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https://issues.apache.org/jira/browse/QPID-8496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17263903#comment-17263903
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Lisa Hong commented on QPID-8496:
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Hi [~orudyy],
Thank you so much for your reply! I'm using qpid-proton for python as client.
But I didn't see any payload concept in the python client. Does it mean for a
*proton.Message* instance? If that's the case, I think we have always provided
one non-null message for each message send. There's no complex logic in
construct the message. And what is confusing is that this issue happens
randomly. With the same job and same data in our producer, it works for most
cases but might fails once after several runs.
One more information is that the queues we're sending messages to are all
prioritized queues (*the queue type is 'priority'*). Besides, for the
connection, it will send heartbeat every 15s, which is configured with proton
API *Container.connect(heartbeat=15*). But our job usually runs more than 1
minute. So I think this should not be the cause.
So do you have any idea for our case is there any special condition that could
hit this exception?
Thanks again for your help!
Best Regards,
Lisa
> 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
> Reporter: Lisa Hong
> Priority: Major
> Attachments: UnknownQBB_callstack
>
>
> 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!
> Regards,
> Lisa
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