Hi just to follow up on this, I have now solved the problem.   There were two things that I needed to do:   1. In addition to adding oozie.libpath to my job.properties,  I also needed to include oozie.use.system.libpath=true   2. Before I was using the following line to add files to the DistributedCache:      FileStatus[] status = fs.listStatus("/application/lib"); if (status != null) { for (int i = 0; i < status.length; ++i) { if (!status[i].isDir()) { DistributedCache.addFileToClassPath(status[i].getPath(), job.getConfiguration(), fs); } } }   This appeared to be causing a classpath issue because it was adding hdfs://hostname before the hdfs path.   Now I am using the following to remove that and only add the absolute hdfs path: FileStatus[] status = fs.listStatus("/application/lib"); if (status != null) { for (int i = 0; i < status.length; ++i) { if (!status[i].isDir()) { Path distCachePath = new Path(status[i].getPath().toUri().getPath()); DistributedCache.addFileToClassPath(distCachePath, job.getConfiguration(), fs); } } }       Thankyou to those that replied to my original query for pointing me in the right direction.   Andrew ... View more