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https://issues.apache.org/jira/browse/SPARK-9596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-9596.
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Resolution: Fixed
Fix Version/s: 1.6.0
Issue resolved by pull request 7931
[https://github.com/apache/spark/pull/7931]
> Avoid reloading Hadoop classes like UserGroupInformation
> --------------------------------------------------------
>
> Key: SPARK-9596
> URL: https://issues.apache.org/jira/browse/SPARK-9596
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Tao Wang
> Assignee: Tao Wang
> Fix For: 1.6.0
>
>
> Some hadoop classes contains global information such as authentication in
> UserGroupInformation. If we load them again in `IsolatedClientLoader`, the
> message they carry will be dropped.
> So we should treat hadoop classes as "shared" too.
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