtils.getParser(xml));
+        StanzaIdElement parsed = StanzaIdProvider.TEST_INSTANCE.parse(TestUtils.getParser(xml));
         assertEquals(element.getId(), parsed.getId());
         assertEquals(element.getBy(), parsed.getBy());
     }
@@ -55,7 +54,7 @@ public class StableUniqueStanzaIdTest extends SmackTestSuite {
         assertEquals("de305d54-75b4-431b-adb2-eb6b9e546013", element.getId());
         assertXMLEqual(xml, element.toXML(null).toString());
 
-        OriginIdElement parsed = OriginIdProvider.INSTANCE.parse(TestUtils.getParser(xml));
+        OriginIdElement parsed = OriginIdProvider.TEST_INSTANCE.parse(TestUtils.getParser(xml));
         assertEquals(element.getId(), parsed.getId());
     }
 
@@ -82,17 +81,4 @@ public class StableUniqueStanzaIdTest extends SmackTestSuite {
         assertTrue(StanzaIdElement.hasStanzaId(message));
         assertEquals(stanzaId, StanzaIdElement.getStanzaId(message));
     }
-
-    @Test
-    public void testMultipleUssidExtensions() throws Exception {
-        String message = "<message xmlns='jabber:client' from='e4aec989-3e20-4846-83bf-f50df89b5d07@muclight.example.com/user1@example.com' to='user1@example.com' id='6b71fe3a-3cb2-489c-9c8e-b6879761d15e' type='groupchat'>" +
-                          "<body>Test message</body>" +
-                          "<markable xmlns='urn:xmpp:chat-markers:0'/>" +
-                          "<stanza-id by='e4aec989-3e20-4846-83bf-f50df89b5d07@muclight.example.com' id='B0KK24ETVC81' xmlns='urn:xmpp:sid:0'/>" +
-                          "<stanza-id by='user1@example.com' id='B0KK24EV89G1' xmlns='urn:xmpp:sid:0'/>" +
-                        "</message>";
-        Message messageStanza = PacketParserUtils.parseStanza(message);
-
-        assertTrue(StanzaIdElement.hasStanzaId(messageStanza));
-    }
 }

smack-extensions/src/main/java/org/jivesoftware/smackx/bookmarks/Bookmarks.java

@@ -269,12 +269,12 @@ public class Bookmarks implements PrivateData {
 
     private static BookmarkedConference getConferenceStorage(XmlPullParser parser) throws XmlPullParserException, IOException {
         String name = parser.getAttributeValue("", "name");
-        boolean autojoin = ParserUtils.getBooleanAttribute(parser, "autojoin", false);
+        String autojoin = parser.getAttributeValue("", "autojoin");
         EntityBareJid jid = ParserUtils.getBareJidAttribute(parser);
 
         BookmarkedConference conf = new BookmarkedConference(jid);
         conf.setName(name);
-        conf.setAutoJoin(autojoin);
+        conf.setAutoJoin(Boolean.valueOf(autojoin));
 
         // Check for nickname
         boolean done = false;

smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java

@@ -211,7 +211,6 @@ public final class Socks5Proxy {
             if (this.serverSocket != null) {
                 this.serverThread = new Thread(this.serverProcess);
                 this.serverThread.setName("Smack Local SOCKS5 Proxy");
-                this.serverThread.setDaemon(true);
                 this.serverThread.start();
             }
         }

smack-extensions/src/main/java/org/jivesoftware/smackx/disco/ServiceDiscoveryManager.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2003-2007 Jive Software, 2018-2019 Florian Schmaus.
+ * Copyright 2003-2007 Jive Software, 2018 Florian Schmaus.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -227,7 +227,7 @@ public final class ServiceDiscoveryManager extends Manager {
     /**
      * Returns the type of client that will be returned when asked for the client identity in a
      * disco request. The valid types are defined by the category client. Follow this link to learn
-     * the possible types: <a href="https://xmpp.org/registrar/disco-categories.html">XMPP Registry for Service Discovery Identities</a>
+     * the possible types: <a href="http://xmpp.org/registrar/disco-categories.html#client">Jabber::Registrar</a>.
      *
      * @return the type of client that will be returned when asked for the client identity in a
      *          disco request.
@@ -271,8 +271,8 @@ public final class ServiceDiscoveryManager extends Manager {
      */
     public Set<DiscoverInfo.Identity> getIdentities() {
         Set<Identity> res = new HashSet<>(identities);
-        // Add the main identity that must exist
-        res.add(identity);
+        // Add the default identity that must exist
+        res.add(defaultIdentity);
         return Collections.unmodifiableSet(res);
     }
 

smack-extensions/src/main/java/org/jivesoftware/smackx/disco/packet/DiscoverInfo.java

@@ -263,7 +263,7 @@ public class DiscoverInfo extends IQ implements TypedCloneable<DiscoverInfo> {
      * Represents the identity of a given XMPP entity. An entity may have many identities but all
      * the identities SHOULD have the same name.<p>
      *
-     * Refer to <a href="https://xmpp.org/registrar/disco-categories.html">XMPP Registry for Service Discovery Identities</a>
+     * Refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
      * in order to get the official registry of values for the <i>category</i> and <i>type</i>
      * attributes.
      *
@@ -327,7 +327,7 @@ public class DiscoverInfo extends IQ implements TypedCloneable<DiscoverInfo> {
 
         /**
          * Returns the entity's category. To get the official registry of values for the
-         * 'category' attribute refer to <a href="https://xmpp.org/registrar/disco-categories.html">XMPP Registry for Service Discovery Identities</a>.
+         * 'category' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
          *
          * @return the entity's category.
          */
@@ -346,7 +346,7 @@ public class DiscoverInfo extends IQ implements TypedCloneable<DiscoverInfo> {
 
         /**
          * Returns the entity's type. To get the official registry of values for the
-         * 'type' attribute refer to <a href="https://xmpp.org/registrar/disco-categories.html">XMPP Registry for Service Discovery Identities</a>.
+         * 'type' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
          *
          * @return the entity's type.
          */

smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/JingleTransportMethodManager.java

