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https://issues.apache.org/jira/browse/SPARK-17707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15532559#comment-15532559
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Sean Owen commented on SPARK-17707:
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I have never observed this. It would mean that anyone running an app that ever
looks at the web UI sees it doesn't finish. Are you sure it's finished?
> Web UI prevents spark-submit application to be finished
> -------------------------------------------------------
>
> Key: SPARK-17707
> URL: https://issues.apache.org/jira/browse/SPARK-17707
> Project: Spark
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Nick Orka
>
> Here are re-production steps:
> 1. create any scala spark application which will work long enough to open the
> application details in Web UI
> 2. run spark-submit command for standalone cluster, like: --master
> spark:\\localhost:7077
> 3. open running application details in Web UI, like: localhost:4040
> 4. spark-submit will never finish, you will have to kill the process
> Cause: The application creates a thread with infinite loop for web UI
> communication and never stops it. The application is waiting for the thread
> to be finished instead, even if you close the web page.
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