Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/9946#issuecomment-161754892
@vanzin So the bug is one thing it can actually happen in other ways too.
For instance if someone messes up the node while upgrading the NM during
rolling upgrade. Or it could happen if buts in other resource managers
(standalone, mesos, etc). I'm fine with updating the description but don't
htink its limited to HADOOP-12441.. It should system exit to make sure users
process really exits.
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