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https://issues.apache.org/jira/browse/MAPREDUCE-679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758305#action_12758305
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Aaron Kimball commented on MAPREDUCE-679:
-----------------------------------------
The "most correct" way to do this would be to integrate with some Java web
framework's templating engine, which would, given a set of key/value data,
either provide HTML or XML or JSON or a dozen other formats from the same
source. But that is a big change and not something that's just going to come
together overnight. Generating HTML from XML is a reasonable-sounding
alternative.
For now, it's on us to add fields to the JSPX when doing so to the JSP, or vice
versa. Suboptimal, for sure.
> 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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