Why does this setting in the Architect flow cause immediate 403 Forbidden errors when simulating 500 concurrent WhatsApp sessions? I am running a JMeter script to validate the Genesys Cloud messaging throughput under high concurrency. The script hits the /api/v2/bulk/exports endpoint to trigger recordings export for each session. The error response body shows "message":"Access denied" and "code":"forbidden". I have verified that the IAM role attached to the BYOC edge has s3:PutObject permissions. The JMeter config uses a constant throughput timer set to 100 requests per second. The environment is a private US-East-1 region. The issue appears only when the concurrent user count exceeds 400. Below 400 users, the export jobs create successfully with 202 Accepted status. The request headers include the correct x-genesys-authorization token. I have checked the CloudWatch logs for the edge and see no corresponding 4xx errors from the edge proxy itself. The failure seems to originate from the Genesys Cloud platform API gateway. Is there a rate limit or concurrency cap on bulk export initiation for BYOC environments that differs from standard public cloud instances? The documentation mentions API rate limits for general endpoints but does not specify limits for bulk operations during load testing scenarios.
This issue stems from the platform treating the bulk export endpoint as a high-risk operation during peak load. When you hit 500 concurrent sessions, the API gateway likely sees a spike in request volume that triggers automatic throttling or permission revocation for non-standard IAM roles. The 403 error often masks the underlying rate limit issue.
The documentation suggests using a staged approach for bulk operations. Instead of triggering exports for all 500 sessions simultaneously, batch them into groups of 50. In JMeter, this means adding a Sleep sampler or a constant throughput timer to space out the requests.
Here is a quick config snippet for your JMeter thread group:
- Thread Count: 50
- Ramp-Up: 10 seconds
- Loop Count: 10
- Constant Throughput Timer: 60000 (1 req/sec per thread)
This reduces the instantaneous load on the BYOC edge. If the 403 persists, check if your IAM role has the bulk:export:write permission explicitly granted, as some default roles only allow read.