Daryn Sharp created MAPREDUCE-5096:
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Summary: Deprecate ability to not cancel tokens when job completes
Key: MAPREDUCE-5096
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5096
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: job submission
Affects Versions: 2.0.0-alpha, 0.23.0, 3.0.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
MR provides a config {{mapreduce.job.complete.cancel.delegation.tokens}} and an
api {{Job#setCancelDelegationTokenUponJobCompletion}} to disable canceling
tokens when a job completes. This functionality appears to only be a
workaround for the RM's inability to track tokens are being used by multiple
apps. Hence, w/o this setting, oozie & pig jobs will fail after the first
sub-job completes and the tokens are cancelled.
YARN-503 properly tracks tokens used by multiple jobs, which likely negates the
need to specify not canceling tokens.
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