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https://issues.apache.org/jira/browse/YARN-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943741#comment-14943741
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Li Lu commented on YARN-4220:
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Oh Thanks [~varun_saxena]. Having looked at the code I can see we're checking
the preconditions in ApplicationEntityReader. We're obtaining container level
entities from the generic reader but application level entities from the
application entity reader. I think this caused the problem. I thought this was
a feature but it turned out this looks like a bug :).
> [Storage implementation] Support getEntities with only Application id but no
> flow and flow run ID
> -------------------------------------------------------------------------------------------------
>
> Key: YARN-4220
> URL: https://issues.apache.org/jira/browse/YARN-4220
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Li Lu
> Assignee: Li Lu
> Priority: Minor
>
> Currently we're enforcing flow and flowrun id to be non-null values on
> {{getEntities}}. We can actually query the appToFlow table to figure out an
> application's flow id and flowrun id if they're missing. This will simplify
> normal queries.
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