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https://issues.apache.org/jira/browse/HIVE-14139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15362930#comment-15362930
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Sergey Shelukhin commented on HIVE-14139:
-----------------------------------------
It is consistent logically, we know about the function but don't load it until
requested. We can just add safety check on removal and not assume it's loaded,
does it make sense?
> NPE dropping permanent function
> -------------------------------
>
> Key: HIVE-14139
> URL: https://issues.apache.org/jira/browse/HIVE-14139
> Project: Hive
> Issue Type: Bug
> Reporter: Rui Li
> Assignee: Rui Li
> Attachments: HIVE-14139.1.patch, HIVE-14139.2.patch,
> HIVE-14139.3.patch
>
>
> To reproduce:
> 1. Start a CLI session and create a permanent function.
> 2. Exit current CLI session.
> 3. Start a new CLI session and drop the function.
> Stack trace:
> {noformat}
> FAILED: error during drop function: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.exec.Registry.removePersistentFunctionUnderLock(Registry.java:513)
> at
> org.apache.hadoop.hive.ql.exec.Registry.unregisterFunction(Registry.java:501)
> at
> org.apache.hadoop.hive.ql.exec.FunctionRegistry.unregisterPermanentFunction(FunctionRegistry.java:1532)
> at
> org.apache.hadoop.hive.ql.exec.FunctionTask.dropPermanentFunction(FunctionTask.java:228)
> at
> org.apache.hadoop.hive.ql.exec.FunctionTask.execute(FunctionTask.java:95)
> at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:197)
> at
> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:100)
> at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1860)
> at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1564)
> at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1316)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1085)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1073)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:232)
> {noformat}
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