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https://issues.apache.org/jira/browse/MAPREDUCE-5176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13671110#comment-13671110
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Vinod Kumar Vavilapalli commented on MAPREDUCE-5176:
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Looks good. +1. We can do more testing, but will track that in the related
JIRAs.
Feel free to commit it. If you want others to look at it, leave it around. I'll
commit it first thing tomorrow morning if this is still around and no one has
objections.
> Preemptable annotations (to support preemption in MR)
> -----------------------------------------------------
>
> Key: MAPREDUCE-5176
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5176
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Reporter: Carlo Curino
> Assignee: Carlo Curino
> Fix For: 2.0.5-beta
>
> Attachments: MAPREDUCE-5176.1.patch, MAPREDUCE-5176.2.patch,
> MAPREDUCE-5176.3.patch, MAPREDUCE-5176.patch
>
>
> Proposing a patch that introduces a new annotation @Preemptable that
> represents to the framework property of user-supplied classes (e.g., Reducer,
> OutputCommiter). The intended semantics is that a tagged class is safe to be
> preempted between invocations.
> (this is in spirit similar to the Output Contracts of [Nephele/PACT |
> https://stratosphere.eu/sites/default/files/papers/ComparingMapReduceAndPACTs_11.pdf])
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