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https://issues.apache.org/jira/browse/HIVE-8991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14234082#comment-14234082
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Rui Li commented on HIVE-8991:
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Not sure if it's because how we add hive-exec:
If added dynamically (as application jar), spark loads it with
{{ExecutorURLClassLoader}} and set it as the thread's ContextClassLoader. Then
we hit the NoClassDefFoundError.
If added to {{spark.driver.extraClassPath}}, then it's loaded with the system
class loader and the error is gone.
> Fix custom_input_output_format [Spark Branch]
> ---------------------------------------------
>
> Key: HIVE-8991
> URL: https://issues.apache.org/jira/browse/HIVE-8991
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Rui Li
> Assignee: Rui Li
> Attachments: HIVE-8991.1-spark.patch
>
>
> After HIVE-8836, {{custom_input_output_format}} fails because of missing
> hive-it-util in remote driver's class path.
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