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https://issues.apache.org/jira/browse/MAPREDUCE-4729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488729#comment-13488729
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Robert Joseph Evans commented on MAPREDUCE-4729:
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The patch looks good to me. I like how we short circuit the reading of the
history file because we know that what we want to read is in a single chunk.
However, I am a bit conflicted about where the parsing of the job history file
is happening. I kind of feel that it should go in the recovery service. In
this case we are only doing a partial recovery, not a full recovery. I can see
in the future we would want to add in other things to the partial recovery,
like when/if we add in a summary of the history file for fast reading it would
be nice to propagate that to the next file no matter what happens so that the
history server can show a full view of what is happened in the application.
But, I am fine with it the way it is and if you feel strongly the other way
feel free to check it in as is +1.
> job history UI not showing all job attempts
> -------------------------------------------
>
> Key: MAPREDUCE-4729
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4729
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobhistoryserver
> Affects Versions: 0.23.3
> Reporter: Thomas Graves
> Assignee: Vinod Kumar Vavilapalli
> Attachments: MAPREDUCE-4729-20121031.txt
>
>
> We are seeing a case where a job runs but the AM is running out of memory in
> the first 3 attempts. The job eventually finishes on the 4th attempt. When
> you go to the job history UI for that job, it only shows the last attempt.
> This is bad since we want to see why the first 3 attempts failed.
> The RM web ui shows all 4 attempts.
> Also I tested this locally by running "kill" on the app master and in that
> case the history server UI does show all attempts.
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