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https://issues.apache.org/jira/browse/SPARK-25294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16598975#comment-16598975
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Marcelo Vanzin commented on SPARK-25294:
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It might be hard to cover all cases since kerberos is, well, complicated. But 
there's a lot of ground we can cover by using Hadoop's {{MiniKdc}} in our 
tests. This has been on my "things to take a look at sometime" list for a few 
years...

> Add integration test for Kerberos 
> ----------------------------------
>
>                 Key: SPARK-25294
>                 URL: https://issues.apache.org/jira/browse/SPARK-25294
>             Project: Spark
>          Issue Type: Test
>          Components: Tests
>    Affects Versions: 2.4.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> Some changes may cause Kerberos issues, such as {{Yarn}}, {{Hive}}, {{HDFS}}. 
> we should add tests.
> https://issues.apache.org/jira/browse/SPARK-23789
> https://github.com/apache/spark/pull/21987#issuecomment-417560077



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