502 Bad Gateway returned by Genesys Cloud Architect when invoking a custom Data Action webhook. The endpoint works in Postman but fails consistently after three concurrent requests. Rate limiting headers are not present in the response. Any insights on scaling limits for outbound calls?
The root cause here is the external API endpoint lacking the concurrency handling required for Genesys Cloud’s default webhook burst behavior. When three requests hit simultaneously, the target server likely drops connections or times out, resulting in the 502 error. Postman tests often mask this because they are sequential.
For legal discovery workflows, reliable data transmission is critical. Ensure your endpoint can handle parallel writes without dropping packets.
- Check the target server logs for connection resets or timeout errors during the burst.
- Implement an async queue on the receiver side to buffer incoming webhook payloads.
- Add a retry mechanism in Genesys Architect with exponential backoff (e.g., 1s, 2s, 4s) to handle transient failures gracefully.
- Verify that the payload size does not exceed the target server’s limit, as large JSON blobs can cause gateway timeouts.
Ensure your S3 integration or downstream processor can handle the metadata correctly. If the data is corrupted, the chain of custody is broken. Monitor the retry counts to ensure no data loss occurs during high-concurrency events.