Smack 4.3.3

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Merge tag '4.3.3'

Smack 4.3.3

build.gradle

@@ -113,6 +113,15 @@ allprojects {
 		version += '-SNAPSHOT'
 	}
 
+	test {
+		// Enable full stacktraces of failed tests. Especially handy
+		// for environments like Travis.
+		testLogging {
+			events "failed"
+			exceptionFormat "full"
+		}
+	}
+
 	ext.sharedManifest = manifest {
 		attributes('Implementation-Version': version,
 				   'Implementation-GitRevision': ext.gitCommit,

resources/releasedocs/changelog.html

@@ -141,6 +141,24 @@ 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

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

@@ -266,6 +266,11 @@ 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

@@ -111,6 +111,7 @@ import org.jivesoftware.smack.provider.ExtensionElementProvider;
 import org.jivesoftware.smack.provider.NonzaProvider;
 import org.jivesoftware.smack.provider.ProviderManager;
 import org.jivesoftware.smack.sasl.core.SASLAnonymous;
+import org.jivesoftware.smack.util.Async;
 import org.jivesoftware.smack.util.DNSUtil;
 import org.jivesoftware.smack.util.Objects;
 import org.jivesoftware.smack.util.PacketParserUtils;
@@ -357,6 +358,9 @@ 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).
@@ -449,6 +453,12 @@ 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.
@@ -467,12 +477,11 @@ 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();
 
@@ -480,9 +489,12 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
             // 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();
             }
+        } catch (SmackException | IOException | XMPPException | InterruptedException e) {
+            instantShutdown();
+            throw e;
+        }
 
         // Make note of the fact that we're now connected.
         connected = true;
@@ -652,6 +664,9 @@ 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;
 
@@ -834,15 +849,18 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      *
      * @param exception the exception that causes the connection close event.
      */
-    protected final synchronized void notifyConnectionError(Exception exception) {
+    protected final void notifyConnectionError(final Exception exception) {
         if (!isConnected()) {
             LOGGER.log(Level.INFO, "Connection was already disconnected when attempting to handle " + exception,
                             exception);
             return;
         }
 
+        ASYNC_BUT_ORDERED.performAsyncButOrdered(this, () -> {
             currentConnectionException = exception;
+            synchronized (AbstractXMPPConnection.this) {
                 notifyAll();
+            }
 
             for (StanzaCollector collector : collectors) {
                 collector.notifyConnectionError(exception);
@@ -851,19 +869,26 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
             tlsHandled.reportGenericFailure(smackWrappedException);
             saslFeatureReceived.reportGenericFailure(smackWrappedException);
             lastFeaturesReceived.reportGenericFailure(smackWrappedException);
+            // TODO From XMPPTCPConnection. Was called in Smack 4.3 where notifyConnectionError() was part of
+            // XMPPTCPConnection. Create delegation method?
+            // maybeCompressFeaturesReceived.reportGenericFailure(smackWrappedException);
 
             // Closes the connection temporary. A if the connection supports stream management, then a reconnection is
             // possible. Note that a connection listener of e.g. XMPPTCPConnection will drop the SM state in
             // case the Exception is a StreamErrorException.
             instantShutdown();
 
+            Async.go(() -> {
+                // Notify connection listeners of the error.
                 callConnectionClosedOnErrorListener(exception);
+            }, AbstractXMPPConnection.this + " callConnectionClosedOnErrorListener()");
+        });
     }
 
-    protected void instantShutdown() {
+    /**
-        // Default implementation simply calls shutdown(), subclasses may override this.
+     * Performs an unclean disconnect and shutdown of the connection. Does not send a closing stream stanza.
-        shutdown();
+     */
-    }
+    public abstract void instantShutdown();
 
     /**
      * Shuts the current connection down.
@@ -1811,6 +1836,18 @@ 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.

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

@@ -93,17 +93,24 @@ public abstract class SmackException extends Exception {
             return new NoResponseException(sb.toString());
         }
 
-        public static NoResponseException newWith(XMPPConnection connection,
+        @Deprecated
+        // TODO: Remove in Smack 4.4.
+        public static NoResponseException newWith(long timeout,
+                StanzaCollector collector) {
+            return newWith(timeout, collector.getStanzaFilter(), false);
+        }
+
+        public static NoResponseException newWith(long timeout,
                         StanzaCollector collector, boolean stanzaCollectorCancelled) {
-            return newWith(connection, collector.getStanzaFilter(), stanzaCollectorCancelled);
+            return newWith(timeout, collector.getStanzaFilter(), stanzaCollectorCancelled);
         }
 
         public static NoResponseException newWith(XMPPConnection connection, StanzaFilter filter) {
-            return newWith(connection, filter, false);
+            return newWith(connection.getReplyTimeout(), filter, false);
         }
 
