René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Aborting a fetch response stream throws uncatchable exception","articleBody":"### Version\n\n22.12.0\n\n### Platform\n\n```text\nMicrosoft Windows NT 10.0.26100.0\nx64\n```\n\n### Subsystem\n\n_No response_\n\n### What steps will reproduce the bug?\n\nSuppose downloading a large file using fetch API.\nWhen the response stream is being read and abort the fetch request afterwards, it will throw a uncatchable exception and crash the process.\n\n```js\nimport { Readable } from \"stream\";\nimport { finished } from \"stream/promises\";\nimport fs from \"fs\";\n\ntry {\n  const res = await fetch(\"https://testfile.org/1.3GBiconpng\", {\n    signal: AbortSignal.timeout(5000),\n  });\n  const fileStream = fs.createWriteStream(\"./test\");\n  await finished(Readable.fromWeb(res.body).pipe(fileStream));\n} catch (err) {\n  // Cannot catch the abort error\n  console.error(\"Error occurred!\", err);\n}\n```\n\n### How often does it reproduce? Is there a required condition?\n\nAlways.\n\n### What is the expected behavior? Why is that the expected behavior?\n\nError should be caught.\n\n### What do you see instead?\n\nUncaught exception is thrown. Process crashes.\n\n```\nnode:events:502\n      throw er; // Unhandled 'error' event\n      ^\nDOMException [TimeoutError]: The operation was aborted due to timeout\n    at new DOMException (node:internal/per_context/domexception:53:5)\n    at Timeout._onTimeout (node:internal/abort_controller:141:9)\n    at listOnTimeout (node:internal/timers:594:17)\n    at process.processTimers (node:internal/timers:529:7)\nEmitted 'error' event on Readable instance at:\n    at emitErrorNT (node:internal/streams/destroy:170:8)\n    at emitErrorCloseNT (node:internal/streams/destroy:129:3)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n```\n\n### Additional information\n\nIf you want to set a timeout for the fetch request in this case, you should use setTimeout and AbortController manually.\n\n```js\nimport { Readable } from \"stream\";\nimport { finished } from \"stream/promises\";\nimport fs from \"fs\";\n\nconst controller = new AbortController();\nconst id = setTimeout(() => {\n  controller.abort();\n}, 5000);\ntry {\n  const res = await fetch(\"https://testfile.org/1.3GBiconpng\", {\n    signal: controller.signal,\n  });\n  clearTimeout(id);\n  const fileStream = fs.createWriteStream(\"./test\");\n  await finished(Readable.fromWeb(res.body).pipe(fileStream));\n} catch (err) {\n  console.error(\"Error occurred!\", err);\n}\n```","author":{"url":"https://github.com/hioman01","@type":"Person","name":"hioman01"},"datePublished":"2025-03-07T14:31:26Z","url":"https://github.com/nodejs/node/issues/57360"}