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Posted to mapreduce-dev@hadoop.apache.org by "Robert Joseph Evans (Created) (JIRA)" <ji...@apache.org> on 2012/03/30 20:08:26 UTC

[jira] [Created] (MAPREDUCE-4089) Hung Tasks never time out.

Hung Tasks never time out. 
---------------------------

                 Key: MAPREDUCE-4089
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4089
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv2
    Affects Versions: 0.23.2, 2.0.0, trunk
            Reporter: Robert Joseph Evans
            Assignee: Robert Joseph Evans
            Priority: Blocker


The AM will timeout a task through mapreduce.task.timeout only when it does not hear from the task within the given timeframe.  On 1.0 a task must be making progress, either by reading input from HDFS, writing output to HDFS, writing to a log, or calling a special method to inform it that it is still making progress.

This is because on 0.23 a status update which happens every 3 seconds is counted as progress.

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