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    [ https://issues.apache.org/jira/browse/SPARK-25917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672101#comment-16672101
] 

Apache Spark commented on SPARK-25917:
--------------------------------------

User 'jianjianjiao' has created a pull request for this issue:
https://github.com/apache/spark/pull/22926

> Spark UI's executors page loads forever when memoryMetrics in None. Fix is to JSON ignore
memorymetrics when it is None.
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-25917
>                 URL: https://issues.apache.org/jira/browse/SPARK-25917
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core, Web UI
>    Affects Versions: 2.3.2
>            Reporter: Rong Tang
>            Priority: Critical
>
> Spark UI's executors page loads forever when memoryMetrics in None. Fix is to JSON ignore
memorymetrics when it is None.
> ## How was this patch tested?
> Before fix: (loads forever)
> ![image](https://user-images.githubusercontent.com/1785565/47875681-64dfe480-ddd4-11e8-8d15-5ed1457bc24f.png)
> After fix:
> ![image](https://user-images.githubusercontent.com/1785565/47875691-6b6e5c00-ddd4-11e8-9895-db8dd9730ee1.png)



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