Varun Saxena commented on YARN-5577:

Sorry [~rohithsharma], I was on leave so didn't commit it. Will do so shortly.
I will commit it to trunk as its documentation related change. Will be brought 
in ATSv2 branch when we do trunk rebase.

> [Atsv2] Document object passing in infofilters with an example
> --------------------------------------------------------------
>                 Key: YARN-5577
>                 URL: https://issues.apache.org/jira/browse/YARN-5577
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: timelinereader, timelineserver
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>              Labels: documentation
>         Attachments: YARN-5577.patch
> In HierarchicalTimelineEntity, setparent/addChild allows to set parent/child 
> entities at INFO level. The key is an string and value as an object. 
> Like below, for YARN_CONTAINER entity parent entity set for application.
> {code}
>        "type": "YARN_APPLICATION",
>        "id": "application_1471931266232_0024"
>      }
> {code}
> But to use infofilter on entity type YARN_CONTAINER for an specific 
> applicationId, IIUC there is no way to pass object as value in infofilter. 
> To make easier retrieval either
> # publish parent/child entity id and type as string rather that object like 
> below
> {code}
> "SYSTEM_INFO_PARENT_ENTITY_ID":"application_1471931266232_0024"
> {code}
> OR
> # Add ability to provide object as filter with below format like 
> (id eq application_1471931266232_0024))}}
> I believe 2nd approach will be well applicable for any entities. But I am not 
> sure does HBase supports such a custom filters while scanning a table. 
> 1st approaches will be much easier to change. 

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