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https://issues.apache.org/jira/browse/YARN-3431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500755#comment-14500755
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Zhijie Shen commented on YARN-3431:
-----------------------------------

Could be. Or addParent(entity_type, entity_id) is translated to 
info.add("PARENT:" + entity_type, entity_id), and child similarly. I think 
former is better for get a set of children while latter will be good to search 
for single child/parent.

> Sub resources of timeline entity needs to be passed to a separate endpoint.
> ---------------------------------------------------------------------------
>
>                 Key: YARN-3431
>                 URL: https://issues.apache.org/jira/browse/YARN-3431
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: YARN-3431.1.patch, YARN-3431.2.patch, YARN-3431.3.patch
>
>
> We have TimelineEntity and some other entities as subclass that inherit from 
> it. However, we only have a single endpoint, which consume TimelineEntity 
> rather than sub-classes and this endpoint will check the incoming request 
> body contains exactly TimelineEntity object. However, the json data which is 
> serialized from sub-class object seems not to be treated as an TimelineEntity 
> object, and won't be deserialized into the corresponding sub-class object 
> which cause deserialization failure as some discussions in YARN-3334 : 
> https://issues.apache.org/jira/browse/YARN-3334?focusedCommentId=14391059&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14391059.



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