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https://issues.apache.org/activemq/browse/AMQCPP-256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=52890#action_52890
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Teemu Torma commented on AMQCPP-256:
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Some general observations:
- Using the same concept with message listener fails the same way.
- Without any delay in message processing the problem is very hard to reproduce.
- Using CLIENT_ACKNOWLEDGE works.
- Synchronizing the message receiving and commit makes the problem go away, but
that is not really multi-threaded.
For me it sounds that something in activemq-cpp transaction managements gets
confused based on timing of receiving the message and the commit. I might be
wrong though.
> Transaction has not been started exceptions on the broker with parallel
> transacted sessions
> -------------------------------------------------------------------------------------------
>
> Key: AMQCPP-256
> URL: https://issues.apache.org/activemq/browse/AMQCPP-256
> Project: ActiveMQ C++ Client
> Issue Type: Bug
> Affects Versions: 3.0
> Environment: Ubuntu Jaunty 9.04
> Reporter: Teemu Torma
> Assignee: Timothy Bish
> Priority: Critical
> Attachments: mt-receive.cpp
>
>
> When using parallel transacted sessions and consumers to same queue each
> sharing the same connection, the messages are delivered but the broker 5.2
> gets exceptions
> javax.jms.JMSException: Transaction
> 'TX:de411476-d65d-fff7-1e84-be7c9abd80b5:6' has not been started.
> and some messages are left on the broker even though they were delivered.
> The issue seems to be related to multi-threading, by protecting each
> receive/commit with a lock the error does not happen. I am sorry I don't
> have a test program ready, but it should be easy to reproduce by creating
> multiple transacted session threads with prefetchSize=1 and consuming
> messages, commiting after each message. I have seen this happen both with
> consumers and listeners.
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