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Date: Thu, 20 Apr 2017 02:52:04 +0000 (UTC)
From: "Jian He (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13048033.1488546091000.1609.1492656724595@Atlassian.JIRA>
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References: <JIRA.13048033.1488546091000@Atlassian.JIRA> <JIRA.13048033.1488546091887@jira-lw-us.apache.org>
Subject: [jira] [Commented] (YARN-6280) Add a query parameter in
 ResourceManager Cluster Applications REST API to control whether or not
 returns ResourceRequest
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archived-at: Thu, 20 Apr 2017 02:52:09 -0000


    [ https://issues.apache.org/jira/browse/YARN-6280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15975952#comment-15975952 ] 

Jian He commented on YARN-6280:
-------------------------------

one minor comment: how about making this generic by adding an param like: unselect="resourceRequests,..", which takes a list of unselected fields.
This is more flexible and can be used to strip off more fields  if there's such use case in future.

> Add a query parameter in ResourceManager Cluster Applications REST API to control whether or not returns ResourceRequest
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6280
>                 URL: https://issues.apache.org/jira/browse/YARN-6280
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager, restapi
>    Affects Versions: 2.7.3
>            Reporter: Lantao Jin
>            Assignee: Lantao Jin
>         Attachments: YARN-6280.001.patch, YARN-6280.002.patch, YARN-6280.003.patch, YARN-6280.004.patch, YARN-6280.005.patch, YARN-6280.006.patch, YARN-6280.007.patch
>
>
> Begin from v2.7, the ResourceManager Cluster Applications REST API returns   ResourceRequest list. It's a very large construction in AppInfo.
> As a test, we use below URI to query only 2 results:
> http://<rm http address:port>/ws/v1/cluster/apps?states=running,accepted&limit=2
> The results are very different:
> ||Hadoop version|Total Character|Total Word|Total Lines|Size||
> |2.4.1|1192|	42|	42|	1.2 KB|
> |2.7.1|1222179|	48740|	48735|	1.21 MB|
> Most RESTful API requesters don't know about this after upgraded and their old queries may cause ResourceManager more GC consuming and slower. Even if they know this but have no idea to reduce the impact of ResourceManager except slow down their query frequency.
> The patch adding a query parameter "showResourceRequests" to help requesters who don't need this information to reduce the overhead. In consideration of compatibility of interface, the default value is true if they don't set the parameter, so the behaviour is the same as now.


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