BYOC Edge Router Drops WebSocket Handshake on Architect Data Action Callback

Voice & Telephony
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Environment runs Genesys Cloud release 24.12 with a single-tenant BYOC setup in AWS us-east-1, but the custom CRM sync flow keeps timing out right after the edge router renews the TLS session. Architect v2.5 throws a 408 Request Timeout on the /api/v2/dataaction/actions endpoint whenever the webhook payload exceeds 45kb, and the platform won’t wait for the Lambda callback to finish processing before dropping the WebSocket handshake. Current workaround involves chunking the payload into three separate POST requests and using a retry policy in Architect, though it’s doing jack all for the real-time queue sync since the edge gateway returns Connection reset by peer the exact millisecond the OAuth token refreshes. {"error_code": 408, "message": "Gateway timeout", "trace_id": "req_9f8a7b6c"}

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Might be worth swapping the synchronous data action for a REST PROXY call instead. genesys-cloud-architect-sdk enforces a hard timeout on the /api/v2/dataaction/actions endpoint. When the payload crosses that 45kb mark, the edge router cuts the WebSocket connection to protect the routing thread.

Tried increasing the webhook timeout in the console. Failed. It’s a platform hard-cap at 12 seconds. Chunking just adds latency and breaks the CRM sync order. Teams don’t usually notice the drop until the queue backs up. Switching to a background SNIPPET action with async: true handles the handoff without blocking the session.

{
 "type": "REST_PROXY",
 "method": "POST",
 "url": "https://your-lambda-url.execute-api.us-east-1.amazonaws.com/sync",
 "async": true,
 "timeoutMs": 15000
}

Payload size hits the limit. Connection drops immediately. What’s the exact X-Genesys-Trace-Id returning in the 408 response?

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http.post('https://api.mypurecloud.com/api/v2/dataaction/actions', JSON.stringify(payload));

Run it through k6 first. The 408 hits when the edge drops the handshake past 12s. Switch to async queue processing instead of blocking the routing thread. Token needs dataaction:write scope. Honestly, payload size won’t matter once you detach the callback.