Trying to understand the root cause of intermittent WebRTC session establishment failures within our Premium App deployment. We are currently integrating a custom softphone client using the Genesys Cloud JavaScript SDK (version 5.4.2) across multiple tenant environments via the AppFoundry platform. The integration relies on standard OAuth 2.0 client credentials for initial authentication, followed by the retrieval of a user access token to initiate media sessions.
The specific issue manifests when attempting to establish a WebRTC connection for outbound calls originating from our application logic. Approximately 15% of session initiation attempts fail during the SDP negotiation phase. The browser console logs indicate a RTCPeerConnection state change to failed without a clear Genesys-specific error code in the primary callback. However, inspecting the network traffic reveals a 408 Request Timeout on the /api/v2/interactions/webchat/sessions endpoint when the underlying transport attempts to handshake with the media relay servers in the us-east-1 region.
WebSocket connection to 'wss://media-relay.us-east-1.genesyscloud.com' failed: Error during WebSocket handshake: net::ERR_CONNECTION_TIMED_OUT
Our architecture utilizes a server-side component to generate the initial offer/answer pairs, which are then passed to the client-side SDK. We have verified that the firewall rules in our partner VPC allow outbound traffic on ports 443 and 8443, and STUN/TURN server configurations appear correct for the target tenants. The latency between our application server and the Genesys media edge is consistently under 50ms, ruling out network congestion as the primary suspect.
We are observing this behavior primarily in tenants that have strict egress filtering policies enabled. Is there a known limitation or specific header requirement for WebRTC signaling when initiated from a third-party AppFoundry application context? We are particularly interested in whether the multi-tenant OAuth context affects the media relay routing logic or if we need to adjust the ICE candidate gathering timeout values in the SDK configuration to accommodate cross-region handshakes.
Take a look at at the WebSocket connection lifecycle in your JMeter script. When pushing concurrent sessions through AppFoundry, the platform enforces strict limits on open connections per tenant. If the JS SDK isn’t closing the signaling channel properly after a negotiation failure, you hit the 429 rate limit or connection pool exhaustion.
Try adding a teardown step in your load test to explicitly terminate the WebSocket before retrying. Also, check if you are reusing tokens across threads. Each concurrent user needs a unique token to avoid collision.
Be careful with the retry logic. Aggressive retries during negotiation failures can trigger anti-bot mechanisms, locking out the entire test run. Keep the retry interval above 2 seconds and implement exponential backoff.
Here is a quick JMeter BeanShell snippet to force close the connection:
// Force close WebSocket connection
vars.getObject("wsConnection").close();
This usually stabilizes the negotiation phase under load.
Have you tried isolating the issue from the AppFoundry containerization layer? The suggestion above regarding WebSocket teardown is valid for load testing, but in a production multi-tenant deployment, the Genesys Cloud JavaScript SDK often fails to negotiate sessions due to stale ICE candidates cached within the iframe context. The SDK version 5.4.2 has known quirks with media stream cleanup when running inside sandboxed environments.
Consider implementing a forced session reset logic before attempting a new negotiation:
- Call
genesysCloudSDK.sessions.clear() to purge any lingering session objects.
- Revoke the current user access token and request a fresh one via the OAuth 2.0 endpoint.
- Re-initialize the
SessionManager with a new instance ID to ensure clean WebSocket binding.
This approach bypasses the potential connection pool exhaustion by ensuring the signaling channel starts fresh. Also, verify that the ServiceNow Data Action webhook isn’t inadvertently holding up the main thread during the authentication handshake, as this can cause the SDK to timeout before the SDP exchange completes.
Make sure you validate the ICE candidate gathering timeout within the AppFoundry iframe context before attributing the failure solely to network latency or token expiration. The previous suggestions regarding WebSocket teardown and load testing are technically sound for development environments, but they often overlook the specific media stream cleanup issues inherent to sandboxed containers in production.
In our Paris-based operations, we observed that the JavaScript SDK v5.4.2 frequently retains stale ICE candidates when the iframe context persists across multiple session attempts. This results in a negotiation deadlock where the signaling channel remains open, but the media path fails to establish. The dashboard metrics for Active Calls will show a spike, followed immediately by a drop in Answered Calls, indicating a session negotiation failure rather than a routing error.
To mitigate this, implement a forced session reset logic prior to initiating a new getUserMedia request. Specifically, ensure that the RTCPeerConnection object is explicitly closed and garbage collected. A simple configuration adjustment involves setting the iceTransportPolicy to all and ensuring the bundlePolicy is set to max-bundle to reduce the complexity of the SDP exchange.
// Example configuration for Genesys Cloud JS SDK
const options = {
iceTransportPolicy: 'all',
bundlePolicy: 'max-bundle',
// Force cleanup of previous streams
onSessionEnd: () => {
if (peerConnection) {
peerConnection.close();
peerConnection = null;
}
}
};
This approach aligns with the performance views we monitor for agent productivity. By ensuring clean media stream termination, you reduce the overhead on the WebRTC signaling server and prevent the 403 or 429 errors often misattributed to permission issues. Verify the Queue Activity metrics post-implementation to confirm a reduction in abandoned calls due to technical failures.
It depends, but generally… the issue stems from how AppFoundry handles concurrent WebSocket connections during high-volume load tests. When pushing multiple tenants through the integration, the default connection pooling in the JavaScript SDK often exceeds the per-tenant limit. This triggers 429 errors before the ICE negotiation even completes.
A common fix is to adjust the JMeter configuration to simulate realistic connection churn. Instead of keeping all sockets open, force a cleanup cycle. In your test plan, add a tearDown thread group that explicitly closes the signaling channel after each iteration. This prevents connection pool exhaustion.
Also, check the WebSocketMaxRetries parameter in the SDK initialization. If this is set too high, failed negotiations clog the queue. Lowering it to 3 ensures faster failure detection and resource release. This approach stabilizes the throughput during peak concurrent sessions, as seen in my recent capacity planning tests.