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Posted to dev@activemq.apache.org by "AR (JIRA)" <ji...@apache.org> on 2014/12/03 19:13:12 UTC

[jira] [Created] (AMQ-5473) Race condition caused by Linkstealing might make durable subs inactive

AR created AMQ-5473:
-----------------------

             Summary: Race condition caused by Linkstealing might make durable subs inactive
                 Key: AMQ-5473
                 URL: https://issues.apache.org/jira/browse/AMQ-5473
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.11.0
            Reporter: AR


Link Stealing creates a new connection and disconnects the old connection. These operations are done concurrently.
New connection triggers addConsumer() for active subscriptions and old connection stop causes removeConsumer() for the same.

Problems:
 * addConsumer() would throw exception that the sub is already active (if remove did not happen before)
 * even if we go past the exception, it will not activate the subs
 * remove consumer may remove subcription even if it had different connection context (created by linkstealing)


Patch attached.



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