if (repNode.isShutdown() || (message == null)) {
return;
}
repNode.getMasterStatus().assertSync();
MessageOp messageOps = message.getOp();
if (messageOps == Protocol.SHUTDOWN_REQUEST) {
throw processShutdown((ShutdownRequest) message);
}
if (messageOps == Protocol.HEARTBEAT) {
processHeartbeat(replicaFeederChannel,