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https://issues.apache.org/jira/browse/SPARK-17406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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cen yuhai updated SPARK-17406:
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    Attachment: timeline2.png

> Event Timeline will be very slow when there are very executor events
> --------------------------------------------------------------------
>
>                 Key: SPARK-17406
>                 URL: https://issues.apache.org/jira/browse/SPARK-17406
>             Project: Spark
>          Issue Type: Improvement
>          Components: Web UI
>    Affects Versions: 1.6.2, 2.0.0
>            Reporter: cen yuhai
>            Priority: Minor
>         Attachments: timeline1.png, timeline2.png
>
>
> The job page will be too slow to open when there are very executor 
> events(added or removed). I found that in ExecutorsTab file, executorIdToData 
> will not remove elements, it will increase all the time.



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