// Create and populate the RPC message
            WitnessHeartbeatMessage message = new WitnessHeartbeatMessage();
            message.setContextHandle(request.getContextHandle());
            message.setSequenceNumber(request.getSequenceNumber());

            // Send the RPC request
            rpcHandle.sendrecv(message);

            // Create response from RPC message results

        try {
            WitnessHeartbeatRequest request = new WitnessHeartbeatRequest();
            request.setRegistrationId(registration.getRegistrationId());
            request.setSequenceNumber(registration.getNextSequenceNumber());

            WitnessHeartbeatResponse response = rpcClient.heartbeat(request);

            if (response != null && response.isSuccess()) {

        try {
            WitnessHeartbeatRequest request = new WitnessHeartbeatRequest();
            request.setRegistrationId(registration.getRegistrationId());
            request.setSequenceNumber(registration.getNextSequenceNumber());
            
            WitnessHeartbeatResponse response = rpcClient.heartbeat(request);
            
            if (response.isSuccess()) {