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https://issues.apache.org/jira/browse/SPARK-3490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14131844#comment-14131844
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Andrew Or commented on SPARK-3490:
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This still needs to be back ported into branch-1.1
> Alleviate port collisions during tests
> --------------------------------------
>
> Key: SPARK-3490
> URL: https://issues.apache.org/jira/browse/SPARK-3490
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: Andrew Or
> Assignee: Andrew Or
> Fix For: 1.2.0
>
>
> A few tests, notably SparkSubmitSuite and DriverSuite, have been failing
> intermittently because we open too many ephemeral ports and occasionally
> can't bind to new ones.
> We should minimize the use of ports during tests where possible. A great
> candidate is the SparkUI, which is not needed for most tests.
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