Chuck Rolke created QPID-4421: --------------------------------- Summary: C++ Broker Issue with reusing link channel Id number too soon Key: QPID-4421 URL: https://issues.apache.org/jira/browse/QPID-4421 Project: Qpid Issue Type: Bug Components: C++ Broker Affects Versions: 0.18 Reporter: Chuck Rolke
Following on to QPID-4392 As you add and remove replicated queues within an HA broker, bridges are opened and closed for each queue. Closing a bridge immediately re-adds the associated channel number into an available pool. As a result, when the old bridge (channel X) is closed it sends a "detach" command to the broker and the new bridge (assigned the same channel X) sends an "attach" command. The broker will eventually respond with a "detached" command which was meant for the original bridge on channel X. Unfortunately, the new bridge on channel X handles this detached command from the broker and flags the bridge as detached. This process can then repeat for several cycles until it break out of the detach/attach/detached race. In addition to the detach/attach/detached race, the immediate re-use of channel numbers appears to create other issues like the following: Nov 2 11:26:40 itcm31 qpidd[12122]: 2012-11-02 11:26:40 [Protocol] error Execution exception: invalid-argument: anonymous.qpid.bridge_session_qpid.replicator-Queue1.b64c23e6-cb01-4297-8935-c12b40 804ae2_84209514-2e58-4fb9-8d37-7c2440f5f144: confirmed < (2+0) but only sent < (0+0) (qpid/SessionState.cpp:154) This issue may be worked around by assigning channel Id numbers from the pool in increasing serial order and not immediately reusing a deallocated Id. Although this does not fix the problem of the race condition it will provide relief. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org