my cuc7 cluster although I could leave a message it was'nt actually being delivered - when i logged there was no message, no mwi etc. Noticed my cluster was showing as both in secondary mode (one should have been primary and i could not change this manually either). A reboot of the boxes fixed this - messages got delivered, mwi worked etc on cluster management for the primary server it showed that the status was changing 'split brain status' (something like that). i assume it was again sorting out its status between primary and secondary (could they be losing contact with eachother??). Seems stable now but am a bit worried as what may have caused this and could it happen again? Why wasn't it delivering the messages ?