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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-7774) [Qpid JMS Client 0-x] [0-8..0-91] MessageConsumer#receiveNoWait() always returns null after a successful failover
Date Tue, 09 May 2017 16:21:04 GMT
Keith Wall created QPID-7774:
--------------------------------

             Summary: [Qpid JMS Client 0-x] [0-8..0-91] MessageConsumer#receiveNoWait() always
returns null after a successful failover
                 Key: QPID-7774
                 URL: https://issues.apache.org/jira/browse/QPID-7774
             Project: Qpid
          Issue Type: Bug
          Components: Java Client
    Affects Versions: qpid-java-6.1.2, qpid-java-6.0.6, 0.32, 0.22
            Reporter: Keith Wall


If the client fails over when AMQP 0-8..0-91 is in use and the application is using a synchronous
message receiver calling #receiveNoWait(), the application will always receive null.  The
defect is longstanding.  It goes back at least until 0.22.  Other synchronous receive calls,
asynchronous message listeners are unaffected.  The 0-10 path is unaffected too.

The problem is {{org.apache.qpid.client.AMQConnection#isFailingOver}} and org.apache.qpid.client.AMQProtocolHandler#startFailoverThread.
  The former assumes that the failover latch will be nullified after a successful failover
but {{startFailoverThread}} does not organise for this.




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