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https://issues.apache.org/jira/browse/YARN-6280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15901427#comment-15901427
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Sunil G commented on YARN-6280:
-------------------------------
[~cltlfcjin]
Thanks for the patch.
I think we need to keep the default behavior as it exists from 2.7 onwards. As
[~rohithsharma] suggested, lets have {{hideResourceRequest}} as a query param
instead of {{showResourceRequest}}. By default, we can keep hideResourceRequest
as false. So we will serve apps with ResourceRequests always. If query param
hideResourceRequest is given as true, we will skip it and reply. We can
document and advise to use this filter when issues like this occurs.
> 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
> Attachments: YARN-6280.001.patch, YARN-6280.002.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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