Is it ok to have 2 versions of Hadoop in same 4 nodes cluster?
Here's what I have in the panel:
There are 2 versions of datanodes currently live:3.1.1 (3) ,3.1.3 (1)
Should I upgrade 3 nodes to 3.1.3 or downgrade one node to 3.1.1?
The DataNodes should run the same software version as the NameNode.
Any details, explanation or pointers on why this is the case?