Client failover fails to reconnect if a previous attempted reconnection has 
failed 'late' in the connection start process.
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                 Key: QPID-3912
                 URL: https://issues.apache.org/jira/browse/QPID-3912
             Project: Qpid
          Issue Type: Bug
          Components: Java Client
    Affects Versions: 0.17
            Reporter: Keith Wall
            Priority: Minor


A client uses failover to allow their client to reconnect to a second broker in 
the event of failure of the primary. 

There is a defect in the Qpid Java client's failover code that means if an 
attempted reconnection fails 'late' in the connection start process, then the 
AMQConnection _closed flag get set permanently to true and this prevents all 
future use of the AMQConnection object.  By 'late' I mean a failure after the 
TCP/IP connection has been successfully established - such as an authentication 
or authorisation problem that causes the Broker to decide to close the 
connection.

The problem affects both 0-10 and 0-8..0-9-1 code paths.






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