@@ -48,7 +48,7 @@ public final class JingleTransportMethodManager extends Manager {
         super(connection);
     }
 
-    public static synchronized JingleTransportMethodManager getInstanceFor(XMPPConnection connection) {
+    public static JingleTransportMethodManager getInstanceFor(XMPPConnection connection) {
         JingleTransportMethodManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new JingleTransportMethodManager(connection);

smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transports/jingle_ibb/JingleIBBTransportManager.java

@@ -38,7 +38,7 @@ public final class JingleIBBTransportManager extends JingleTransportManager<Jing
         JingleContentProviderManager.addJingleContentTransportProvider(getNamespace(), new JingleIBBTransportProvider());
     }
 
-    public static synchronized JingleIBBTransportManager getInstanceFor(XMPPConnection connection) {
+    public static JingleIBBTransportManager getInstanceFor(XMPPConnection connection) {
         JingleIBBTransportManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new JingleIBBTransportManager(connection);

smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transports/jingle_s5b/JingleS5BTransportManager.java

@@ -63,7 +63,7 @@ public final class JingleS5BTransportManager extends JingleTransportManager<Jing
         JingleContentProviderManager.addJingleContentTransportProvider(getNamespace(), new JingleS5BTransportProvider());
     }
 
-    public static synchronized JingleS5BTransportManager getInstanceFor(XMPPConnection connection) {
+    public static JingleS5BTransportManager getInstanceFor(XMPPConnection connection) {
         JingleS5BTransportManager manager = INSTANCES.get(connection);
         if (manager == null) {
             manager = new JingleS5BTransportManager(connection);

smack-extensions/src/main/java/org/jivesoftware/smackx/jiveproperties/provider/JivePropertiesExtensionProvider.java

@@ -92,9 +92,7 @@ public class JivePropertiesExtensionProvider extends ExtensionElementProvider<Ji
                                 value = Double.valueOf(valueText);
                             }
                             else if ("boolean".equals(type)) {
-                                // CHECKSTYLE:OFF
                                 value = Boolean.valueOf(valueText);
-                                // CHECKSTYLE:ON
                             }
                             else if ("string".equals(type)) {
                                 value = valueText;

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java

@@ -205,6 +205,7 @@ public class MultiUserChat {
                 final Presence presence = (Presence) packet;
                 final EntityFullJid from = presence.getFrom().asEntityFullJidIfPossible();
                 if (from == null) {
+                    LOGGER.warning("Presence not from a full JID: " + presence.getFrom());
                     return;
                 }
                 final EntityFullJid myRoomJID = myRoomJid;
@@ -340,9 +341,8 @@ public class MultiUserChat {
 
         // Setup the messageListeners and presenceListeners *before* the join presence is send.
         connection.addSyncStanzaListener(messageListener, fromRoomGroupchatFilter);
-        StanzaFilter presenceFromRoomFilter = new AndFilter(fromRoomFilter,
-                        StanzaTypeFilter.PRESENCE);
-        connection.addSyncStanzaListener(presenceListener, presenceFromRoomFilter);
+        connection.addSyncStanzaListener(presenceListener, new AndFilter(fromRoomFilter,
+                        StanzaTypeFilter.PRESENCE));
         // @formatter:off
         connection.addSyncStanzaListener(subjectListener,
                         new AndFilter(fromRoomFilter,
@@ -371,27 +371,15 @@ public class MultiUserChat {
                         )
                     );
         // @formatter:on
-        StanzaCollector presenceStanzaCollector = null;
         Presence presence;
         try {
-            // This stanza collector will collect the final self presence from the MUC, which also signals that we have successful entered the MUC.
-            StanzaCollector selfPresenceCollector = connection.createStanzaCollectorAndSend(responseFilter, joinPresence);
-            StanzaCollector.Configuration presenceStanzaCollectorConfguration = StanzaCollector.newConfiguration().setCollectorToReset(
-                            selfPresenceCollector).setStanzaFilter(presenceFromRoomFilter);
-            // This stanza collector is used to reset the timeout of the selfPresenceCollector.
-            presenceStanzaCollector = connection.createStanzaCollector(presenceStanzaCollectorConfguration);
-            presence = selfPresenceCollector.nextResultOrThrow(conf.getTimeout());
+            presence = connection.createStanzaCollectorAndSend(responseFilter, joinPresence).nextResultOrThrow(conf.getTimeout());
         }
         catch (NotConnectedException | InterruptedException | NoResponseException | XMPPErrorException e) {
             // Ensure that all callbacks are removed if there is an exception
             removeConnectionCallbacks();
             throw e;
         }
-        finally {
-            if (presenceStanzaCollector != null) {
-                presenceStanzaCollector.cancel();
-            }
-        }
 
         // This presence must be send from a full JID. We use the resourcepart of this JID as nick, since the room may
         // performed roomnick rewriting
@@ -747,12 +735,7 @@ public class MultiUserChat {
         // If we've already joined the room, leave it before joining under a new
         // nickname.
         if (joined) {
-            try {
-                leaveSync();
-            }
-            catch (XMPPErrorException | NoResponseException | MucNotJoinedException e) {
-                LOGGER.log(Level.WARNING, "Could not leave MUC prior joining, assuming we are not joined", e);
-            }
+            leave();
         }
         enter(mucEnterConfiguration);
     }
@@ -793,50 +776,6 @@ public class MultiUserChat {
         connection.sendStanza(leavePresence);
     }
 
