NullPointerException in Reggie during destroy
---------------------------------------------

                 Key: RIVER-225
                 URL: https://issues.apache.org/jira/browse/RIVER-225
             Project: River
          Issue Type: Bug
          Components: com_sun_jini_reggie
    Affects Versions: jtsk_2.1
            Reporter: Thomas Vinod Johnson
            Priority: Minor


Bugtraq ID [6377953|http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6377953]
Reggie has a workaround for Thread.interrrupt() not interrupting 
MulticastSocket.receive() on all paltforms.  The workaround is to attempt to 
close the socket in the interrupt() method of MuticastThread.  If Reggie is 
configured with DiscoveryManagement.NO_GROUPS, the MulticastThread will be 
created and started, but it won't set a socket, so when interrupt() is called 
on this thread at destroy time, a NullPointerException will be thrown.  Whether 
the workaround is still necesarry or not should be investigated as well.

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