No idea why this is happening,… the /api/v2/oauth2/token endpoint starts returning 401 Unauthorized errors when I push JMeter to 200 concurrent threads. Running from Singapore (Asia/Singapore). The initial auth works fine, but refresh tokens seem to get rejected or rate-limited aggressively during the load spike.
{ "error": "invalid_grant", "error_description": "The refresh token is invalid or has expired" }
Is there a specific limit on token refresh throughput for load testing scenarios? My client ID is standard.