[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-883) Bug in failover with multiple consumers on same queue
[ http://jira.jboss.com/jira/browse/JBMESSAGING-883?page=comments#action_12... ]
Clebert Suconic commented on JBMESSAGING-883:
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I don't mean to use JIRA as forum, but I wanted to register this other "possible
solution".
mergeIn would put messages on some sort of Limbo during server side failover.
Later when client failovers are happening, recoverDelivery would recover messages from
Limbo..
After a timeout (2 minutes default over a configurable property?) the limbo is merged into
the main queue, giving enought time to all clients to perform their recoveries.
If any recoverDelivery happens after that... we will just throw an exception... per
JBMESSAGING-1006.
We won't need any high watermark being sent over JGroups for this.
Bug in failover with multiple consumers on same queue
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Key: JBMESSAGING-883
URL: http://jira.jboss.com/jira/browse/JBMESSAGING-883
Project: JBoss Messaging
Issue Type: Bug
Affects Versions: 1.2.0.CR1
Reporter: Tim Fox
Assigned To: Tim Fox
Priority: Critical
Fix For: 2.0.0 Beta 1
If you have two connections with a consumer each on the same queue, and one of the
consumers has consumed a message transactionally but not committed it.
Then when failover occurs, if the second connection fails over first then it might
"grab" the message before session::recoverDeliveries kicks in for the other
connection.
This means the message can get delivered more than once.
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