-    /**
-     * Leave the chat room.
-     *
-     * @return the leave presence as reflected by the MUC.
-     * @throws NotConnectedException
-     * @throws InterruptedException
-     * @throws XMPPErrorException
-     * @throws NoResponseException
-     * @throws MucNotJoinedException
-     */
-    public synchronized Presence leaveSync()
-                    throws NotConnectedException, InterruptedException, NoResponseException, XMPPErrorException, MucNotJoinedException {
-        //  Note that this method is intentionally not guarded by
-        // "if  (!joined) return" because it should be always be possible to leave the room in case the instance's
-        // state does not reflect the actual state.
-
-        // Reset occupant information first so that we are assume that we left the room even if sendStanza() would
-        // throw.
-        userHasLeft();
-
-        final EntityFullJid myRoomJid = this.myRoomJid;
-        if (myRoomJid == null) {
-            throw new MucNotJoinedException(this);
-        }
-
-        // We leave a room by sending a presence packet where the "to"
-        // field is in the form "roomName@service/nickname"
-        Presence leavePresence = new Presence(Presence.Type.unavailable);
-        leavePresence.setTo(myRoomJid);
-
-        StanzaFilter reflectedLeavePresenceFilter = new AndFilter(
-                        StanzaTypeFilter.PRESENCE,
-                        new StanzaIdFilter(leavePresence),
-                        new OrFilter(
-                                        new AndFilter(FromMatchesFilter.createFull(myRoomJid), PresenceTypeFilter.UNAVAILABLE, MUCUserStatusCodeFilter.STATUS_110_PRESENCE_TO_SELF),
-                                        new AndFilter(fromRoomFilter, PresenceTypeFilter.ERROR)
-                                    )
-                                );
-
-        Presence reflectedLeavePresence = connection.createStanzaCollectorAndSend(reflectedLeavePresenceFilter, leavePresence).nextResultOrThrow();
-
-        return reflectedLeavePresence;
-    }
-
     /**
      * Get a {@link MucConfigFormManager} to configure this room.
      * <p>

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatManager.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.muc;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -393,46 +392,19 @@ public final class MultiUserChatManager extends Manager {
      * @throws NotConnectedException
      * @throws InterruptedException
      * @throws NotAMucServiceException
-     * @deprecated use {@link #getRoomsHostedBy(DomainBareJid)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.4.
     public List<HostedRoom> getHostedRooms(DomainBareJid serviceName) throws NoResponseException, XMPPErrorException,
                     NotConnectedException, InterruptedException, NotAMucServiceException {
-        Map<EntityBareJid, HostedRoom> hostedRooms = getRoomsHostedBy(serviceName);
-        return new ArrayList<>(hostedRooms.values());
-    }
-
-    /**
-     * Returns a Map of HostedRooms where each HostedRoom has the XMPP address of the room and the room's name.
-     * Once discovered the rooms hosted by a chat service it is possible to discover more detailed room information or
-     * join the room.
-     *
-     * @param serviceName the service that is hosting the rooms to discover.
-     * @return a map from the room's address to its HostedRoom information.
-     * @throws XMPPErrorException
-     * @throws NoResponseException
-     * @throws NotConnectedException
-     * @throws InterruptedException
-     * @throws NotAMucServiceException
-     * @since 4.3.1
-     */
-    public Map<EntityBareJid, HostedRoom> getRoomsHostedBy(DomainBareJid serviceName) throws NoResponseException, XMPPErrorException,
-                    NotConnectedException, InterruptedException, NotAMucServiceException {
         if (!providesMucService(serviceName)) {
             throw new NotAMucServiceException(serviceName);
         }
         ServiceDiscoveryManager discoManager = ServiceDiscoveryManager.getInstanceFor(connection());
         DiscoverItems discoverItems = discoManager.discoverItems(serviceName);
         List<DiscoverItems.Item> items = discoverItems.getItems();
-
-        Map<EntityBareJid, HostedRoom> answer = new HashMap<>(items.size());
+        List<HostedRoom> answer = new ArrayList<HostedRoom>(items.size());
         for (DiscoverItems.Item item : items) {
-            HostedRoom hostedRoom = new HostedRoom(item);
-            HostedRoom previousRoom = answer.put(hostedRoom.getJid(), hostedRoom);
-            assert previousRoom == null;
+            answer.add(new HostedRoom(item));
         }
-
         return answer;
     }
 

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/RoomInfo.java

@@ -207,8 +207,7 @@ public class RoomInfo {
 
             FormField subjectmodField = form.getField("muc#roominfo_subjectmod");
             if (subjectmodField != null && !subjectmodField.getValues().isEmpty()) {
-                String firstValue = subjectmodField.getFirstValue();
-                subjectmod = ("true".equals(firstValue) || "1".equals(firstValue));
+                subjectmod = Boolean.valueOf(subjectmodField.getFirstValue());
             }
 
             FormField urlField = form.getField("muc#roominfo_logs");

smack-extensions/src/main/java/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2013-2014 Georg Lukas, 2015-2019 Florian Schmaus
+ * Copyright 2013-2014 Georg Lukas, 2015 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -74,16 +74,8 @@ import org.jxmpp.jid.Jid;
  */
 public final class DeliveryReceiptManager extends Manager {
 
-    /**
-     * Filters all non-error messages with receipt requests.
-     * See <a href="https://xmpp.org/extensions/xep-0184.html#when">XEP-0184 § 5.</a> "A sender could request receipts
-     * on any non-error content message (chat, groupchat, headline, or normal)…"
-     */
-    private static final StanzaFilter NON_ERROR_GROUPCHAT_MESSAGES_WITH_DELIVERY_RECEIPT_REQUEST = new AndFilter(
-            StanzaTypeFilter.MESSAGE,
-            new StanzaExtensionFilter(new DeliveryReceiptRequest()),
-            new NotFilter(MessageTypeFilter.ERROR));
-
+    private static final StanzaFilter MESSAGES_WITH_DELIVERY_RECEIPT_REQUEST = new AndFilter(StanzaTypeFilter.MESSAGE,
+                    new StanzaExtensionFilter(new DeliveryReceiptRequest()));
     private static final StanzaFilter MESSAGES_WITH_DELIVERY_RECEIPT = new AndFilter(StanzaTypeFilter.MESSAGE,
                     new StanzaExtensionFilter(DeliveryReceipt.ELEMENT, DeliveryReceipt.NAMESPACE));
 
