FairScheduler can wait for JobInProgress lock while holding JobTracker lock
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Key: MAPREDUCE-1995
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1995
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: contrib/fair-share
Affects Versions: 0.21.0
Reporter: Scott Chen
Assignee: Scott Chen
Fix For: 0.22.0
{code}
JobInProgress.getTaskInProgress() (Locks JobInProgress)
LocalityLevel.fromTask()
FairScheduler.updateLastMapLocalityLevel()
FairScheduler.assignTasks()
JobTracker.heartbeat() (Locks JobTracker)
{code}
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