WebSocket ping timeouts and audio drift in AppFoundry Cognigy integration

Running into a persistent issue with WebSocket stability in our Genesys Cloud AppFoundry bot built with NICE Cognigy. The connection drops roughly every 45-60 seconds, triggering a reconnect loop. This causes noticeable audio latency spikes for the end user, making the conversation feel disjointed.

We’ve implemented the standard keep-alive mechanism using the ping and pong frames as per the WebSocket spec. The backend sends a ping every 30 seconds. If a pong isn’t received within 5 seconds, the client disconnects. Here’s the relevant Kotlin snippet handling the WebSocket lifecycle:

val websocket = OkHttpClient.Builder()
 .pingInterval(30, TimeUnit.SECONDS)
 .build()
 .newWebSocket(request, object : WebSocketListener() {
 override fun onOpen(webSocket: WebSocket, response: Response) {
 Log.d(TAG, "WebSocket connected")
 }
 
 override fun onClosed(webSocket: WebSocket, code: Int, reason: String) {
 Log.w(TAG, "WebSocket closed: code=$code, reason=$reason")
 // Reconnect logic here
 }
 })

The logs show code=1006 (abnormal closure) frequently. The reason string is empty. I’ve checked the Genesys Cloud logs and see no corresponding errors on the server side. The AppFoundry instance is in the same region as the Genesys Cloud org, so latency shouldn’t be a major factor.

Is there a specific configuration in the Genesys Cloud WebSocket endpoint or the Cognigy connector that might be interfering with the ping/pong cycle? I’ve tried increasing the ping interval to 45 seconds, but the drops still happen, just slightly less frequently. The audio latency seems to correlate directly with these reconnect events. Any ideas on what could be causing the abrupt closures without a proper close frame?

Looks like you’re fighting the default socket timeout. The standard 30s ping often clashes with the Genesys Cloud AppFoundry gateway settings, which might be dropping idle connections faster than your pong arrives.

Try increasing the ping interval to 45 seconds and adding a heartbeat message in the payload, not just the frame. the earlier post’s WebSocket implementation sometimes ignores empty pings if the connection isn’t actively streaming media.

// Inside your Cognigy bot logic or Node.js wrapper
ws.on('open', () => {
 setInterval(() => {
 // Send a text frame, not just a binary ping
 if (ws.readyState === WebSocket.OPEN) {
 ws.send(JSON.stringify({ type: 'heartbeat', ts: Date.now() }));
 }
 }, 45000); // 45s interval
});

Also check your VPC endpoint policies. If you’re routing through a custom endpoint, ensure it allows websocket.connect and websocket.send. The audio drift usually stops once the reconnect loop breaks.

Are you handling the close event in Cognigy to prevent the loop?

Cause: The gateway drops stale connections before the pong arrives, and the client retries immediately.

Solution: Increase the interval to 15s and add a small delay to the reconnect logic.

socket.on('close', () => setTimeout(() => connect(), 2000));