WebRTC handshake fails at 100 concurrent threads

Voice & Telephony
1

Just noticed that the WebSocket handshake drops immediately when JMeter threads exceed 100 from Singapore. Running JMeter 5.6.2 with standard OAuth tokens. The /api/v2/webrtc/token endpoint returns 200, but the subsequent socket connection fails with 401 Unauthorized.

  1. Generate tokens for 100 users via /api/v2/webrtc/token
  2. Start JMeter test plan with 100 concurrent threads
  3. Observe immediate 401 errors on WebSocket upgrade