[jira] [Created] (OOZIE-2110) cancel delegation token of launcher jobs that stay till child jobs finish

["Ryota Egashira (JIRA)" <ji...@apache.org>]

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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