void clusterHeartbeat ( String clusterId , UpdateServerHeartbeat updateSelf , UpdateRackHeartbeat updateRack , UpdatePodSystem updatePod , long sequence ) { if ( startUpdate ( updateRack , updatePod ) ) { getHeartbeat ( ) . clusterHeartbeat ( clusterId , updateSelf , updateRack , updatePod , sequence ) ; } }
Sends a cluster heartbeat message if the update has changed or it s time for a periodic heartbeat .