Handling WebSocket reconnection logic for Genesys Cloud Notification API in Node.js

• Node.js v18 LTS
• @genesyscloud/purecloud-platform-client-v2 SDK
• HashiCorp Vault for secret storage
• AWS Lambda runtime

Is it possible to implement a robust reconnection strategy for the Genesys Cloud Notification API WebSocket client that respects both the platform’s backoff policies and our internal secret rotation schedules?

I am building a service that listens to /api/v2/analytics/events for real-time queue updates. The current implementation uses the official SDK to establish the connection. However, when the underlying WebSocket drops due to network instability or a forced client secret rotation in Vault, the default SDK reconnection behavior seems to fail silently or exhaust retries too quickly.

Here is the core connection setup:

const PureCloudPlatformClientV2 = require('@genesyscloud/purecloud-platform-client-v2');

const setup = new PureCloudPlatformClientV2.Setup();
setup.init(
 process.env.CLIENT_ID,
 process.env.CLIENT_SECRET, // Rotated via Vault
 process.env.API_ENVIRONMENT,
 process.env.ORGANIZATION_ID
);

const notificationClient = new PureCloudPlatformClientV2.NotificationClient();

notificationClient.connect({
 subscriptions: [
 {
 topic: '/api/v2/analytics/events',
 filter: { query: 'event.type=="queueEvent"' }
 }
 ]
}).then(() => {
 console.log('WebSocket connected');
}).catch((err) => {
 console.error('Connection failed:', err);
});

The issue arises when CLIENT_SECRET is rotated in Vault. The active WebSocket connection remains open until a keep-alive failure, resulting in a 401 Unauthorized on the next message or a generic disconnect. I need to handle the re-authentication gracefully without dropping the subscription state.

I have tried:

1. Catching the error event on the WebSocket and manually calling notificationClient.connect() with refreshed credentials. This results in duplicate subscriptions or errors.
2. Using the reconnect option in the SDK, but it does not seem to support injecting a new token before the reconnect attempt.

How should I structure the reconnection logic to ensure that after a secret rotation, the client fetches a new OAuth token and re-subscribes cleanly without losing the event stream? I am looking for a pattern that integrates well with an async secret retrieval function.

You need to implement an exponential backoff with jitter in your WebSocket reconnect handler. The GC Notification API rejects rapid reconnections. Here is a minimal Node.js snippet handling the close event:

ws.on('close', (code, reason) => {
 const delay = Math.min(1000 * Math.pow(2, retries), 30000) + Math.random() * 1000;
 setTimeout(() => connectWebSocket(), delay);
 retries++;
});

Genesys Cloud enforces strict rate limits on WebSocket handshakes. If you reconnect too aggressively, the platform returns 429 Too Many Requests. Also, ensure your OAuth token refreshes before expiration to avoid auth drops during reconnection.

I typically get around this by adding token rotation checks before reconnect.

1. Verify Vault secret freshness.
2. Apply exponential backoff with jitter.
3. Re-initiate WebSocket with valid token.

This prevents 401s during rotation. The event stream stays healthy.

Have you tried checking the Retry-After header before reconnecting? The platform enforces strict backoff on 429s, so ignoring it just burns your rate limit.

Here is the logic I use in Node.js to parse that header and apply jitter. It stops the thundering herd problem during secret rotation.

ws.on('close', (code, reason) => {
 const retryAfter = ws.headers?.['retry-after'] || Math.min(Math.pow(2, retries), 30);
 const jitter = Math.random() * 1000;
 setTimeout(() => connectWebSocket(), (retryAfter * 1000) + jitter);
 retries++;
});

I am in Sydney, so I see these spikes during US off-hours when batch jobs restart.