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https://issues.apache.org/jira/browse/HDFS-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haohui Mai resolved HDFS-7239.
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Resolution: Won't Fix
It turns out that JMX is pretty good at providing such information. Closing
this as won't fix.
> Create a servlet for HDFS UI
> ----------------------------
>
> Key: HDFS-7239
> URL: https://issues.apache.org/jira/browse/HDFS-7239
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> Currently the HDFS UI gathers most of its information from JMX. There are a
> couple disadvantages:
> * JMX is also used by management tools, thus Hadoop needs to maintain
> compatibility across minor releases.
> * JMX organizes information as <key, value> pairs. The organization does not
> fit well with emerging use cases like startup progress report and nntop.
> This jira proposes to introduce a new servlet in the NN for the purpose of
> serving information to the UI.
> It should be viewed as a part of the UI. There is *no* compatibility
> guarantees for the output of the servlet.
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