Hive UDF --Class Not Found Error

abhijnan_kundu — Tue, 19 Jun 2018 08:36:06 GMT

Hi Experts,

Can anyone please help me with below error?

I am writing a small code to understand how UDF works. The java code is as below:

package UDF;

import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.Text;

@SuppressWarnings("deprecation")
public class MyUpper extends UDF{

public Text evaluate(final Text s){
if (s==null){return null;}
return new Text(s.toString().toUpperCase());
}
}

//Class path of above class is: /Hive/src/UDF/MyUpper.java

I have created a jar file for this class as test.jar and added the jar in hive.

hive> ADD JAR test.jar;
Added [test.jar] to class path
Added resources: [test.jar]

Now I am trying to create a temporary function upper by typecasting the java function MyUpper. Below is my command.

create temporary function upper as 'Hive/src/UDF/MyUpper.java';

or I have tried below command also.

create temporary function upper as 'Hive/src/UDF/MyUpper.java';

Both the commands above is giving me error as below:

FAILED: Class Hive.src.UDF.MyUpper.java not found
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.FunctionTask

Re: Hive UDF --Class Not Found Error

vmurakami — Tue, 19 Jun 2018 09:31:55 GMT

Hey @Abhijnan Kundu!
Did you tried to create like this?

CREATE TEMPORARY FUNCTION myupper as 'udf.myupper';

Hope this helps

Re: Hive UDF --Class Not Found Error

abhijnan_kundu — Wed, 20 Jun 2018 08:05:16 GMT

That worked! Thanks a lot Sir!

Re: Hive UDF --Class Not Found Error

vmurakami — Wed, 20 Jun 2018 08:38:08 GMT

You're welcome! 🙂

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