Hi C* users,

I just upgrade a 12 node test cluster from 1.1.6 to 1.2.1. What I noticed from nodetool ring was that the new upgraded nodes only saw each other as Normal and the rest of the cluster which was on 1.1.6 as Down. Vise versa was true for the nodes running 1.1.6. They saw each other as Normal but the 1.2.1 nodes as down. I don't see a note in upgrade docs that this would be an issue. Has anyone else observed this problem? 

In the debug logs I could see messages saying attempting to connect to node IP and then saying it is down.