-        public static NoResponseException newWith(XMPPConnection connection, StanzaFilter filter, boolean stanzaCollectorCancelled) {
+        public static NoResponseException newWith(long timeout, StanzaFilter filter, boolean stanzaCollectorCancelled) {
-            final StringBuilder sb = getWaitingFor(connection);
+            final StringBuilder sb = getWaitingFor(timeout);
             if (stanzaCollectorCancelled) {
                 sb.append(" StanzaCollector has been cancelled.");
             }
@@ -119,7 +126,10 @@ public abstract class SmackException extends Exception {
         }
 
         private static StringBuilder getWaitingFor(XMPPConnection connection) {
-            final long replyTimeout = connection.getReplyTimeout();
+            return getWaitingFor(connection.getReplyTimeout());
+        }
+
+        private static StringBuilder getWaitingFor(final long replyTimeout) {
             final StringBuilder sb = new StringBuilder(256);
             sb.append("No response received within reply timeout. Timeout was "
                             + replyTimeout + "ms (~"

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

@@ -290,7 +290,7 @@ public class StanzaCollector implements AutoCloseable {
             if (!connection.isConnected()) {
                 throw new NotConnectedException(connection, packetFilter);
             }
-            throw NoResponseException.newWith(connection, this, cancelled);
+            throw NoResponseException.newWith(timeout, this, cancelled);
         }
 
         XMPPErrorException.ifHasErrorThenThrow(result);

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

@@ -198,6 +198,12 @@ 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);
         }

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

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

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

@@ -27,7 +27,6 @@ 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;
@@ -46,13 +45,12 @@ 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 final StanzaListener stanzaListener = new StanzaListener() {
+    private static final StanzaListener ADD_ORIGIN_ID_INTERCEPTOR = new StanzaListener() {
         @Override
         public void processStanza(Stanza stanza) {
-            OriginIdElement.addOriginId((Message) stanza);
+            Message message = (Message) stanza;
+            OriginIdElement.addOriginId(message);
         }
     };
 
@@ -95,7 +93,7 @@ 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(stanzaListener, filter);
+        connection().addStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR, filter);
     }
 
     /**
@@ -103,7 +101,7 @@ public final class StableUniqueStanzaIdManager extends Manager {
      */
     public synchronized void disable() {
         ServiceDiscoveryManager.getInstanceFor(connection()).removeFeature(NAMESPACE);
-        connection().removeStanzaInterceptor(stanzaListener);
+        connection().removeStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR);
     }
 
     /**

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

@@ -24,7 +24,11 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class OriginIdProvider extends ExtensionElementProvider<OriginIdElement> {
 
-    public static final OriginIdProvider TEST_INSTANCE = new OriginIdProvider();
+    public static final OriginIdProvider INSTANCE = new OriginIdProvider();
+
+    // TODO: Remove in Smack 4.4.
+    @Deprecated
+    public static final OriginIdProvider TEST_INSTANCE = INSTANCE;
 
     @Override
     public OriginIdElement parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) {

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

@@ -24,7 +24,11 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class StanzaIdProvider extends ExtensionElementProvider<StanzaIdElement> {
 
-    public static StanzaIdProvider TEST_INSTANCE = new StanzaIdProvider();
+    public static final StanzaIdProvider INSTANCE = new StanzaIdProvider();
+
+    // TODO: Remove in Smack 4.4.
+    @Deprecated
+    public static final StanzaIdProvider TEST_INSTANCE = INSTANCE;
 
     @Override
     public StanzaIdElement parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) {

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

@@ -25,6 +25,7 @@ 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;
@@ -42,7 +43,7 @@ public class StableUniqueStanzaIdTest extends SmackTestSuite {
         assertEquals("alice@wonderland.lit", element.getBy());
         assertXMLEqual(xml, element.toXML().toString());
 
-        StanzaIdElement parsed = StanzaIdProvider.TEST_INSTANCE.parse(TestUtils.getParser(xml));
+        StanzaIdElement parsed = StanzaIdProvider.INSTANCE.parse(TestUtils.getParser(xml));
         assertEquals(element.getId(), parsed.getId());
         assertEquals(element.getBy(), parsed.getBy());
     }
@@ -54,7 +55,7 @@ public class StableUniqueStanzaIdTest extends SmackTestSuite {
         assertEquals("de305d54-75b4-431b-adb2-eb6b9e546013", element.getId());
         assertXMLEqual(xml, element.toXML().toString());
 
