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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6408) Add a /conf servlet to dump running configuration
Date Wed, 02 Dec 2009 23:27:20 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HADOOP-6408:
--------------------------------

    Attachment: hadoop-6408.txt

This patch implements a servlet at /conf that dumps the configuration. ?format=xml and ?format=json
are provided (xml is the default).

This also modifies the .writeXml() function of Configuration to include the resource sources
(when available) as xml comments. Eg:

{noformat}
<property>
  <!--Loaded from core-default.xml-->
  <name>fs.s3n.impl</name>
  <value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value>
</property>
{noformat}

I did some slight refactoring there to make things more convenient.

I didn't do an HTML view of this data, since Firefox at least displays the XML pretty readably.
If others would find HTML useful, I'd like to do that in a separate JIRA.

> Add a /conf servlet to dump running configuration
> -------------------------------------------------
>
>                 Key: HADOOP-6408
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6408
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.22.0
>
>         Attachments: hadoop-6408.txt
>
>
> HADOOP-6184 added a command line flag to dump the running configuration. It would be
great for cluster troubleshooting to provide access to this as a servlet, preferably in both
JSON and XML formats. But really, any format would be better than nothing. This should/could
go into all of the daemons.

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