Don't fail if zmq is busy

frigate/comms/dispatcher.py

@@ -142,6 +142,7 @@ class Dispatcher:
             )
 
         def handle_update_model_state():
+            if payload:
                 model = payload["model"]
                 state = payload["state"]
                 self.model_state[model] = ModelStatusTypesEnum[state]

frigate/comms/inter_process.py

@@ -65,8 +65,11 @@ class InterProcessRequestor:
 
     def send_data(self, topic: str, data: any) -> any:
         """Sends data and then waits for reply."""
+        try:
             self.socket.send_json((topic, data))
             return self.socket.recv_json()
+        except zmq.ZMQError:
+            return ""
 
     def stop(self) -> None:
         self.socket.close()