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https://issues.apache.org/jira/browse/HIVE-6672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941230#comment-13941230
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Jason Dere commented on HIVE-6672:
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[~rhbutani] Is this a bug that would be able to get into Hive-0.13?
> JARs loaded by permanent functions don't work properly with HiveServer2
> -----------------------------------------------------------------------
>
> Key: HIVE-6672
> URL: https://issues.apache.org/jira/browse/HIVE-6672
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2, UDF
> Reporter: Jason Dere
> Assignee: Jason Dere
> Attachments: HIVE-6672.1.patch
>
>
> Permanent functions which specify JAR files to load do not seem to work
> properly with HiveServer2. While the function can be created and see with
> SHOW FUNCTIONS, doing DESCRIBE FUNCTION or using the UDF in a query results
> in java.lang.ClassNotFoundException.
> It looks like the JAR is only added to the classloader of the very first
> thread which references the UDF. Subsequent threads will have a different
> class loader which may not have loaded the JAR, but because the UDF is
> already in the FunctionRegistry these threads do not attempt to load the
> resources for the UDF.
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