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

["Weiwei Yang (JIRA)" <ji...@apache.org>]

Weiwei Yang created HADOOP-13628:
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             Summary: 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


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,

{code}
curl --header "Accept:application/json" http://${RM_HOST}/conf?name=yarn.nodemanager.aux-services

{"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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