[HADOOP-600] Race condition in JobTracker updating the task tracker's status while declaring it lost

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.1
• Fix Version/s: 0.10.1
• Assignee: Arun Murthy
• Reporter: Owen O'Malley
• Created: 12/Oct/06 16:50
• Updated: 02/May/13 02:29
• Resolved: 08/Jan/07 19:43

Description

There was a case where the JobTracker lost track of a set of tasks that were on a task tracker. It appears to be a race condition because the ExpireTrackers thread doesn't lock the JobTracker while updating the state. The fix would be to build a list of dead task trackers and then lock the job tracker while updating their status.

Issue Links

• depends upon: HADOOP-815 Investigate and fix the extremely large memory-footprint of JobTracker