Github user jacques-n commented on the pull request:
https://github.com/apache/drill/pull/442#issuecomment-205413400
I'm working on an alternative approach where the coordination queue is
associated with each connection. Upon review, it still needs thread protection
because you have contention between sending threads and the socket thread but
it can be much simpler/cleaner. I'm still getting some test failures but hope
to have a proposal up today.
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