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https://issues.apache.org/jira/browse/SPARK-8705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605646#comment-14605646
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Shixiong Zhu commented on SPARK-8705:
-------------------------------------

A simple fix is don't add {{rect}} s to {{svg}} when {{totalExecutionTime}} is 
0 in 
https://github.com/apache/spark/blob/04ddcd4db7801abefa9c9effe5d88413b29d713b/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala#L599
 

This conflicts with https://github.com/apache/spark/pull/7082 , so I will send 
a PR after pr #7082 is merged.

> Javascript error in the web console when `totalExecutionTime` of a task is 0
> ----------------------------------------------------------------------------
>
>                 Key: SPARK-8705
>                 URL: https://issues.apache.org/jira/browse/SPARK-8705
>             Project: Spark
>          Issue Type: Bug
>          Components: Web UI
>            Reporter: Shixiong Zhu
>
> Because System.currentTimeMillis() is not accurate for tasks that only need 
> several milliseconds, sometimes totalExecutionTime in makeTimeline will be 0. 
> If totalExecutionTime is 0, there will the following error in the console.
> !https://cloud.githubusercontent.com/assets/1000778/8406776/5cd38e04-1e92-11e5-89f2-0c5134fe4b6b.png!



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