Ryota Egashira created OOZIE-2110:
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Summary: cancel delegation token of launcher jobs that stay till
child jobs finish
Key: OOZIE-2110
URL: https://issues.apache.org/jira/browse/OOZIE-2110
Project: Oozie
Issue Type: Bug
Affects Versions: trunk
Reporter: Ryota Egashira
Assignee: Ryota Egashira
Fix For: trunk
set mapreduce.job.complete.cancel.delegation.tokens=true for launcher job that
wait for child jobs to finish (most of actions, pig,hive,java, distcp, etc).
this is currently set to false.
keep mapreduce.job.complete.cancel.delegation.tokens=false for launcher job
that exits right after a child job launched (mapred action), such that it does
not delete delegation token while child job still running.
this change reduce the load on Namenode in terms of the number of tokens it has
to maintain.
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