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fix(channels): exponential backoff for gateway listener restarts

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Without this, an unrecoverable failure such as TokenInvalid causes the
gateway listener to restart ~10x/sec, which Discord's Cloudflare layer
treats as abuse and answers with a multi-hour IP block. Both the clean-
expiry path and the error path now share a backoff that doubles up to
1h, with a >5min healthy run resetting the counter.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
krejov100
2026-05-07 17:56:33 +00:00
parent 953264e0d3
commit 42e8ae004e
1 changed files with 29 additions and 14 deletions
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src/channels/chat-sdk-bridge.ts
+29 -14
View File
@@ -305,8 +305,14 @@ export function createChatSdkBridge(config: ChatSdkBridgeConfig): ChannelAdapter
// Start local HTTP server to receive forwarded Gateway events (including interactions)
const webhookUrl = await startLocalWebhookServer(gatewayAdapter, setupConfig, config.botToken);
// Exponential backoff capped at 1h. Without this, an unrecoverable
// failure (e.g., TokenInvalid) restarts ~10×/sec and Discord's
// Cloudflare layer issues a multi-hour IP block. A run that lasts
// longer than 5 minutes counts as healthy and resets the counter.
let consecutiveFailures = 0;
const startGateway = () => {
if (gatewayAbort?.signal.aborted) return;
const startedAt = Date.now();
// Capture the long-running listener promise via waitUntil
let listenerPromise: Promise<unknown> | undefined;
gatewayAdapter.startGatewayListener!(
@@ -321,21 +327,30 @@ export function createChatSdkBridge(config: ChatSdkBridgeConfig): ChannelAdapter
).then(() => {
// startGatewayListener resolves immediately with a Response;
// the actual work is in the listenerPromise passed to waitUntil
if (listenerPromise) {
listenerPromise
.then(() => {
if (!gatewayAbort?.signal.aborted) {
log.info('Gateway listener expired, restarting', { adapter: adapter.name });
startGateway();
}
})
.catch((err) => {
if (!gatewayAbort?.signal.aborted) {
log.error('Gateway listener error, restarting in 5s', { adapter: adapter.name, err });
setTimeout(startGateway, 5000);
}
if (!listenerPromise) return;
const reschedule = (err?: unknown) => {
if (gatewayAbort?.signal.aborted) return;
const ranForMs = Date.now() - startedAt;
if (ranForMs > 5 * 60 * 1000) consecutiveFailures = 0;
else consecutiveFailures++;
const delayMs = Math.min(60 * 60 * 1000, 2 ** consecutiveFailures * 1000);
if (err) {
log.error('Gateway listener error, retrying', {
adapter: adapter.name,
err,
consecutiveFailures,
delayMs,
});
}
} else {
log.info('Gateway listener expired, restarting', {
adapter: adapter.name,
consecutiveFailures,
delayMs,
});
}
setTimeout(startGateway, delayMs);
};
listenerPromise.then(() => reschedule()).catch(reschedule);
});
};
startGateway();