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Ran 06 May 2016 04:23PM UTC

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Committed 06 May 2016 04:22PM UTC coverage: 66.919% (+0.004%) from 66.915%

Job # TOX_ENV=py27-cdh-airflow_backend_mysql

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push

travis-ci

Committed by Jeremiah Lowin

Commit Message

Fix corner case with joining processes/queues (#1473)

If a process places items in a queue and the process is joined before the queue is emptied, it can lead to a deadlock under some circumstances. Closes AIRFLOW-61.

See for example: https://docs.python.org/3/library/multiprocessing.html#all-start-methods ("Joining processes that use queues")
http://stackoverflow.com/questions/31665328/python-3-multiprocessing-queue-deadlock-when-calling-join-before-the-queue-is-em
http://stackoverflow.com/questions/31708646/process-join-and-queue-dont-work-with-large-numbers
http://stackoverflow.com/questions/19071529/python-multiprocessing-125-list-never-finishes

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