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https://issues.apache.org/jira/browse/MAPREDUCE-1482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12834926#action_12834926
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Tsz Wo (Nicholas), SZE commented on MAPREDUCE-1482:
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It seems that all RPC api with String parameters have this problem since it
does not prevent the client putting a large string into the parameter value.
> Better handling of task diagnostic information stored in the TaskInProgress
> ---------------------------------------------------------------------------
>
> Key: MAPREDUCE-1482
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1482
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Reporter: Amar Kamat
>
> Task diagnostic information can be very large at times eating up Jobtracker's
> memory. There should be some way to avoid storing large error strings in
> JobTracker.
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