Comment 1 for bug 429651

Google code bug 48 is a direct result of this bug:
http://code.google.com/p/mysql-master-master/issues/detail?id=48

I just ran into the exact same problem. The bas thing about this bug is that mmm_control show thinks everything is peachy, while in reality your cluster is unreachable!
Besides adding that check after the call to add_ip, I think a checker should also be written to ping/mysql connect on the virtual ip. When that fails, there doesn't necessarily have to be anything wrong with the underlying machines, so other checks might not catch that.