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Posted to mapreduce-issues@hadoop.apache.org by "Ravi Gummadi (Commented) (JIRA)" <ji...@apache.org> on 2012/04/19 06:23:04 UTC
[jira] [Commented] (MAPREDUCE-4100) Sometimes gridmix emulates data
larger much larger then acutal counter for map only jobs
[ https://issues.apache.org/jira/browse/MAPREDUCE-4100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13257220#comment-13257220 ]
Ravi Gummadi commented on MAPREDUCE-4100:
-----------------------------------------
Patch looks fine to me. +1
> Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs
> ----------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4100
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4100
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/gridmix
> Affects Versions: 1.1.0
> Reporter: Karam Singh
> Priority: Minor
> Attachments: mapreduce-4100-v1.2.patch
>
>
> While running 1400+ jobs trace I encountered this issue.
> For map-only jobs, observed that some Maps generating data of around 9 GB (From HDFS_BYTES_WRITTEN) whereas actual value is around 5GB in trace.
> This can sometimes also cause jobs to fail intermittently.
> Other GridMix version coming be Hadoop-1.1.X and above might also effected
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