@@ -183,7 +175,7 @@ public final class DeliveryReceiptManager extends Manager {
                 }
                 connection.sendStanza(ack);
             }
-        }, NON_ERROR_GROUPCHAT_MESSAGES_WITH_DELIVERY_RECEIPT_REQUEST);
+        }, MESSAGES_WITH_DELIVERY_RECEIPT_REQUEST);
     }
 
     /**

smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/FormField.java

@@ -261,14 +261,12 @@ public class FormField implements NamedElement {
      */
     public String getFirstValue() {
         CharSequence firstValue;
-
         synchronized (values) {
-            if (values.isEmpty()) {
-                return null;
-            }
             firstValue = values.get(0);
         }
-
+        if (firstValue == null) {
+            return null;
+        }
         return firstValue.toString();
     }
 

smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java

@@ -951,7 +951,8 @@ public final class Roster extends Manager {
             // This is used in case no available presence is found
             Presence unavailable = null;
 
-            for (Presence p : userPresences.values()) {
+            for (Resourcepart resource : userPresences.keySet()) {
+                Presence p = userPresences.get(resource);
                 if (!p.isAvailable()) {
                     unavailable = p;
                     continue;
@@ -1471,29 +1472,7 @@ public final class Roster extends Manager {
             final Presence presence = (Presence) packet;
             final Jid from = presence.getFrom();
 
-            final BareJid key;
-            if (from != null) {
-                key = from.asBareJid();
-            } else {
-                XMPPConnection connection = connection();
-                if (connection == null) {
-                    LOGGER.finest("Connection was null while trying to handle exotic presence stanza: " + presence);
-                    return;
-                }
-                // Assume the presence come "from the users account on the server" since no from was set (RFC 6120 §
-                // 8.1.2.1 4.). Note that getUser() may return null, but should never return null in this case as where
-                // connected.
-                EntityFullJid myJid = connection.getUser();
-                if (myJid == null) {
-                    LOGGER.info(
-                            "Connection had no local address in Roster's presence listener."
-                            + " Possibly we received a presence without from before being authenticated."
-                            + " Presence: " + presence);
-                    return;
-                }
-                LOGGER.info("Exotic presence stanza without from received: " + presence);
-                key = myJid.asBareJid();
-            }
+            final BareJid key = from != null ? from.asBareJid() : null;
 
             asyncButOrdered.performAsyncButOrdered(key, new Runnable() {
                 @Override

smack-integration-test/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatIntegrationTest.java

@@ -16,9 +16,6 @@
  */
 package org.jivesoftware.smackx.muc;
 
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-
 import java.util.List;
 
 import org.jivesoftware.smack.MessageListener;
@@ -26,12 +23,8 @@ import org.jivesoftware.smack.SmackException.NoResponseException;
 import org.jivesoftware.smack.SmackException.NotConnectedException;
 import org.jivesoftware.smack.XMPPException.XMPPErrorException;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.Presence;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smackx.muc.MultiUserChat.MucCreateConfigFormHandle;
-import org.jivesoftware.smackx.muc.MultiUserChatException.MucNotJoinedException;
-import org.jivesoftware.smackx.muc.MultiUserChatException.NotAMucServiceException;
-import org.jivesoftware.smackx.muc.packet.MUCUser;
 
 import org.igniterealtime.smack.inttest.AbstractSmackIntegrationTest;
 import org.igniterealtime.smack.inttest.SmackIntegrationTest;
@@ -43,7 +36,6 @@ import org.jxmpp.jid.EntityBareJid;
 import org.jxmpp.jid.impl.JidCreate;
 import org.jxmpp.jid.parts.Localpart;
 import org.jxmpp.jid.parts.Resourcepart;
-import org.jxmpp.stringprep.XmppStringprepException;
 
 public class MultiUserChatIntegrationTest extends AbstractSmackIntegrationTest {
 
@@ -69,24 +61,6 @@ public class MultiUserChatIntegrationTest extends AbstractSmackIntegrationTest {
         }
     }
 
-    @SmackIntegrationTest
-    public void mucJoinLeaveTest() throws XmppStringprepException, NotAMucServiceException, NoResponseException,
-            XMPPErrorException, NotConnectedException, InterruptedException, MucNotJoinedException {
-        EntityBareJid mucAddress = JidCreate.entityBareFrom(Localpart.from("smack-inttest-join-leave-" + randomString),
-                mucService.getDomain());
-
-        MultiUserChat muc = mucManagerOne.getMultiUserChat(mucAddress);
-
-        muc.join(Resourcepart.from("nick-one"));
-
-        Presence reflectedLeavePresence = muc.leaveSync();
-
-        MUCUser mucUser = MUCUser.from(reflectedLeavePresence);
-        assertNotNull(mucUser);
-
-        assertTrue(mucUser.getStatus().contains(MUCUser.Status.PRESENCE_TO_SELF_110));
-    }
-
     @SmackIntegrationTest
     public void mucTest() throws Exception {
         EntityBareJid mucAddress = JidCreate.entityBareFrom(Localpart.from("smack-inttest-" + randomString), mucService.getDomain());

smack-jingle-old/src/main/java/org/jivesoftware/smackx/jingleold/JingleSession.java

@@ -620,7 +620,7 @@ public class JingleSession extends JingleNegotiator implements MediaReceivedList
      *            A XMPP connection
      * @return a Jingle session
      */
-    public static synchronized JingleSession getInstanceFor(XMPPConnection con) {
+    public static JingleSession getInstanceFor(XMPPConnection con) {
         if (con == null) {
             throw new IllegalArgumentException("XMPPConnection cannot be null");
         }

smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/settings/WorkgroupProperties.java

