MapEventFetcherThread should not iterate over jobs that are not localized
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Key: MAPREDUCE-1895
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1895
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Reporter: Amareshwari Sriramadasu
We have seen a scenario of lost trackers on our clusters because of the
following:
TaskLauncher has locked a TaskTracker$RunningJob and doing localizeJob, which
involves DFS operations. Map-event
fetcher has locked TaskTracker.runningJobs map and is waiting to lock the
RunningJob object. TaskTracker offerService
is waiting to lock TaskTracker.runningJobs map, thus failing to send heartbeats
in 10 minutes.
So, I think map-event fetcher should circuit jobs that are not localized.
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