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https://issues.apache.org/jira/browse/SPARK-28657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-28657.
-------------------------------
Fix Version/s: 3.0.0
2.4.5
Resolution: Fixed
Issue resolved by pull request 25389
[https://github.com/apache/spark/pull/25389]
> Fix currentContext Instance failed sometimes
> --------------------------------------------
>
> Key: SPARK-28657
> URL: https://issues.apache.org/jira/browse/SPARK-28657
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Environment:
>
> Reporter: hong dongdong
> Assignee: hong dongdong
> Priority: Minor
> Fix For: 2.4.5, 3.0.0
>
> Attachments: warn.jpg
>
>
> When run spark on yarn, I got
> {code:java}
> // java.lang.ClassCastException: org.apache.hadoop.ipc.CallerContext$Builder
> cannot be cast to scala.runtime.Nothing$
> {code}
> !warn.jpg!
> {{Utils.classForName return Class[Nothing], I think it should be defind as
> Class[_] to resolve this issue}}
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