@@ -104,9 +104,7 @@ public class WorkgroupProperties extends IQ {
             while (!done) {
                 int eventType = parser.next();
                 if ((eventType == XmlPullParser.START_TAG) && ("authRequired".equals(parser.getName()))) {
-                    // CHECKSTYLE:OFF
                     props.setAuthRequired(Boolean.valueOf(parser.nextText()).booleanValue());
-                    // CHECKSTYLE:ON
                 }
                 else if ((eventType == XmlPullParser.START_TAG) && ("email".equals(parser.getName()))) {
                     props.setEmail(parser.nextText());

smack-resolver-javax/src/main/java/org/jivesoftware/smack/util/dns/javax/JavaxResolver.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2013-2019 Florian Schmaus
+ * Copyright 2013-2018 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,6 @@ import org.minidns.dnsname.DnsName;
 
 /**
  * A DNS resolver (mostly for SRV records), which makes use of the API provided in the javax.* namespace.
- * Note that using JavaxResovler requires applications using newer Java versions (at least 11) to declare a dependency on the "sun.jdk" module.
  *
  * @author Florian Schmaus
  *
@@ -56,8 +55,8 @@ public class JavaxResolver extends DNSResolver implements SmackInitializer {
             Hashtable<String, String> env = new Hashtable<>();
             env.put("java.naming.factory.initial", "com.sun.jndi.dns.DnsContextFactory");
             dirContext = new InitialDirContext(env);
-        } catch (NamingException e) {
-            LOGGER.log(Level.SEVERE, "Could not construct InitialDirContext", e);
+        } catch (Exception e) {
+            // Ignore.
         }
 
         // Try to set this DNS resolver as primary one

smack-tcp/src/main/java/org/jivesoftware/smack/sm/StreamManagementException.java

@@ -16,13 +16,10 @@
  */
 package org.jivesoftware.smack.sm;
 
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.BlockingQueue;
 
 import org.jivesoftware.smack.SmackException;
-import org.jivesoftware.smack.packet.Element;
 import org.jivesoftware.smack.packet.Stanza;
 
 public abstract class StreamManagementException extends SmackException {
@@ -113,56 +110,5 @@ public abstract class StreamManagementException extends SmackException {
             return ackedStanzas;
         }
     }
-
-    public static final class UnacknowledgedQueueFullException extends StreamManagementException {
-
-        /**
-         *
-         */
-        private static final long serialVersionUID = 1L;
-
-        private final int overflowElementNum;
-        private final int droppedElements;
-        private final List<Element> elements;
-        private final List<Stanza> unacknowledgesStanzas;
-
-        private UnacknowledgedQueueFullException(String message, int overflowElementNum, int droppedElements, List<Element> elements,
-                List<Stanza> unacknowledgesStanzas) {
-            super(message);
-            this.overflowElementNum = overflowElementNum;
-            this.droppedElements = droppedElements;
-            this.elements = elements;
-            this.unacknowledgesStanzas = unacknowledgesStanzas;
-        }
-
-        public int getOverflowElementNum() {
-            return overflowElementNum;
-        }
-
-        public int getDroppedElements() {
-            return droppedElements;
-        }
-
-        public List<Element> getElements() {
-            return elements;
-        }
-
-        public List<Stanza> getUnacknowledgesStanzas() {
-            return unacknowledgesStanzas;
-        }
-
-        public static UnacknowledgedQueueFullException newWith(int overflowElementNum, List<Element> elements,
-                BlockingQueue<Stanza> unacknowledgedStanzas) {
-            final int unacknowledgesStanzasQueueSize = unacknowledgedStanzas.size();
-            List<Stanza> localUnacknowledgesStanzas = new ArrayList<>(unacknowledgesStanzasQueueSize);
-            localUnacknowledgesStanzas.addAll(unacknowledgedStanzas);
-            int droppedElements = elements.size() - overflowElementNum - 1;
-
-            String message = "The queue size " + unacknowledgesStanzasQueueSize + " is not able to fit another "
-                    + droppedElements + " potential stanzas type top-level stream-elements.";
-            return new UnacknowledgedQueueFullException(message, overflowElementNum, droppedElements, elements,
-                    localUnacknowledgesStanzas);
-        }
-    }
 }
 

smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java

@@ -51,7 +51,6 @@ import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
@@ -84,8 +83,6 @@ import org.jivesoftware.smack.SmackException.NoResponseException;
 import org.jivesoftware.smack.SmackException.NotConnectedException;
 import org.jivesoftware.smack.SmackException.NotLoggedInException;
 import org.jivesoftware.smack.SmackException.SecurityRequiredByServerException;
-import org.jivesoftware.smack.SmackException.SmackWrappedException;
-import org.jivesoftware.smack.SmackFuture;
 import org.jivesoftware.smack.StanzaListener;
 import org.jivesoftware.smack.SynchronizationPoint;
 import org.jivesoftware.smack.XMPPConnection;
@@ -168,17 +165,15 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
 
     private SSLSocket secureSocket;
 
-    private final Semaphore readerWriterSemaphore = new Semaphore(2);
+    /**
+     * Protected access level because of unit test purposes
+     */
+    protected PacketWriter packetWriter;
 
     /**
      * Protected access level because of unit test purposes
      */
-    protected final PacketWriter packetWriter = new PacketWriter();
-
-    /**
-     * Protected access level because of unit test purposes
-     */
-    protected final PacketReader packetReader = new PacketReader();
+    protected PacketReader packetReader;
 
     private final SynchronizationPoint<Exception> initialOpenStreamSend = new SynchronizationPoint<>(
                     this, "initial open stream element send to server");
@@ -283,15 +278,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
      */
     private final Collection<StanzaListener> stanzaAcknowledgedListeners = new ConcurrentLinkedQueue<>();
 
-    /**
-     * These listeners are invoked for every stanza that got dropped.
-     * <p>
-     * We use a {@link ConcurrentLinkedQueue} here in order to allow the listeners to remove
-     * themselves after they have been invoked.
-     * </p>
-     */
-    private final Collection<StanzaListener> stanzaDroppedListeners = new ConcurrentLinkedQueue<>();
-
     /**
      * This listeners are invoked for a acknowledged stanza that has the given stanza ID. They will
      * only be invoked once and automatically removed after that.
@@ -401,11 +387,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         SSLSession sslSession = secureSocket != null ? secureSocket.getSession() : null;
         saslAuthentication.authenticate(username, password, config.getAuthzid(), sslSession);
 
