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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 Thu, 03 Dec 2009 00:37:20 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

New patch to address findbugs and javac warnings:
 - Added a serialVersionUID to ConfServlet (apparently Servlets are serializable)
 - Added some more synchronized blocks in Configuration - was missing some synchronization
while iterating over properties, etc, which was exposed as a side effect of adding some code.

The other findbugs warning was about the catch (Exception) in writeXml, which already existed.
I'd be happy to explicitly catch the thrown XML-related exceptions and rethrow as an IOException,
but I didn't write that patch and didn't want to change it if it were purposefully a RuntimeException.

> 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-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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