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Re: try to fix hadoop streaming bug - MapReduce - [mail # dev]
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...It looks like your jar's MANIFEST file is missing the Main Class attribute. It may have something to do with how you created the updated jar you are using. Hadoop is tryin...
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Author: Robert Evans,
2012-06-14, 13:33
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Re: Idle nodes with terasort and MRv2/YARN (0.23.1) - MapReduce - [mail # user]
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...Trevor, The best way to know what the configs were for your job is to look it up on the web UI. Once you have selected the job you want there should be a Con figuration lin...
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Author: Robert Evans,
2012-05-31, 14:22
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Re: Hadoop optimization for Lustre FS - MapReduce - [mail # dev]
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...Zam, http://wiki.apache.org/hadoop/HowToContribute is a wiki that can tell you i n more detail the steps you need to do for this. In general though to push the patch upstream you...
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Author: Robert Evans,
2012-05-16, 09:54
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Re: Terasort - MapReduce - [mail # user]
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...Jeff, Inside the MR AM there are a number of priorities given to the various task s request when handing them to the RM for scheduling. Map tasks have a hig her priority than red...
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Author: Robert Evans,
2012-05-11, 15:10
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Re: max 1 mapper per node - MapReduce - [mail # user]
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...Yes adding in more resources in the scheduling request would be the ideal s olution to the problem. But sadly that is not a trivial change. The initi al solution I suggested is a...
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Author: Robert Evans,
2012-05-10, 13:29
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Re: max 1 mapper per node - MapReduce - [mail # user]
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...Either plugins or configuration options would be possible to do. The real question is what is the use case for this, and is that use case big enough to warrant it being par...
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Author: Robert Evans,
2012-05-09, 16:10
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Re: Building first time - MapReduce - [mail # dev]
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...http://wiki.apache.org/hadoop/HowToContribute is the best place to start. Checking the code in through git will not trigger a jenkins build, unless y ou have a special setup that goes...
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Author: Robert Evans,
2012-05-09, 13:51
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Re: Cleanup after a Job - MapReduce - [mail # user]
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...That really depends on the API that you are using. In the newer API o.a.h. mapreduce.OutputFormat.getOutputCommitter returns the output committer to u se. In the older API, which...
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Author: Robert Evans,
2012-05-01, 15:06
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Re: Cleanup after a Job - MapReduce - [mail # user]
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...Either abortJob or commitJob will be called for all jobs. AbortJob will be called if the job has failed. CommitJob will be called if it succeeded. The purpose of the...
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Author: Robert Evans,
2012-05-01, 14:06
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Re: max 1 mapper per node - MapReduce - [mail # user]
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...Radim, You would want to modify the application master for this, and it is likely to be a bit of a hack because the RM scheduler itself is not really designe d for this. Yo...
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Author: Robert Evans,
2012-04-27, 15:30
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