Why does the coackroachb github site say Cassandra is not available on DataCenter failure?

Why does the coackroachb github site say Cassandra is not available on DataCenter failure?

(This is a re-post from kanth909 on the google group [OP link])

@kanth909

Where do you see that on that github site? This will help us get you an answer.
Cheers,
Jessica

Resolved with PR #13450