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From "Min Zhou (JIRA)" <>
Subject [jira] Commented: (HIVE-322) cannot create temporary udf dynamically, with a ClassNotFoundException
Date Wed, 11 Mar 2009 01:46:50 GMT


Min Zhou commented on HIVE-322:

Files reside in tmpfiles, Jars in tmpjars of hadoop system.  
My thrift server support add/delete file/jar, set, and normal HSQL query now , and the other
commands I think is no need for thrift server. 
I've created another jar, let's move there.

> cannot create temporary udf dynamically, with a ClassNotFoundException 
> -----------------------------------------------------------------------
>                 Key: HIVE-322
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.3.0
>            Reporter: Min Zhou
>            Priority: Blocker
>         Attachments: registerjars-v3.patch, registerjars1.patch, registerjars2.patch
> I found the ClassLoader cannot load my UDF when doing FunctionTask, because the ClassLoader
hasnot append its classpaths on-the-fly yet.
> The ExecDriver' s addToClassPath(String[] newPaths) method is the only entry for ClassLoader
dynamically append its classhpaths (besides hadoop's GenericOptionsParser).
> But that function wasnot called before FunctionTask getting my UDF class by class name.
I think this is the reason why I came across that failure.
> scenario description:
> I set a peroperty in hive-site.xml to configure the classpath of my udf. 
> <property>
>   <name>hive.aux.jars.path</name>
>   <value>/home/hadoop/hdpsoft/hive-auxs/zhoumin.jar</value>
> </property>
> but failed to register it with a ClassNotFoundException when creating udf through the
sql command.
> CREATE TEMPORARY FUNCTION strlen AS 'hadoop.hive.udf.UdfStringLength'
> I'll make a patch soon.

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