Rob Godfrey created QPID-4673:
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             Summary: [Java Broker AMQP 1.0] Potential for deadlock when 
draining AMQP 1.0 subscriptions
                 Key: QPID-4673
                 URL: https://issues.apache.org/jira/browse/QPID-4673
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
    Affects Versions: 0.20
            Reporter: Rob Godfrey
            Assignee: Rob Godfrey
             Fix For: 0.21


There is a potential for deadlock between the locks on the connection endpoint 
and the subscription object in the java broker when running in the AMQP 1.0 
codepath.  Instead of locking the subscription object the methods should 
instead take the lock from the link (which is the same as the connection 
endpoint lock).

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