workers: fix invalid exit code in parent upon uncaught exception #21713
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Now worker.on('exit') reports correct exit code (1) if worker has exited
with uncaught exception.
Fixes: nodejs#21707
lib/internal/worker.js
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| @@ -445,6 +445,9 @@ function setupChild(evalScript) { | |||
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| function fatalException(error) { | |||
| debug(`[${threadId}] gets fatal exception`); | |||
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| process.exitCode = 1; | |||
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I'm afraid process.exitCode may be 1 even if the exception is caught.
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I agree – I think you want to move this into the if (!caught) block below?
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My bad, I assumed that this was unrecoverable (I thought 'uncaughtException' didn't count as recovery). Will push soon. I also added test similar to test-process-exit-code for workers.
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I think behaviour should match the main thread’s behaviour as closely as possible – in there, we have that process.exitCode is not set, as far as I can tell:
process.on("uncaughtException", () => console.log(process.exitCode));
throw new Error();prints undefined.
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If I understand correctly windows CI failure seems unrelated: |
lib/internal/worker.js
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| @@ -445,6 +445,10 @@ function setupChild(evalScript) { | |||
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| function fatalException(error) { | |||
| debug(`[${threadId}] gets fatal exception`); | |||
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| // set exit code for local worker's 'exit' listeners | |||
| process.exitCode = 1; | |||
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Copying the comment because Github currently hides it:
I think behaviour should match the main thread’s behaviour as closely as possible – in there, we have that process.exitCode is not set, as far as I can tell:
process.on("uncaughtException", () => console.log(process.exitCode));
throw new Error();prints undefined.
I really think we just need to set process.exitCode in the if (!caught) block once.
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That makes sense, but we should probably consider setting the code before calling handler (in both here and for process), to avoid current situation where it emits code 1 but process.exitCode has older value or undefined?
Edit: I mean in 'exit' event.
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@lundibundi I think that makes sense, yes. But since it affects all Node.js code, not just Workers, we probably should do it in a separate (and maybe even semver-major) PR.
The code you’d probably want to look at – if you want to tackle it yourself – is in process._fatalException in lib/internal/bootstrap/node.js and FatalException() in src/node.cc. We currently have hardcoded values for exiting in the latter function, so I think setting process.exitCode from exit handlers doesn’t have any effect at the moment?
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@addaleax Yeah, while looking into this one I looked though those functions (I actually first thought that exit code should be set on c++ side because we are listening on an exit callback from it).
From what I've seen both workers and process use node.cc/EmitExit which actually reevaluates exitCode after the event, so I think it will change the code. But indeed for the uncaught exception this is not the case, as it will always exit with 1 from FatalException() if it wasn't handled (or other hardcoded codes).
Should I open an issue first to track it or it should be okay to just submit PR?
addaleax
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CI: https://ci.nodejs.org/job/node-test-pull-request/15768/ (edit: ✔️) |
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Landed in 1e9c3f8, thanks a lot for the PR! 🎉 |
Now worker.on('exit') reports correct exit code (1) if worker has exited
with uncaught exception.
Fixes: #21707
PR-URL: #21713
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
Reviewed-By: Weijia Wang <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Now worker.on('exit') reports correct exit code (1) if worker has exited
with uncaught exception.
Fixes: #21707
PR-URL: #21713
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
Reviewed-By: Weijia Wang <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Now worker.on('exit') reports correct exit code (1) if worker has exited
with uncaught exception.
Fixes: #21707
Checklist
make -j4 test(UNIX) passesAlso, if there is any standard shorthand for uncaughtException then please tell me. I'd like to get the message down to 50 columns =).