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From "Robert Joseph Evans (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2584) Check for serializers early, and give out more information regarding missing serializers
Date Wed, 18 Apr 2012 20:28:42 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Joseph Evans updated MAPREDUCE-2584:
-------------------------------------------

    Target Version/s: 2.0.0, 3.0.0  (was: 0.24.0, 0.23.1)
    
> Check for serializers early, and give out more information regarding missing serializers
> ----------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2584
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2584
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>    Affects Versions: 0.20.2
>            Reporter: Harsh J
>            Assignee: Harsh J
>              Labels: serializers, tasks
>         Attachments: 0.20-security-MAPREDUCE-2584.r5.diff, MAPREDUCE-2584.r2.diff, MAPREDUCE-2584.r3.diff,
MAPREDUCE-2584.r4.diff, MAPREDUCE-2584.r5.diff
>
>
> As discussed on HADOOP-7328, MapReduce can handle serializers in a much better way in
case of bad configuration, improper imports (Some odd Text class instead of the Writable Text
set as key), etc..
> This issue covers the MapReduce parts of the improvements (made to IFile, MapOutputBuffer,
etc. and possible early-check of serializer availability pre-submit) that provide more information
than just an NPE as is the current case.

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