Following on to
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: 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.
|Transition||Time In Source Status||Execution Times||Last Executer||Last Execution Date|
|99d 1h 36m||1||Chuck Rolke||12/Feb/13 22:15|
|166d 20h 38m||1||Justin Ross||29/Jul/13 19:53|
|Status||Resolved [ 5 ]||Closed [ 6 ]|
|Field||Original Value||New Value|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Fix Version/s||0.19 [ 12322452 ]|
|Resolution||Fixed [ 1 ]|