-        // Wait for stream features after the authentication.
-        // TODO: The name of this synchronization point "maybeCompressFeaturesReceived" is not perfect. It should be
-        // renamed to "streamFeaturesAfterAuthenticationReceived".
-        maybeCompressFeaturesReceived.checkIfSuccessOrWait();
-
         // If compression is enabled then request the server to use stream compression. XEP-170
         // recommends to perform stream compression before resource binding.
         maybeEnableCompression();
@@ -456,24 +437,9 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                 }
             }
         }
-        // Inform client about failed resumption if possible, resend stanzas otherwise
-        // Process the stanzas synchronously so a client can re-queue them for transmission
-        // before it is informed about connection success
-        if (!stanzaDroppedListeners.isEmpty()) {
-            for (Stanza stanza : previouslyUnackedStanzas) {
-                for (StanzaListener listener : stanzaDroppedListeners) {
-                    try {
-                        listener.processStanza(stanza);
-                    }
-                    catch (InterruptedException | NotConnectedException | NotLoggedInException e) {
-                        LOGGER.log(Level.FINER, "StanzaDroppedListener received exception", e);
-                    }
-                }
-            }
-        } else {
-            for (Stanza stanza : previouslyUnackedStanzas) {
-                sendStanzaInternal(stanza);
-            }
+        // (Re-)send the stanzas *after* we tried to enable SM
+        for (Stanza stanza : previouslyUnackedStanzas) {
+            sendStanzaInternal(stanza);
         }
 
         afterSuccessfulLogin(false);
@@ -502,16 +468,24 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         shutdown(false);
     }
 
-    @Override
+    /**
+     * Performs an unclean disconnect and shutdown of the connection. Does not send a closing stream stanza.
+     */
     public synchronized void instantShutdown() {
         shutdown(true);
     }
 
     private void shutdown(boolean instant) {
+        if (disconnectedButResumeable) {
+            return;
+        }
+
         // First shutdown the writer, this will result in a closing stream element getting send to
         // the server
-        LOGGER.finer("PacketWriter shutdown()");
-        packetWriter.shutdown(instant);
+        if (packetWriter != null) {
+            LOGGER.finer("PacketWriter shutdown()");
+            packetWriter.shutdown(instant);
+        }
         LOGGER.finer("PacketWriter has been shut down");
 
         if (!instant) {
@@ -526,29 +500,19 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             }
         }
 
-        LOGGER.finer("PacketReader shutdown()");
-        packetReader.shutdown();
+        if (packetReader != null) {
+            LOGGER.finer("PacketReader shutdown()");
+                packetReader.shutdown();
+        }
         LOGGER.finer("PacketReader has been shut down");
 
-        final Socket socket = this.socket;
-        if (socket != null && socket.isConnected()) {
-            try {
+        try {
                 socket.close();
-            } catch (Exception e) {
+        } catch (Exception e) {
                 LOGGER.log(Level.WARNING, "shutdown", e);
-            }
         }
 
         setWasAuthenticated();
-
-        // Wait for reader and writer threads to be terminated.
-        readerWriterSemaphore.acquireUninterruptibly(2);
-        readerWriterSemaphore.release(2);
-
-        if (disconnectedButResumeable) {
-            return;
-        }
-
         // If we are able to resume the stream, then don't set
         // connected/authenticated/usingTLS to false since we like behave like we are still
         // connected (e.g. sendStanza should not throw a NotConnectedException).
@@ -559,8 +523,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             // Reset the stream management session id to null, since if the stream is cleanly closed, i.e. sending a closing
             // stream tag, there is no longer a stream to resume.
             smSessionId = null;
-            // Note that we deliberately do not reset authenticatedConnectionInitiallyEstablishedTimestamp here, so that the
-            // information is available in the connectionClosedOnError() listeners.
         }
         authenticated = false;
         connected = false;
@@ -568,12 +530,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         reader = null;
         writer = null;
 
-        initState();
-    }
-
-    @Override
-    protected void initState() {
-        super.initState();
         maybeCompressFeaturesReceived.init();
         compressSyncPoint.init();
         smResumedSyncPoint.init();
@@ -599,7 +555,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         }
     }
 
-    private void connectUsingConfiguration() throws ConnectionException, IOException, InterruptedException {
+    private void connectUsingConfiguration() throws ConnectionException, IOException {
         List<HostAddress> failedAddresses = populateHostAddresses();
         SocketFactory socketFactory = config.getSocketFactory();
         ProxyInfo proxyInfo = config.getProxyInfo();
@@ -618,16 +574,14 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                 innerloop: while (inetAddresses.hasNext()) {
                     // Create a *new* Socket before every connection attempt, i.e. connect() call, since Sockets are not
                     // re-usable after a failed connection attempt. See also SMACK-724.
-                    SmackFuture.SocketFuture socketFuture = new SmackFuture.SocketFuture(socketFactory);
+                    socket = socketFactory.createSocket();
 
