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https://issues.apache.org/jira/browse/MAPREDUCE-4705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ravi Prakash reassigned MAPREDUCE-4705:
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Assignee: Jason Lowe (was: Ravi Prakash)
Jason got to it, before I could
> Historyserver links expire before the history data does
> -------------------------------------------------------
>
> Key: MAPREDUCE-4705
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4705
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobhistoryserver, mrv2
> Affects Versions: 0.23.3
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
>
> The historyserver can serve up links to jobs that become useless well before
> the job history files are purged. For example on a large, heavily used
> cluster we can end up rotating through the maximum number of jobs the
> historyserver can track fairly quickly. If a user was investigating an issue
> with a job using a saved historyserver URL, that URL can become useless
> because the historyserver has forgotten about the job even though the history
> files are still sitting in HDFS.
> We can tell the historyserver to keep track of more jobs by increasing
> {{mapreduce.jobhistory.joblist.cache.size}}, but this has a direct impact on
> the responsiveness of the main historyserver page since it serves up all the
> entries to the client at once. It looks like Hadoop 1.x avoided this issue
> by encoding the history file location into the URLs served up by the
> historyserver, so it didn't have to track a mapping between job ID and
> history file location.
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