During failover clients can cause NPE to occur on the broker.
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                 Key: QPID-1950
                 URL: https://issues.apache.org/jira/browse/QPID-1950
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker, Java Client
    Affects Versions: M4, 0.5
            Reporter: Martin Ritchie


Summary:

During failover NPEs have been seen from the ChannelOpenHandler as the 
virtualHost has not yet been set on the session. 

The Java client should not be able to cause this sort of problem.

This was discovered whilst testing another issue wifh failover.  QPID-1949

The race condition can be seen by editing the test case (as attached) so that 
it attempts to continue to use the connection after failover.

The attached log shows one instance where the NPE occured.




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