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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-7239) Create a servlet for HDFS UI
Date Mon, 05 Jun 2017 20:25:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Haohui Mai resolved HDFS-7239.
------------------------------
    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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