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Do not re-use the Socket after connect() failed
Fixes SMACK-724.
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@ -579,6 +579,10 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
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throw new UnknownHostException(host);
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}
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innerloop: while (inetAddresses.hasNext()) {
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// Create a *new* Socket before every connection attempt, i.e. connect() call, since Sockets are not
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// re-usable after a failed connection attempt. See also SMACK-724.
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socket = socketFactory.createSocket();
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final InetAddress inetAddress = inetAddresses.next();
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final String inetAddressAndPort = inetAddress + " at port " + port;
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LOGGER.finer("Trying to establish TCP connection to " + inetAddressAndPort);
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