-        OriginIdElement parsed = OriginIdProvider.TEST_INSTANCE.parse(TestUtils.getParser(xml));
+        OriginIdElement parsed = OriginIdProvider.INSTANCE.parse(TestUtils.getParser(xml));
         assertEquals(element.getId(), parsed.getId());
     }
 
@@ -81,4 +82,17 @@ 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/muc/MultiUserChat.java

@@ -341,9 +341,10 @@ public class MultiUserChat {
 
         // Setup the messageListeners and presenceListeners *before* the join presence is send.
         connection.addSyncStanzaListener(messageListener, fromRoomGroupchatFilter);
-        connection.addSyncStanzaListener(presenceListener, new AndFilter(fromRoomFilter,
+        StanzaFilter presenceFromRoomFilter = new AndFilter(fromRoomFilter,
                         StanzaTypeFilter.PRESENCE,
-                        PossibleFromTypeFilter.ENTITY_FULL_JID));
+                        PossibleFromTypeFilter.ENTITY_FULL_JID);
+        connection.addSyncStanzaListener(presenceListener, presenceFromRoomFilter);
         // @formatter:off
         connection.addSyncStanzaListener(subjectListener,
                         new AndFilter(fromRoomFilter,
@@ -372,15 +373,27 @@ public class MultiUserChat {
                         )
                     );
         // @formatter:on
+        StanzaCollector presenceStanzaCollector = null;
         Presence presence;
         try {
-            presence = connection.createStanzaCollectorAndSend(responseFilter, joinPresence).nextResultOrThrow(conf.getTimeout());
+            // 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());
         }
         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

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

@@ -18,6 +18,7 @@ package org.jivesoftware.smack.util.dns.javax;
 
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.Hashtable;
 import java.util.List;
 import java.util.logging.Level;
 
@@ -40,6 +41,7 @@ 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
  *
@@ -51,7 +53,9 @@ public class JavaxResolver extends DNSResolver implements SmackInitializer {
 
     static {
         try {
-            dirContext = new InitialDirContext();
+            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);
         }

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

@@ -257,6 +257,15 @@ 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.
@@ -421,10 +430,25 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                 }
             }
         }
-        // (Re-)send the stanzas *after* we tried to enable SM
+        // 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);
             }
+        }
 
         afterSuccessfulLogin(false);
     }
@@ -452,9 +476,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         shutdown(false);
     }
 
-    /**
-     * Performs an unclean disconnect and shutdown of the connection. Does not send a closing stream stanza.
-     */
     @Override
     public synchronized void instantShutdown() {
         shutdown(true);
@@ -492,6 +513,8 @@ 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;
@@ -499,6 +522,16 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         reader = null;
         writer = null;
 
+        initState();
+
+        // Wait for reader and writer threads to be terminated.
+        readerWriterSemaphore.acquireUninterruptibly(2);
+        readerWriterSemaphore.release(2);
+    }
+
+    @Override
+    protected void initState() {
+        super.initState();
         maybeCompressFeaturesReceived.init();
         compressSyncPoint.init();
         smResumedSyncPoint.init();
@@ -784,14 +817,13 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
     }
 
     @Override
-    protected void afterFeaturesReceived() throws NotConnectedException, InterruptedException {
+    protected void afterFeaturesReceived() throws NotConnectedException, InterruptedException, SecurityRequiredByServerException {
         StartTls startTlsFeature = getFeature(StartTls.ELEMENT, StartTls.NAMESPACE);
         if (startTlsFeature != null) {
             if (startTlsFeature.required() && config.getSecurityMode() == SecurityMode.disabled) {
-                SmackException smackException = new SecurityRequiredByServerException();
+                SecurityRequiredByServerException smackException = new SecurityRequiredByServerException();
                 tlsHandled.reportFailure(smackException);
-                notifyConnectionError(smackException);
+                throw smackException;
-                return;
             }
 
             if (config.getSecurityMode() != ConnectionConfiguration.SecurityMode.disabled) {
@@ -1062,7 +1094,11 @@ 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();
+                                    }});
                             }
                         }
                         break;
@@ -1567,6 +1603,32 @@ 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>

version.gradle

@@ -2,6 +2,12 @@ allprojects {
 	ext {
 		shortVersion = '4.4.0-alpha2'
 		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 = '0.7.0-alpha5'
 		miniDnsVersion = '0.4.0-alpha3'
 		smackMinAndroidSdk = 19