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https://issues.apache.org/jira/browse/QPID-6389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326724#comment-14326724
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ASF subversion and git services commented on QPID-6389:
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Commit 1660763 from [~gsim] in branch 'qpid/trunk'
[ https://svn.apache.org/r1660763 ]
QPID-6389: ensure source/target is null when responding to attach requests in
which they are also null
> [C++ Broker] [AMQP 1.0] consumer attach with a null source can lead to
> unexpected error in resulting detach
> -----------------------------------------------------------------------------------------------------------
>
> Key: QPID-6389
> URL: https://issues.apache.org/jira/browse/QPID-6389
> Project: Qpid
> Issue Type: Bug
> Components: C++ Broker
> Affects Versions: 0.31
> Reporter: Robbie Gemmell
> Assignee: Gordon Sim
>
> Upon a client attaching a durable consumer link with a null source (not null
> address), qpidd responds with an attach containing a non-null source with
> null address, then sends a closing detach with an error indicating no source
> was specfied. The message "[Protocol] error Error on attach: No source
> specified!" is output on the broker console.
> From the spec, I would expect this to have resulted in either:
> * A successfull attach to an existing \[possibly detached\] link, with the
> response source indicating the related terminus details.
> * Returning an attach with a null source, and then a closing detach without
> an error, to indicate lack of a matching link.
> This behaviour seems to be described at
> http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transport-v1.0-os.html#doc-idp315568
> with Fig 2.33 in particular being related, albeit for a producing link.
> The JMS clients (old and new) currently do this to 'look up' durable
> subscriptions by attaching a link with a null source (only during unsubscribe
> currently, but in future also during subscriber open/creation verification as
> well), and monitoring the source value in the attach response from the broker.
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