@rjotwani-211490215,

The error message regarding the supervisor_status file can be ignored.  We will fix the code that generates that error sometime in the future.

The message that indicates the cause of the formatting failure is:

Running in non-interactive mode, and data appears to exist in Storage Directory /dfs/nn.
 Not formatting.

It may be you have some old data in /dfs/nn.  If you are sure you do not need what is in /dfs/nn you can copy it to another location or delete it.  Just be sure you don't need/want whatever is there.