Example Oozie workflow submitted fails with ClassNotFound exception

[#1]

PROBLEM :

The example workflow submitted by users was failing with the below ClassNotFound exceptions

java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.oozie.example.SampleMapper not found

ROOT CAUSE :

These classes are found in oozie-examples-<version>.jar file, which is expected to be present in the lib folder of the job.

RESOLUTION :

Add the oozie-examples-<version>.jar file to the lib folder of the job and then submit the job.