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Sqoop >> mail # dev >> How to compile sqoop

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How to compile sqoop
I  compiled branch-1.4.2 of  sqoop  with the  command below.
           ant jar-all -Dhadoopverion=20
and the result is totally successful.

When I  try to import some data from oracle database using the sqoop that I
built ,  I got the exception : "Exception in thread "main"
java.lang.IncompatibleClassChangeError: Found class
org.apache.hadoop.mapreduce.JobContext, but interface was expected."

I cant get the right result when run the same command using the sqoop from
the org and my hadoop version is  hadoop-0.20.2-cdh3u2.

So, my question is how should I compile the sqoop to work with my hadoop.

Thanks & Regards.