HTTP 503 Service Unavailable returned immediately after configuring the Genesys Cloud Data Action webhook to POST to a ServiceNow MID Server endpoint. The payload contains standard conversation attributes, yet the edge node drops the request before it reaches the MID server health check.
The BYOC edge instance is running version 2023-3.0 with 4 vCPU and 8GB RAM allocated. Network traces confirm the edge can resolve the MID server hostname, but the connection times out after 15 seconds. The ServiceNow MID server logs show no incoming TCP handshake attempts, suggesting the drop occurs at the Genesys Cloud edge layer.
Verified that the MID server certificate is trusted by importing the CA bundle into the edge configuration. The issue persists even when reducing the payload size to minimal JSON. Has anyone configured secure webhook outbound traffic from a BYOC edge to an on-prem MID server without using a proxy?
You might want to check at the outbound connection limits on the BYOC edge. The 503 error often occurs when the edge node’s worker threads are saturated, preventing new webhook POST requests from being initiated, even if the target MID server is healthy.
- Check the concurrent outbound HTTP connections in your edge configuration. The default limit might be too low for the volume of data actions triggering.
- Verify the WebSocket connection state from the edge to the Genesys Cloud platform. If the upstream connection is flapping, the edge may drop downstream requests to preserve resources.
- Review the JMeter load profile if this is happening during testing. Ensure you are not exceeding the API throughput limits for data actions, which can cause the edge to throttle or reject requests.
- Inspect the edge logs for “connection pool exhausted” warnings. This usually points to a need for increased thread pool size or better timeout handling in the webhook configuration.