Delegation token cancellation shouldn't hold global JobTracker lock
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Key: MAPREDUCE-2452
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2452
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: jobtracker
Reporter: Devaraj Das
Assignee: Devaraj Das
Fix For: 0.23.0
Currently, when the JobTracker cancels a job's delegation token (at the end of
the job), it holds the global lock. This is not desired.
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