Downgrading Apache Hadoop YARN to MapReduce v1

This post is somewhat dated material.  Several years back, when YARN was first making headways and vendors starting adopting it as part of Hadoop 2.x, there were many times where I needed to downgrade to MapReduce v1.  I had written a lot of stuff for MRV1, and there were times where downgrading was the best approach to getting things back up and running.  For those that may need to, here are my notes for downgrading from YARN to MRv1:

all should be good on localhost:50030 and 50070

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