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From "Neelesh Srinivas Salian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4522) DBOutputFormat Times out on large batch inserts
Date Thu, 24 Sep 2015 16:38:04 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906610#comment-14906610
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Neelesh Srinivas Salian commented on MAPREDUCE-4522:
----------------------------------------------------

[~jarusn], is this still an issue? Would you have time to look at this and provide a patch?


> DBOutputFormat Times out on large batch inserts
> -----------------------------------------------
>
>                 Key: MAPREDUCE-4522
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4522
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task-controller
>    Affects Versions: 0.20.205.0
>            Reporter: Nathan Jarus
>              Labels: newbie
>
> In DBRecordWriter#close(), progress is never updated. In large batch inserts, this can
cause the reduce task to time out due to the amount of time it takes the SQL engine to process
that insert. 
> Potential solutions I can see:
> Don't batch inserts; do the insert when DBRecordWriter#write() is called (awful)
> Spin up a thread in DBRecordWriter#close() and update progress in that. (gross)
> I can provide code for either if you're interested. 



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