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From "Robert Joseph Evans (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4089) Hung Tasks never time out.
Date Fri, 30 Mar 2012 21:49:26 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Joseph Evans updated MAPREDUCE-4089:
-------------------------------------------

    Target Version/s: 0.23.2, 2.0.0, trunk  (was: trunk, 2.0.0, 0.23.2)
              Status: Open  (was: Patch Available)
    
> 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
>         Attachments: MR-4089.txt
>
>
> 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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