NodeHttpServer disposal hangs after client aborts handler awaiting upstream fetch

[schickling-assistant]

NodeHttpServer disposal can remain pending indefinitely when a client aborts a request whose handler is waiting on an upstream FetchHttpClient request. The configured gracefulShutdownTimeout does not bound disposal in this case.

Reproduction

https://github.com/schickling-repros/2026-07-effect-node-http-aborted-request-dispose

npm install
node repro.mjs

The reproduction starts:

1. An upstream Node server that accepts a HEAD request but intentionally leaves its response pending.
2. An Effect NodeHttpServer whose HEAD / handler awaits HttpClient.head to that upstream.
3. A downstream Node client that aborts after the upstream request starts.
4. runtime.dispose() with gracefulShutdownTimeout: "100 millis".

Expected

The aborted request handler is interrupted and runtime.dispose() completes, bounded by the configured graceful shutdown timeout.

Actual

The request handler fiber remains in the server's handler scope and runtime.dispose() does not complete. The reproduction fails after two seconds:

Error: FAIL: runtime.dispose exceeded 2 seconds

Temporary instrumentation showed that the server's preemptive shutdown finalizer completes, but the handler child scope retains the aborted HEAD / fiber, preventing the outer server scope finalizer from running. The current response-close guard only interrupts when nodeResponse.writableEnded is false; in this case the close observed during disposal has writableEnded === true while the handler fiber is still pending.

Versions

• effect: 4.0.0-beta.99
• @effect/platform-node: 4.0.0-beta.99
• Node.js: 24.15.0
• Linux x86_64

The same standalone reproduction fails against current Effect main at ce95d88603e9facbcd6c462c5444e391792dde6b.

Posted on behalf of @schickling

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