Keith Wall created QPID-7199:
--------------------------------

             Summary: Port startup/shutdown should await 
registration/deregistration of OP_ACCEPT
                 Key: QPID-7199
                 URL: https://issues.apache.org/jira/browse/QPID-7199
             Project: Qpid
          Issue Type: Improvement
          Components: Java Broker
            Reporter: Keith Wall


Port startup currently may claim the port is listening before the port is 
actually bound and accepting connection.  On stop, the close of the server 
socket races with the deregistering of the server socket from the selector.

Refactor start and stop so that the Port's activation step does not complete 
until the server socket is registered on the selector with OP_ACCEPT, and at 
shutdown, the closing of the server socket channel should not occur until after 
the socket registering on the selector has been removed.  We can achieve this 
using our established {{ListenableFuture}} patterns.





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