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https://issues.apache.org/jira/browse/SPARK-26349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16723219#comment-16723219
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Imran Rashid commented on SPARK-26349:
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I'm working on this

> Pyspark should not accept insecure p4yj gateways
> ------------------------------------------------
>
>                 Key: SPARK-26349
>                 URL: https://issues.apache.org/jira/browse/SPARK-26349
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>    Affects Versions: 3.0.0
>            Reporter: Imran Rashid
>            Priority: Blocker
>
> Pyspark normally produces a secure py4j connection between python & the jvm, 
> but it also lets users provide their own connection.  Spark should fail fast 
> if that connection is insecure.
> Note this is breaking a public api, which is why this is targeted at 3.0.0.  
> SPARK-26019 is about adding a warning, but still allowing the old behavior to 
> work, in 2.x



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