                     final InetAddress inetAddress = inetAddresses.next();
-                    final InetSocketAddress inetSocketAddress = new InetSocketAddress(inetAddress, port);
-                    LOGGER.finer("Trying to establish TCP connection to " + inetSocketAddress);
-                    socketFuture.connectAsync(inetSocketAddress, timeout);
-
+                    final String inetAddressAndPort = inetAddress + " at port " + port;
+                    LOGGER.finer("Trying to establish TCP connection to " + inetAddressAndPort);
                     try {
-                        socket = socketFuture.getOrThrow();
-                    } catch (IOException e) {
+                        socket.connect(new InetSocketAddress(inetAddress, port), timeout);
+                    } catch (Exception e) {
                         hostAddress.setException(inetAddress, e);
                         if (inetAddresses.hasNext()) {
                             continue innerloop;
@@ -635,7 +589,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                             break innerloop;
                         }
                     }
-                    LOGGER.finer("Established TCP connection to " + inetSocketAddress);
+                    LOGGER.finer("Established TCP connection to " + inetAddressAndPort);
                     // We found a host to connect to, return here
                     this.host = host;
                     this.port = port;
@@ -651,7 +605,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                     proxyInfo.getProxySocketConnection().connect(socket, host, port, timeout);
                 } catch (IOException e) {
                     hostAddress.setException(e);
-                    failedAddresses.add(hostAddress);
                     continue;
                 }
                 LOGGER.finer("Established TCP connection to " + hostAndPort);
@@ -674,23 +627,18 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
      * @throws XMPPException if establishing a connection to the server fails.
      * @throws SmackException if the server fails to respond back or if there is anther error.
      * @throws IOException
-     * @throws InterruptedException
      */
-    private void initConnection() throws IOException, InterruptedException {
+    private void initConnection() throws IOException {
+        boolean isFirstInitialization = packetReader == null || packetWriter == null;
         compressionHandler = null;
 
         // Set the reader and writer instance variables
         initReaderAndWriter();
 
-        int availableReaderWriterSemaphorePermits = readerWriterSemaphore.availablePermits();
-        if (availableReaderWriterSemaphorePermits < 2) {
-            Object[] logObjects = new Object[] {
-                            this,
-                            availableReaderWriterSemaphorePermits,
-            };
-            LOGGER.log(Level.FINE, "Not every reader/writer threads where terminated on connection re-initializtion of {0}. Available permits {1}", logObjects);
+        if (isFirstInitialization) {
+            packetWriter = new PacketWriter();
+            packetReader = new PacketReader();
         }
-        readerWriterSemaphore.acquire(2);
         // Start the writer thread. This will open an XMPP stream to the server
         packetWriter.init();
         // Start the reader thread. The startup() method will block until we
@@ -911,7 +859,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         if (!config.isCompressionEnabled()) {
             return;
         }
-
+        maybeCompressFeaturesReceived.checkIfSuccessOrWait();
         Compress.Feature compression = getFeature(Compress.Feature.ELEMENT, Compress.NAMESPACE);
         if (compression == null) {
             // Server does not support compression
@@ -962,42 +910,18 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
      *
      * @param e the exception that causes the connection close event.
      */
-    private void notifyConnectionError(final Exception e) {
-        ASYNC_BUT_ORDERED.performAsyncButOrdered(this, new Runnable() {
-            @Override
-            public void run() {
-                // Listeners were already notified of the exception, return right here.
-                if (packetReader.done || packetWriter.done()) return;
+    private synchronized void notifyConnectionError(Exception e) {
+        // Listeners were already notified of the exception, return right here.
+        if ((packetReader == null || packetReader.done) &&
+                (packetWriter == null || packetWriter.done())) return;
 
-                // Report the failure outside the synchronized block, so that a thread waiting within a synchronized
-                // function like connect() throws the wrapped exception.
-                SmackWrappedException smackWrappedException = new SmackWrappedException(e);
-                tlsHandled.reportGenericFailure(smackWrappedException);
-                saslFeatureReceived.reportGenericFailure(smackWrappedException);
-                maybeCompressFeaturesReceived.reportGenericFailure(smackWrappedException);
-                lastFeaturesReceived.reportGenericFailure(smackWrappedException);
+        // Closes the connection temporary. A reconnection is possible
+        // Note that a connection listener of XMPPTCPConnection will drop the SM state in
+        // case the Exception is a StreamErrorException.
+        instantShutdown();
 
-                synchronized (XMPPTCPConnection.this) {
-                    // Within this synchronized block, either *both* reader and writer threads must be terminated, or
-                    // none.
-                    assert ((packetReader.done && packetWriter.done())
-                            || (!packetReader.done && !packetWriter.done()));
-
-                    // Closes the connection temporary. A reconnection is possible
-                    // Note that a connection listener of XMPPTCPConnection will drop the SM state in
-                    // case the Exception is a StreamErrorException.
-                    instantShutdown();
-                }
-
-                Async.go(new Runnable() {
-                    @Override
-                    public void run() {
-                        // Notify connection listeners of the error.
-                        callConnectionClosedOnErrorListener(e);
-                    }
-                }, XMPPTCPConnection.this + " callConnectionClosedOnErrorListener()");
-            }
-        });
+        // Notify connection listeners of the error.
+        callConnectionClosedOnErrorListener(e);
     }
 
     /**
@@ -1010,13 +934,14 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
     }
 
     @Override
-    protected void afterFeaturesReceived() throws NotConnectedException, InterruptedException, SecurityRequiredByServerException {
+    protected void afterFeaturesReceived() throws NotConnectedException, InterruptedException {
         StartTls startTlsFeature = getFeature(StartTls.ELEMENT, StartTls.NAMESPACE);
         if (startTlsFeature != null) {
             if (startTlsFeature.required() && config.getSecurityMode() == SecurityMode.disabled) {
-                SecurityRequiredByServerException smackException = new SecurityRequiredByServerException();
+                SmackException smackException = new SecurityRequiredByServerException();
                 tlsHandled.reportFailure(smackException);
-                throw smackException;
+                notifyConnectionError(smackException);
+                return;
             }
 
             if (config.getSecurityMode() != ConnectionConfiguration.SecurityMode.disabled) {
@@ -1067,8 +992,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
 
     protected class PacketReader {
 
-        private final String threadName = "Smack Reader (" + getConnectionCounter() + ')';
-
         XmlPullParser parser;
 
         private volatile boolean done;
@@ -1083,15 +1006,9 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             Async.go(new Runnable() {
                 @Override
                 public void run() {
-                    LOGGER.finer(threadName + " start");
-                    try {
-                        parsePackets();
-                    } finally {
-                        LOGGER.finer(threadName + " exit");
-                        XMPPTCPConnection.this.readerWriterSemaphore.release();
-                    }
+                    parsePackets();
                 }
-            }, threadName);
+            }, "Smack Reader (" + getConnectionCounter() + ")");
          }
 
