I'm getting the following error message below when reaching Step 5: Save Cuboid Statistics 

Any ideas or suggestions? Below is the error and after are steps I've tried to fix.

java.io.IOException: fail to find the statistics file in base dir: hdfs://
at org.apache.kylin.engine.mr.steps.SaveStatisticsStep.doWork(SaveStatisticsStep.java:78)
at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:164)
at org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:70)
at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:164)
at org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:114)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

The system is Centos 7, Hadoop 2.8.5, Hive 2.3.4, HBase 1.4.8, Kylin 2.5.2 - all installed from tar 

DFS/Yarn all seem to be working appropriately.  No DFS errors and is not in safe mode.

Hive is working correctly and source tables are populated with data and SQL tests seem OK.

HBase seems working OK. Its only installed/used for Kylin so even after re-installing Kylin had installed its meta-data just fine.

Kylin's web UI comes up OK. The data model, cube, and processing are all done via the Web UI and no errors other than the one above.

I looked at the GITHUB sources where the error message comes from and its not creating the statistics directory and cannot get the statistics files (they're not created)

In the DFS/Hadoop logs I see some messages around statistics and the job ID in the HDFS URL but nothing that shows me where to fix something.

Any thoughts, ideas, or experiences to share would be greatly appreciated!