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https://issues.apache.org/jira/browse/MAPREDUCE-4824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated MAPREDUCE-4824:
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Attachment: MAPREDUCE-4824.patch
> I'm concerned that this might blow up different schedulers in different ways.
I don't think that's a problem since the code change only affects job
submission, which kicks in before scheduling code is run.
> Maybe we need to do an 'if' check during recovery and not throw an
> IOException?
I had another look at this and came up with a new patch. Does it look better?
The Hadoop 2 change sounds like the right approach. At first I thought we
didn't need the property in Hadoop 2, due to MAPREDUCE-2702, but actually it
would allow users to mark a job as non-recoverable on a per-instance basis. It
would build on YARN-128.
> Provide a mechanism for jobs to indicate they should not be recovered on
> restart
> --------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4824
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4824
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: mrv1
> Affects Versions: 1.1.0
> Reporter: Tom White
> Assignee: Tom White
> Attachments: MAPREDUCE-4824.patch, MAPREDUCE-4824.patch,
> MAPREDUCE-4824.patch, MAPREDUCE-4824.patch
>
>
> Some jobs (like Sqoop or HBase jobs) are not idempotent, so should not be
> recovered on jobtracker restart. MAPREDUCE-2702 solves this problem for MR2,
> however the approach there is not applicable for MR1, since even if we only
> use the job-level part of the patch and add a isRecoverySupported method to
> OutputCommitter, there is no way to use that information from the JT (which
> initiates recovery), since the JT does not instantiate OutputCommitters - and
> it shouldn't since they are user-level code. (In MR2 it's OK since the MR AM
> calls the method.)
> Instead, we can add a MR configuration property to say that a job is not
> recoverable, and the JT could safely read this from the job conf.
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