问题
I downloaded PIG 0.14 and did an ant -dhadoopversion=23 jar , but when I used it on Hadoop 2.4 its not working. Is there anything I should do other than just running ant?
Pig is running, but showing errors
ang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
thanks !
回答1:
If you checked out Pig from SVN trunk you can verify the Hadoop version it uses at
$PIG_HOME/ivy/libraries.properties . For the "23" profile it is 2.4.0 .
After you have built Pig from source ( ant -Dhadoopversion=23 ) you can verify whether ivy has retrieved the correct Hadoop jars under $PIG_HOME/build/ivy/lib/Pig .
I suspect that you have a wrong Hadoop version in your PIG_CLASSPATH.
来源：https://stackoverflow.com/questions/26291415/building-apache-pig-for-hadoop-2-4-version