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From "Mike Drob (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-507) Large amount of ranges can prevent job from kicking off
Date Tue, 22 Jan 2013 23:38:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13560175#comment-13560175
] 

Mike Drob commented on ACCUMULO-507:
------------------------------------

Can you clear the ranges from the conf after the splits are generated? Not sure how it's done
now, but individual tasks should be able to reconstruct what they need from the split metadata,
and then there's no reason to pass around all the ranges to each mapper.
                
> Large amount of ranges can prevent job from kicking off
> -------------------------------------------------------
>
>                 Key: ACCUMULO-507
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-507
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client
>    Affects Versions: 1.3.5
>            Reporter: John Vines
>            Assignee: Billie Rinaldi
>            Priority: Minor
>              Labels: mapreduce
>             Fix For: 1.5.0
>
>
> We use the various ranges a user provides to create splits. Those get read when the job
is submitted by the client. On the client side, those ranges are used to get all of the splits,
and then the job is started. If the configuration is too large, the job will fail to submit
(this size is configurable, but that's besides the point). We should look into clearing the
ranges out of the jobconf if it's large to prevent this error, since at this point the ranges
are no longer needed in the configuration.

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