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Date: Thu, 24 Sep 2009 01:34:16 -0700 (PDT)
From: "Steve Loughran (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-679) XML-based metrics as JSP servlet
 for JobTracker
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759063#action_12759063 ] 

Steve Loughran commented on MAPREDUCE-679:
------------------------------------------

-1 to anything too fancy in the way of content generation
+1 to adding a couple of XSLs at the root of the webapps, so that XML status pages can be presented in a human readable form. 

> XML-based metrics as JSP servlet for JobTracker
> -----------------------------------------------
>
>                 Key: MAPREDUCE-679
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-679
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: jobtracker
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>             Fix For: 0.21.0
>
>         Attachments: example-jobtracker-completed-job.xml, example-jobtracker-running-job.xml, MAPREDUCE-679.2.patch, MAPREDUCE-679.3.patch, MAPREDUCE-679.4.patch, MAPREDUCE-679.5.patch, MAPREDUCE-679.6.patch, MAPREDUCE-679.7.patch, MAPREDUCE-679.patch
>
>
> In HADOOP-4559, a general REST API for reporting metrics was proposed but work seems to have stalled. In the interim, we have a simple XML translation of the existing JobTracker status page which provides the same metrics (including the tables of running/completed/failed jobs) as the human-readable page. This is a relatively lightweight addition to provide some machine-understandable metrics reporting.

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