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stream: fix deadlock when cloning webstreams #51131

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stream: fix deadlock when cloning webstreams #51131

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tsctx
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@tsctx tsctx commented Dec 12, 2023

Fixes #44985.
Fixed a problem where the process would not terminate if structuredClone was used for webstream and body was not consumed.

@nodejs-github-bot nodejs-github-bot added needs-ci PRs that need a full CI run. web streams labels Dec 12, 2023
@lpinca lpinca added the request-ci Add this label to start a Jenkins CI on a PR. label Dec 13, 2023
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Dec 13, 2023
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CI: https://ci.nodejs.org/job/node-test-pull-request/56283/

aduh95
aduh95 reviewed Dec 17, 2023
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Can you amend the commit message so it matches our guidelines? using is not an imperative verb, I suggest something like stream: fix deadlock when cloning webstreams

node/doc/contributing/pull-requests.md

Lines 170 to 172 in 1149d6b

* be prefixed with the name of the changed [subsystem](#appendix-subsystems)
and start with an imperative verb. Check the output of `git log --oneline
files/you/changed` to find out what subsystems your changes touch.

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@tsctx tsctx changed the title stream: using structuredClone for webstream still terminates process stream: fix deadlock when cloning webstreams Dec 17, 2023
@H4ad H4ad added author ready PRs that have at least one approval, no pending requests for changes, and a CI started. request-ci Add this label to start a Jenkins CI on a PR. labels Dec 19, 2023
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Dec 19, 2023
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CI: https://ci.nodejs.org/job/node-test-pull-request/56394/

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tsctx commented Dec 20, 2023

There seems to be a problem with FinalizationRegistry, so please wait for that to be resolved.

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CI: https://ci.nodejs.org/job/node-test-pull-request/56407/

H4ad
H4ad requested changes Dec 21, 2023
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@tsctx Can you elaborate? (just use request change to block merge)

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tsctx commented Dec 21, 2023

@H4ad
#49344
#47748

jasnell
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Appreciate the work on this but this isn't the correct fix. The issue is the fact that cloned ReadableStream and WritableStream instances use a MessageChannel under the covers to communicate. The MessagePorts for each need to be unref'd in order to allow the process to exit. I'll have an alternative PR opened shortly.

@jasnell jasnell mentioned this pull request Dec 22, 2023
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@tsctx tsctx closed this Dec 22, 2023
@tsctx tsctx deleted the stream/using-structuredClone-for-webstream-still-terminates-process branch December 22, 2023 04:41
@H4ad H4ad mentioned this pull request Jan 16, 2024
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bug: using structuredClone with ReadableStream prevents process from exiting
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