NM should handle cleaning up containers when it shuts down ( and kill
containers from an earlier instance when it comes back up after an unclean
shutdown )
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Key: MAPREDUCE-3891
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3891
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2, nodemanager
Affects Versions: 0.23.0
Reporter: Hitesh Shah
Ideally, the NM should wait for a limited amount of time when it gets a
shutdown signal for existing containers to complete and kill the containers (
if we pick an aggressive approach ) after this time interval.
For NMs which come up after an unclean shutdown, the NM should look through its
directories for existing container.pids and try and kill an existing containers
matching the pids found.
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