Sometimes blocking about test_microphone.py

[YunzhaoLu]

Using this python script to test microphone connecting to websocket server.
https://github.com/alphacep/vosk-server/blob/master/websocket/test_microphone.py
There is blocking (as following) if server side doesn't return response at each data chunk.
while True:
data = await audio_queue.get()
await websocket.send(data)
print (await websocket.recv()) # blocking here waiting for message.

It happened when VAD is applied at server side and no response if data chunk is silent.

[nshmyrev]

Sorry, we do not have VAD. Probably you don't have enough memory on the server and it goes to swap. Try to increase memory.

[YunzhaoLu]

It should not relate to memory. Please see this flow. Server drop the silent chunks, and client waits for response, and never send the next chunk. Thank you.

[nshmyrev]

We do not have VAD in our server, it is probably your custom modification.