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Amareshwari Sriramadasu commented on HADOOP-5761:
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This should not be an issue after HADOOP-5374 and HADOOP-5247. Both of them got committed
to branch 0.19.2
> JobTracker and TaskTracker enter infinite loop when TaskTracker reports bad taskid
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-5761
> URL: https://issues.apache.org/jira/browse/HADOOP-5761
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Todd Lipcon
>
> If the TaskTracker somehow gets into a state where it has a task in COMMIT_PENDING state
that the JobTracker does not know about, the JobTracker will throw NPEs while processing heartbeats.
Due to HADOOP-3987, this causes the JT and TT to enter an infinite heartbeat loop with no
delays, and the TT fails to make progress.
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