[HIVE-322] cannot create temporary udf dynamically, with a ClassNotFoundException

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Duplicate
• Affects Version/s: 0.3.0
• Component/s: Query Processor
• Assignee: Unassigned
• Reporter: Min Zhou
• Created: 04/Mar/09 05:55
• Updated: 16/Mar/09 08:04
• Resolved: 16/Mar/09 08:03

Description

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.

Issue Links

• is duplicated by: HIVE-338 Executing cli commands into thrift server