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Prevent race condition after stream resumption 

New stanzas sent directly after stream resumption might have been added
to unacknowledgedStanzas before the old unacknowledged stanzas
are resent. This caused new stanzas to be sent twice and later led
to a StreamManagementCounterError.

Fixes SMACK-786
This commit is contained in:
Dmitry Deshevoy 2017-11-16 17:30:16 +03:00
parent 0da3ebf385
commit 230a226424
1 changed files with 3 additions and 2 deletions
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5
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
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@ -1155,8 +1155,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
if (!smSessionId.equals(resumed.getPrevId())) {
throw new StreamIdDoesNotMatchException(smSessionId, resumed.getPrevId());
}
// Mark SM as enabled and resumption as successful.
smResumedSyncPoint.reportSuccess();
// Mark SM as enabled
smEnabledSyncPoint.reportSuccess();
// First, drop the stanzas already handled by the server
processHandledCount(resumed.getHandledCount());
@ -1172,6 +1171,8 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
if (!stanzasToResend.isEmpty()) {
requestSmAcknowledgementInternal();
}
// Mark SM resumption as successful
smResumedSyncPoint.reportSuccess();
LOGGER.fine("Stream Management (XEP-198): Stream resumed");
break;
case AckAnswer.ELEMENT: