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https://issues.apache.org/jira/browse/HDFS-453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12727161#action_12727161
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Aaron Kimball commented on HDFS-453:
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Attaching new patch. I performed suggestion (2) above. Renaming the page to a
.jspx doesn't seem to work. Jasper considers .jspx files via a completely
separate parser than .jsp ones; one that seems to have trouble with the
presence of {{<% .. %>}} and other JSP-isms. This patch also includes a test
that starts a MiniDFSCluster, retrieves /dfshealth.xml.jsp, uses a SAX parser
to parse the page, and check that the main {{<cluster>..</cluster>}} element is
present.
> XML-based metrics as JSP servlet for NameNode
> ----------------------------------------------
>
> Key: HDFS-453
> URL: https://issues.apache.org/jira/browse/HDFS-453
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Aaron Kimball
> Assignee: Aaron Kimball
> Attachments: HDFS-453.2.patch, HDFS-453.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 NameNode status page which provides the same metrics as the
> human-readable page. This is a relatively lightweight addition to provide
> some machine-understandable metrics reporting.
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