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NPE thrown from NetworkedJob.isComplete even after hadoop job completes succesfully

Question asked by pmandavalli on Sep 15, 2015

I am working on mapr-3.1.0 version.
I encounter Null Pointer Exception when a job is completed successfully.
The stack trace is as below

Exception in thread "main" cascading.flow.FlowException: unhandled exception
    at cascading.flow.BaseFlow.complete(
    at org.apache.hadoop.util.RunJar.main(
Caused by: java.lang.NullPointerException
    at org.apache.hadoop.mapred.JobClient$NetworkedJob.isComplete(
    at cascading.flow.hadoop.planner.HadoopFlowStepJob.internalBlockOnStop(
    at cascading.flow.planner.FlowStepJob.stop(
    at cascading.flow.BaseFlow.internalStopAllJobs(
    at cascading.flow.BaseFlow.access$100(
    at cascading.flow.BaseFlow$

Due to this, the job stops abruptly and I have to kick off successive flows manually.
Any pointers will be a huge help.