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https://issues.apache.org/jira/browse/AMQ-5953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14729316#comment-14729316
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ASF subversion and git services commented on AMQ-5953:
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Commit c7b93d123228a8501e41956493859e581ef0533b in activemq's branch
refs/heads/master from [~gtully]
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=c7b93d1 ]
https://issues.apache.org/jira/browse/AMQ-5953 - transaction broker, fix sync
of xatransaction get with insert
> XA Transaction 'XID:[...]' has not been started. xaErrorCode:-4 on MessageAck
> -----------------------------------------------------------------------------
>
> Key: AMQ-5953
> URL: https://issues.apache.org/jira/browse/AMQ-5953
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.12.0
> Reporter: Gary Tully
> Assignee: Gary Tully
> Fix For: 5.13.0
>
>
> There is a sync issue in TransactionBroker, that can result in contention on
> the xatransaction map.
> The result is a get returning null for something present. So an Ack cannot
> resolve the corresponding transaction.
> The error - transaction not started - xaErrorCode:-4
> Either a resize or unrelated remove op could cause inconsistency and
> presumably allow a transient null.
> Trying to reproduce reliably in a test case is elusive.
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