         /**
@@ -1311,11 +1228,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                                 LOGGER.info(XMPPTCPConnection.this
                                                 + " received closing </stream> element."
                                                 + " Server wants to terminate the connection, calling disconnect()");
-                                ASYNC_BUT_ORDERED.performAsyncButOrdered(XMPPTCPConnection.this, new Runnable() {
-                                    @Override
-                                    public void run() {
-                                        disconnect();
-                                    }});
+                                disconnect();
                             }
                         }
                         break;
@@ -1344,8 +1257,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
     protected class PacketWriter {
         public static final int QUEUE_SIZE = XMPPTCPConnection.QUEUE_SIZE;
 
-        private final String threadName = "Smack Writer (" + getConnectionCounter() + ')';
-
         private final ArrayBlockingQueueWithShutdown<Element> queue = new ArrayBlockingQueueWithShutdown<>(
                         QUEUE_SIZE, true);
 
@@ -1391,15 +1302,9 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             Async.go(new Runnable() {
                 @Override
                 public void run() {
-                    LOGGER.finer(threadName + " start");
-                    try {
-                        writePackets();
-                    } finally {
-                        LOGGER.finer(threadName + " exit");
-                        XMPPTCPConnection.this.readerWriterSemaphore.release();
-                    }
+                    writePackets();
                 }
-            }, threadName);
+            }, "Smack Writer (" + getConnectionCounter() + ")");
         }
 
         private boolean done() {
@@ -1450,12 +1355,11 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             instantShutdown = instant;
             queue.shutdown();
             shutdownTimestamp = System.currentTimeMillis();
-            if (shutdownDone.isNotInInitialState()) {
-                try {
-                    shutdownDone.checkIfSuccessOrWait();
-                } catch (NoResponseException | InterruptedException e) {
-                    LOGGER.log(Level.WARNING, "shutdownDone was not marked as successful by the writer thread", e);
-                }
+            try {
+                shutdownDone.checkIfSuccessOrWait();
+            }
+            catch (NoResponseException | InterruptedException e) {
+                LOGGER.log(Level.WARNING, "shutdownDone was not marked as successful by the writer thread", e);
             }
         }
 
@@ -1610,16 +1514,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         private void drainWriterQueueToUnacknowledgedStanzas() {
             List<Element> elements = new ArrayList<>(queue.size());
             queue.drainTo(elements);
-            for (int i = 0; i < elements.size(); i++) {
-                Element element = elements.get(i);
-                // If the unacknowledgedStanza queue is full, then bail out with a warning message. See SMACK-844.
-                if (unacknowledgedStanzas.remainingCapacity() == 0) {
-                    StreamManagementException.UnacknowledgedQueueFullException exception = StreamManagementException.UnacknowledgedQueueFullException
-                            .newWith(i, elements, unacknowledgedStanzas);
-                    LOGGER.log(Level.WARNING,
-                            "Some stanzas may be lost as not all could be drained to the unacknowledged stanzas queue", exception);
-                    return;
-                }
+            for (Element element : elements) {
                 if (element instanceof Stanza) {
                     unacknowledgedStanzas.add((Stanza) element);
                 }
@@ -1824,32 +1719,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         stanzaAcknowledgedListeners.clear();
     }
 
-    /**
-     * Add a Stanza dropped listener.
-     * <p>
-     * Those listeners will be invoked every time a Stanza has been dropped due to a failed SM resume. They will not get
-     * automatically removed. If at least one StanzaDroppedListener is configured, no attempt will be made to retransmit
-     * the Stanzas.
-     * </p>
-     *
-     * @param listener the listener to add.
-     * @since 4.3.3
-     */
-    public void addStanzaDroppedListener(StanzaListener listener) {
-        stanzaDroppedListeners.add(listener);
-    }
-
-    /**
-     * Remove the given Stanza dropped listener.
-     *
-     * @param listener the listener.
-     * @return true if the listener was removed.
-     * @since 4.3.3
-     */
-    public boolean removeStanzaDroppedListener(StanzaListener listener) {
-        return stanzaDroppedListeners.remove(listener);
-    }
-
     /**
      * Add a new Stanza ID acknowledged listener for the given ID.
      * <p>

smack-tcp/src/test/java/org/jivesoftware/smack/tcp/PacketWriterTest.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2014-2019 Florian Schmaus
+ * Copyright 2014 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,9 +49,11 @@ public class PacketWriterTest {
     @Test
     public void shouldBlockAndUnblockTest() throws InterruptedException, BrokenBarrierException, NotConnectedException, XmppStringprepException {
         XMPPTCPConnection connection = new XMPPTCPConnection("user", "pass", "example.org");
-        final PacketWriter pw = connection.packetWriter;
+        final PacketWriter pw = connection.new PacketWriter();
+        connection.packetWriter = pw;
+        connection.packetReader = connection.new PacketReader();
         connection.setWriter(new BlockingStringWriter());
-        connection.packetWriter.init();
+        pw.init();
 
         for (int i = 0; i < XMPPTCPConnection.PacketWriter.QUEUE_SIZE; i++) {
             pw.sendStreamElement(new Message());

version.gradle

@@ -1,15 +1,9 @@
 allprojects {
 	ext {
-		shortVersion = '4.3.4'
+		shortVersion = '4.3.1'
 		isSnapshot = true
-		// When using dynamic versions for those, do *not* use [1.0,
-		// 2.0), since this will also pull in 2.0-alpha1. Instead use
-		// [1.0, 1.0.99].
-		// See also:
-		// - https://issues.apache.org/jira/browse/MNG-6232
-		// - https://issues.igniterealtime.org/browse/SMACK-858
-		jxmppVersion = '[0.6, 0.6.999]'
-		miniDnsVersion = '[0.3, 0.3.999]'
+		jxmppVersion = '0.6.3'
+		miniDnsVersion = '0.3.2'
 		smackMinAndroidSdk = 9
 	}
 }