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https://issues.apache.org/jira/browse/HIVE-8218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14143681#comment-14143681
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Thejas M Nair commented on HIVE-8218:
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Adding comment from [~jdere] in HIVE-8094
I think you're right about your comment about FunctionRegistry.mFunctions and
HS2. So all users would be able to see the temp functions that have been
created in HS2. I suspect you may not be able to use them however, if the jar
has not been added to the session's classloader then the actual MR tasks may
not be able to resolve UDF classes.
> function registry shared across sessions in HiveServer2
> -------------------------------------------------------
>
> Key: HIVE-8218
> URL: https://issues.apache.org/jira/browse/HIVE-8218
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2, UDF
> Reporter: Thejas M Nair
>
> FunctionRegistry.mFunctions is static. That mean that in HS2 case, all users
> will have same set of valid udfs. Ie, add/delete jar by one user would affect
> the namespace of other users.
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