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https://issues.apache.org/jira/browse/SPARK-17707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15545213#comment-15545213
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Sean Owen commented on SPARK-17707:
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Yeah I see that, but, the thing is, if this were true then spark-submit would
just about never finish, and it does in all the tests harnesses. I just tried
it and can't reproduce with SparkPi locally or on YARN, on 1.6 or 2.0. It's got
to be something in your setup, like a non-daemon thread started by a dependent
library? use kill -QUIT on the driver to dump its threads and see what's still
running.
> 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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