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https://issues.apache.org/jira/browse/MAPREDUCE-3387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171309#comment-13171309
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Vinod Kumar Vavilapalli commented on MAPREDUCE-3387:
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Cool, this looks good. +1.
> A tracking URL of N/A before the app master is launched breaks oozie
> --------------------------------------------------------------------
>
> Key: MAPREDUCE-3387
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3387
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Critical
> Attachments: MR-3387.txt, MR-3387.txt, MR-3387.txt
>
>
> When oozie launches a map/reduce job it retrieves the tracking URL of that
> job to display in its own UI. Previously this tracking URL did not change
> except when the job completed. Currently the URL starts out as N/A and then
> changes to the real URL once the AppMaster launches. This breaks oozie, as
> oozie expects to be able to get that information quickly and get back to
> processing other requests.
> Because the web app proxy is now available we can maintain backwards
> compatibility by instead of returning N/A we can return the URL of the proxy
> for that application. This relies on the fact that the application master's
> UI will display the correct thing for the URI http://<host>:<port>/, which MR
> and others now do.
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