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Posted to mapreduce-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2010/02/11 08:05:28 UTC

[jira] Resolved: (MAPREDUCE-119) JobTracker and TaskTracker enter infinite loop when TaskTracker reports bad taskid

     [ https://issues.apache.org/jira/browse/MAPREDUCE-119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved MAPREDUCE-119.
-----------------------------------

    Resolution: Cannot Reproduce

resolving Cannot Reproduce. I haven't seen this in the wild on 0.20 ever.

> JobTracker and TaskTracker enter infinite loop when TaskTracker reports bad taskid
> ----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-119
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-119
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            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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