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Posted to mapreduce-dev@hadoop.apache.org by "Karam Singh (Created) (JIRA)" <ji...@apache.org> on 2012/04/03 17:08:23 UTC
[jira] [Created] (MAPREDUCE-4100) Sometimes gridmix emulates data
larger much larger then acutal counter for map only jobs
Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs
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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
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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[jira] [Resolved] (MAPREDUCE-4100) Sometimes gridmix emulates data
larger much larger then acutal counter for map only jobs
Posted by "Amar Kamat (Resolved) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-4100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amar Kamat resolved MAPREDUCE-4100.
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Tags: gridmix compression-emulation map-only-jobs
Resolution: Fixed
Fix Version/s: 0.24.0
Assignee: Amar Kamat
Release Note: Bug fixed in compression emulation feature for map only jobs.
Hadoop Flags: Reviewed
I just committed this to trunk. Thanks Ravi for the review.
> 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
> Assignee: Amar Kamat
> Priority: Minor
> Fix For: 0.24.0
>
> 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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