[jira] [Updated] (HADOOP-13628) Support to retrieve specific property from configuration via REST API

["Mingliang Liu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-13628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mingliang Liu updated HADOOP-13628:
-----------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 3.0.0-alpha2
           Status: Resolved  (was: Patch Available)

I've committed to {{trunk}} branch. We can backport this later to branch-2 if it's needed. Thanks for your contribution, [~cheersyang].

> Support to retrieve specific property from configuration via REST API
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-13628
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13628
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 2.7.3
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>             Fix For: 3.0.0-alpha2
>
>         Attachments: 404_error_browser.png, HADOOP-13628.01.patch, HADOOP-13628.02.patch, HADOOP-13628.03.patch, HADOOP-13628.04.patch, HADOOP-13628.05.patch, HADOOP-13628.06.patch
>
>
> Currently we can use rest API to retrieve all configuration properties per daemon, but unable to get a specific property by name. This causes extra parse work at client side when dealing with Hadoop configurations, and also it's quite over head to send all configuration in a http response over network. Propose to support following a {{name}} parameter in the http request, by issuing
> {code}
> curl --header "Accept:application/json" http://${RM_HOST}/conf?name=yarn.nodemanager.aux-services
> {code}
> get output
> {code}
> {"property"{"key":"yarn.resourcemanager.hostname","value":"${RM_HOST}","isFinal":false,"resource":"yarn-site.xml"}}
> {code}
> This change is fully backwards compatible.



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