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https://issues.apache.org/jira/browse/QPID-8496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Rudyy resolved QPID-8496.
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Resolution: Fixed
> Randomly hit "unknown QBB implementation" error
> -----------------------------------------------
>
> Key: QPID-8496
> URL: https://issues.apache.org/jira/browse/QPID-8496
> Project: Qpid
> Issue Type: Bug
> Components: Broker-J
> Affects Versions: qpid-java-broker-8.0.2, qpid-java-broker-8.0.3
> Reporter: Lisa Hong
> Assignee: Alex Rudyy
> Priority: Major
> Fix For: qpid-java-broker-8.0.4
>
> Attachments: UnknownQBB_callstack, proton.log
>
>
> Hi team,
> I'm running qpid java broker with modelVersion8.0. And the client is
> qpid-proton with python. Unfortunately, my producer will randomly hit this
> "unknown QBB implementation" error thus failing with on_connection_error.
> Could you please help to advice what could be the root cause? The error call
> stack could be found from attachment.
> I'm suspending some null buffer is provided for this
> QpidByteBufferFactory.concatenate method. But I have no idea why it could
> happen. Would you please help to figure out? Thank you so much!
> *Proton client version: 0.32.0*
> *Qpid broker J version: 8.0*
> Regards,
> Lisa
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