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https://issues.apache.org/jira/browse/QPID-4745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13687245#comment-13687245
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Andrew Stitcher commented on QPID-4745:
---------------------------------------

I think the new qpidd-p0.py has a mistake - the command line it uses is:

qpidd --socket-fd <n> --disable-listen tcp --port <port of fd n>

I think the --port <...> is in error is seems to try to listen to the same port 
as the socket it was passed in!

Also I think that for the python system tests it would make more sense to make 
this a qpidd launching class that is used as part of the test setup. This would 
create a socket pair and pass one end to the broker and pass the other to the 
tests to use directly (I think this last part will need a small amount of 
implementation in the python code).
                
> qpidd --port 0 sometimes fails with 'Can't bind to port 0.0.0.0:49337: 
> Address already in use (qpid/sys/posix/Socket.cpp:206)' 
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-4745
>                 URL: https://issues.apache.org/jira/browse/QPID-4745
>             Project: Qpid
>          Issue Type: Improvement
>          Components: C++ Clustering
>    Affects Versions: 0.22
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>            Priority: Minor
>
> Many of the tests use "qpidd --port=0" to start a broker on an available port.
> Thhis sporadically fails with: Can't bind to port 0.0.0.0:49337: Address 
> already in use (qpid/sys/posix/Socket.cpp:206)
> Many HA tests use --port=0 to start a broker on an available port, but then 
> need to shutdown and restart the broker _on the same port_. This is not safe, 
> on a busy system it is possible for another process  to take the port between 
> the time the broker is shut down and the time it is restarted.
> See also https://bugzilla.redhat.com/show_bug.cgi?id=906277

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