GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/10042
[SPARK-12049] [CORE] User JVM shutdown hook can cause deadlock at shutdown
Avoid potential deadlock with a user app's shutdown hook thread by more
narrowly synchronizing access to 'hooks'
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-12049
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10042.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10042
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commit d22cffa867d4614617cc1d1194046bb253cbcd99
Author: Sean Owen <[email protected]>
Date: 2015-11-30T14:42:36Z
Avoid potential deadlock with a user app's shutdown hook thread by more
narrowly synchronizing access to 'hooks'
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