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https://issues.apache.org/jira/browse/MAPREDUCE-679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748023#action_12748023
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Chris Douglas commented on MAPREDUCE-679:
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I'm not arguing against exporting XML APIs- we already do this for listing
paths in the NameNode- but I'd like to have a use case before we commit to
supporting an interface. The aforementioned is an example of an interim, XML
interface: listing for HftpFileSystem, which was added for cross-version
copying while we work on better protocols. Which is why I ask: what is this
for? "XML is widely supported and we have a unit test" is answering a different
question.
> 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
> Attachments: example-jobtracker-completed-job.xml,
> example-jobtracker-running-job.xml, MAPREDUCE-679.2.patch,
> MAPREDUCE-679.3.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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