I know this thread is old, but we've hit this BURT twice. Each time when we've upgraded per NA it still bit us. This was a big issue for us due to the total outage for the effected SVM. The last time it hit us we were running DOT C-Mode 8.1.4P1. We just upgraded to 8.2.1P2. I'm curious if you're there now and have been monitoring the CLAM heartbeat since. If so is it normal?
I'm twice bitten and very uneasy on it. I hear more resiliency is even being put in 8.3 so maybe it is behind us.
Last, did NA specifically provide a RCA on what actually caused the failed heartbeats?