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Hive, mail # user - UDAF:FAILED: Execution Error

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UDAF:FAILED: Execution Error
Tamil A 2012-09-06, 12:25
Hi Experts,

I have written an UDAF function and followed the below steps.

Step 1:
Export jar file

Step 2:
hive>ADD JAR /userdata/tamil/SumOfColumnTest/AvgOfColumn.jar;
(also tried with hive --auxpath

                      export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:
hive>list jar;

Step 3;
hive>CREATE TEMPORARY FUNCTION avge AS 'com.hadoopbook.hive.UDAFExampleAvg';

but after this got the below error,
FAILED: Execution Error, return code 1 from

is the above procedure i followed is same for UDF and UDAF or some other
changes are to be made for UDAF.
Please help me out,

Thanks & Regards,