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fix: prevent stack overflow in transport close with re-entrancy guard (#1788)

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Co-authored-by: Felix Weinberger <fweinberger@anthropic.com>
Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>
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Clay 2026-04-02 08:59:31 -04:00 • committed by GitHub
commit df4b6cc88d
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6
packages/server/src/server/streamableHttp.ts
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@ -225,6 +225,7 @@ export class WebStandardStreamableHTTPServerTransport implements Transport {
// when sessionId is not set (undefined), it means the transport is in stateless mode
private sessionIdGenerator: (() => string) | undefined;
private _started: boolean = false;
private _closed: boolean = false;
private _streamMapping: Map<string, StreamMapping> = new Map();
private _requestToStreamMapping: Map<RequestId, string> = new Map();
private _requestResponseMap: Map<RequestId, JSONRPCMessage> = new Map();
@ -897,6 +898,11 @@ export class WebStandardStreamableHTTPServerTransport implements Transport {
}
async close(): Promise<void> {
if (this._closed) {
return;
}
this._closed = true;
// Close all SSE connections
for (const { cleanup } of this._streamMapping.values()) {
cleanup();