Handling Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected

Question

I am using CDH4 and have written a MapReduce application using the new mapreduce API. I have compiled it against hadoop-core-1.0.3.jar and when I run it on my Hadoop cluster

Answer 1

For me I found that I was using the wrong version of Hadoop with Avro 1.7.4 (http://www.cloudera.com/content/cloudera/en/documentation/cdh4/v4-2-0/CDH4-Release-Notes/cdh4ki_topic_2_9.html)