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From "Shyam Gavulla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4522) DBOutputFormat Times out on large batch inserts
Date Mon, 29 Feb 2016 17:22:18 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15172182#comment-15172182
] 

Shyam Gavulla commented on MAPREDUCE-4522:
------------------------------------------

Yes, I can make the batch size configurable. I will work on it. 

> 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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