PolyBase Error ...app.MRAppMaster not found

On the HortonWorks community site, we noticed an unusual error relating to the PolyBase pushdown capability and the resulting error:

Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster
 

We have not seen this error, but wanted to include it in our listing of identified PolyBase errors. The user later noted that their solution required a change to the mapred-site.xml file, as follows:

       
 <property> <name>mapreduce.app-submission.cross-platform</name> <value>True</value> </property>
       

You can find the full user thread here:  Yarn ClassPath Value for Polybase Pushdown