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Posted to mapreduce-issues@hadoop.apache.org by "Robert Joseph Evans (JIRA)" <ji...@apache.org> on 2012/07/10 17:29:34 UTC

[jira] [Updated] (MAPREDUCE-4423) Potential infinite fetching of map output

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Joseph Evans updated MAPREDUCE-4423:
-------------------------------------------

    Summary: Potential infinite fetching of map output  (was: Potential infinet fetching of map output)
    
> Potential infinite fetching of map output
> -----------------------------------------
>
>                 Key: MAPREDUCE-4423
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4423
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.3, 2.0.1-alpha, 3.0.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>
> Inside Fetcher.java there are a few cases where an error can happen and the corresponding map task is not marked as a fetch failure.  One of these is if the Shuffle server returns a malformed result.
> MAPREDUCE-3992 makes this case a lot less common, but it is still possible.  IF the shuffle handler always returns a malformed result, but a OK response the Fetcher will never stop trying to fetch those results. 

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