NM should send a SIGKILL for completed containers also
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Key: MAPREDUCE-3240
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3240
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2, nodemanager
Affects Versions: 0.23.0
Reporter: Vinod Kumar Vavilapalli
This is to address the containers which exit properly after spawning
sub-processes themselves. We don't want to leave these sub-process-tree or else
they can pillage the NM's resources.
Today, we already have code to send SIGKILL to the whole process-trees (because
of single sessionId resulting from setsid) when the container is alive. We
need to obtain the PID of the containers when they start and use that PID to
send signal for completed containers' case also.
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