java.lang.IncompatibleClassChangeError

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    • java.lang.IncompatibleClassChangeError: Found interface > org.apache.hadoop.mapreduce.JobContext, but class was expected at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.setupUdfEnvAndStores(PigOutputFormat.java:235) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.checkOutputSpecs(PigOutputFormat.java:183) at > org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:562) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293)
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