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https://issues.apache.org/jira/browse/MAPREDUCE-2299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12998575#comment-12998575
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Tim Yates commented on MAPREDUCE-2299:
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Devaraj,
On our clusters, we get these errors because those links take us to pages
served by the _TaskTracker_ instead of the JobTracker. In our setup, the
machines that run the TaskTrackers aren't directly visible to the outside world
(at least through the domain names used internally by Hadoop). Thus, the
browser can't connect, although the JobTracker running on the admin machine
can. We sometimes work around this by running a browser on the admin machine,
although that is inconvenient.
Could something similar be happening in your case? Can you connect to the
machines referenced in those URLs by other means, with ping or SSH for example?
> In the Job Tracker UI -> task details page, machine and logs links are
> navigating to page not found error.
> ----------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-2299
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2299
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Affects Versions: 0.20.2
> Reporter: Devaraj K
>
> 1. In the page showing All task attempts-On clicking of machine link is
> navigating to page not found error.
> 2. In the page showing All task attempts-On clicking of Task logs Link is
> navigating to page not found error.
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