[MAPREDUCE-1995] FairScheduler can wait for JobInProgress lock while holding JobTracker lock

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 0.21.0
• Fix Version/s: 0.22.0
• Component/s: contrib/fair-share
• Assignee: Scott Chen
• Reporter: Scott Chen
• Created: 05/Aug/10 01:47
• Updated: 05/Aug/10 01:59
• Resolved: 05/Aug/10 01:59

Description

Here is the related code path.

JobInProgress.getTaskInProgress() (Locks JobInProgress)
LocalityLevel.fromTask()
FairScheduler.updateLastMapLocalityLevel()
FairScheduler.assignTasks()
JobTracker.heartbeat() (Locks JobTracker)