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https://issues.apache.org/jira/browse/HIVE-322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678720#action_12678720
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coderplay edited comment on HIVE-322 at 3/7/09 7:25 AM:
-------------------------------------------------------
it works, now.
hive> register '/home/zhoumin/myudf.jar' ;
OK
Time taken: 0.141 seconds
hive> CREATE TEMPORARY FUNCTION strlen AS 'hadoop.hive.udf.UdfStringLength';
OK
Time taken: 0.062 seconds
was (Author: coderplay):
it works, now.
hive> register '/home/zhoumin/myudf.jar' ;
OK
Time taken: 0.141 seconds
hive> CREATE TEMPORARY FUNCTION strlen AS
'com.taobao.hadoop.hive.udf.UdfStringLength';
OK
Time taken: 0.062 seconds
> cannot create temporary udf dynamically, with a ClassNotFoundException
> -----------------------------------------------------------------------
>
> Key: HIVE-322
> URL: https://issues.apache.org/jira/browse/HIVE-322
> 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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