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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8524) Allow users to get source of a Configuration parameter
Date Thu, 21 Jun 2012 21:17:42 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J updated HADOOP-8524:
----------------------------

       Resolution: Fixed
    Fix Version/s: 2.0.1-alpha
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Thanks Robert. Committed to branch-2 and trunk.
                
> Allow users to get source of a Configuration parameter
> ------------------------------------------------------
>
>                 Key: HADOOP-8524
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8524
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 2.0.0-alpha
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Trivial
>             Fix For: 2.0.1-alpha
>
>         Attachments: HADOOP-8524.patch, HADOOP-8524.patch, HADOOP-8524.patch
>
>
> When we load the various XMLs via the Configuration class, the source of the XML file
(filename) is usually kept in the Configuration class but not exposed programmatically. It
is presently exposed as comments such as "Loaded from mapred-site.xml" in the XML dump/serialization
but can't be accessed otherwise (Via the Configuration API).
> For debugging/etc. purposes, it may be useful to expose this safely (such as an API for
"where did this property come from?" queries for a specific property, via an API.

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