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https://issues.apache.org/jira/browse/MAPREDUCE-4346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401143#comment-13401143
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Arun C Murthy commented on MAPREDUCE-4346:
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IAC, it seems the implementation could be improved a fair bit by removing the
inner loop - put the job states in a HashSet and check for existence, rather
than an inner loop.
> Adding a refined version of JobTracker.getAllJobs() and exposing through the
> JobClient
> --------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4346
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4346
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv1
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Attachments: MAPREDUCE-4346.patch, MAPREDUCE-4346_rev2.patch,
> MAPREDUCE-4346_rev3.patch
>
>
> The current implementation for JobTracker.getAllJobs() returns all submitted
> jobs in any state, in addition to retired jobs. This list can be long and
> represents an unneeded overhead especially in the case of clients only
> interested in jobs in specific state(s).
> It is beneficial to include a refined version where only jobs having specific
> statuses are returned and retired jobs are optional to include.
> I'll be uploading an initial patch momentarily.
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