stream: fix regression on duplex end by mmomtchev · Pull Request #35941 · nodejs/node · GitHub

Decide the return status of writeOrBuffer before
calling stream.write which can reset state.length

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
tests and/or benchmarks are included
documentation is changed or added
commit message follows commit guidelines

Review requested:

@nodejs/streams

Missing test. Also I would like to understand how this can fix that issue. This seems wrong to me.

please remove the console.log and use a common.mustCall() with an assertion instead.

I reshuffled it a little bit, 'data' doesn't get called on correct execution - but must be there in order to trigger the reading

I think this should be a mustCall(), not mustCallAtMost(). The algorithm is deterministic.

CI: https://ci.nodejs.org/job/node-test-pull-request/34034/

Missing test. Also I would like to understand how this can fix that issue. This seems wrong to me.

Obtained by blindly comparing NODE_DEBUG outputs of node 12 vs node-master - they remain remarkably similar despite the fact that the code base has been throughly refactored

Missing test. Also I would like to understand how this can fix that issue. This seems wrong to me.

Obtained by blindly comparing NODE_DEBUG outputs of node 12 vs node-master - they remain remarkably similar despite the fact that the code base has been throughly refactored

Maybe it just reproduces the bug that made it working 😄

I feel there is a more fundamental issue here and suspect that this might just hide it.

I feel there is a more fundamental issue here and suspect that this might just hide it.

I spent two hours yesterday evening and couldn't fully understand it. My theory is that returning false from _write pauses the stream and gives the 'end' chance to get delivered. Otherwise everything remains stuck in an endless loop with the 'end' waiting in a nextTick handler.

I mean part of the problem here is that Readable.push(null) does not Writable.end() the writable side of the Transform.

We could fix that by:

if (this.readableEnded) {
  this.end()
}

inside the transform callback but that would cause a write after end error as I mentioned here.

Just to be clear that I don't mind landing this PR to fix behavior regression (it has some perf regression for sync case) but I don't think it actually solves the fundamental problem here.

lgtm, I think this is fine.

CI: https://ci.nodejs.org/job/node-test-pull-request/34035/

Echoing Robert's "the fundamental issue needs addressing but this can land in the meantime" sentiment.

Sorry if naive question. When this can be released?

This can land in another 40 hours. Then it'll ship in the next v15 in the next week or so. It needs to sit in a current release before being bumped to LTS for 2 weeks. My best guess is at least a month, if not a month and a half.

Given that it seems a pretty urgent regression, we might be ok in short-circuiting this. What do @nodejs/tsc @nodejs/releasers @nodejs/lts think?

@mcollina Do you know when the regression went out in the LTS releases? I'm open to short-circuiting the wait time if it's a recent regression and this PR has sign off from @nodejs/streams.

@richardlau I think this has been there for most of v14 current cycle - not recent at all. It's not in v12.

Just checked. This bug appeared in v14.1.0. Previous versions not affected.

@targos has been preparing a 15.x release for tomorrow, so if this should be urgently fixed perhaps fast tracking into tomorrow's release is an option? We pencilled in a 14.x release for this month but AFAIK haven't settled on an exact date but if this does go out in tomorrow's 15.x release it'll probably make it into the next 14.x release without needing to short circuit LTS wait times.

Then let's fast-track this

cc @nodejs/tsc for awareness

@Trott , @lpinca was this supposed to be included? I am sorry if it was up to me to backport it? What is the usual process when a PR needs backporting?

I think releasers will cherry-pick and leave a note here if it doesn't land cleanly. @nodejs/releasers Should a backport to 14.x be opened at this time? Or hold off?

@mmomtchev If you're confident that this will not be able to be cherry-picked to the v14.x-staging branch and that it should be included, you can get open a backport release by following the instructions at https://github.com/nodejs/node/blob/master/doc/guides/backporting-to-release-lines.md.

May be reopen #35926 until fix in v14 (LTS)? Bug is serious, IMO.

I am confident, the file I modified does not exist on v14.x

Backport Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Refs: nodejs#35941 Fixes: nodejs#35926

@puzrin @Trott I submitted a PR to v14.x-staging with a backport of this change

- Remove unneeded listener for the `'error'` event. - Use `common.mustCall()`. - Verify that the `src` stream gets paused. PR-URL: #36056 Refs: #35941 Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ricky Zhou <0x19951125@gmail.com>

Backport Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Refs: nodejs#35941 Fixes: nodejs#35926

Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Add unit test for #35926 Refs: #35926 Backport-PR-URL: #36375 PR-URL: #35941 Fixes: #35926 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

- Remove unneeded listener for the `'error'` event. - Use `common.mustCall()`. - Verify that the `src` stream gets paused. PR-URL: #36056 Refs: #35941 Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ricky Zhou <0x19951125@gmail.com>

Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Add unit test for #35926 Refs: #35926 Backport-PR-URL: #36375 PR-URL: #35941 Fixes: #35926 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

- Remove unneeded listener for the `'error'` event. - Use `common.mustCall()`. - Verify that the `src` stream gets paused. PR-URL: #36056 Refs: #35941 Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ricky Zhou <0x19951125@gmail.com>

Notable Changes: - **deps**: - upgrade npm to 6.14.9 (Myles Borins) #36450 - update acorn to v8.0.4 (Michaël Zasso) #35791 - **doc**: add release key for Danielle Adams (Danielle Adams) #35545 - **http2**: check write not scheduled in scope destructor (David Halls) #36241 - **stream**: fix regression on duplex end (Momtchil Momtchev) #35941 PR-URL: #36476

Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Add unit test for #35926 Refs: #35926 Backport-PR-URL: #36375 PR-URL: #35941 Fixes: #35926 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

- Remove unneeded listener for the `'error'` event. - Use `common.mustCall()`. - Verify that the `src` stream gets paused. PR-URL: #36056 Refs: #35941 Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ricky Zhou <0x19951125@gmail.com>

Notable Changes: - **deps**: - upgrade npm to 6.14.9 (Myles Borins) #36450 - update acorn to v8.0.4 (Michaël Zasso) #35791 - **doc**: add release key for Danielle Adams (Danielle Adams) #35545 - **http2**: check write not scheduled in scope destructor (David Halls) #36241 - **stream**: fix regression on duplex end (Momtchil Momtchev) #35941 PR-URL: #36476

mcollina added the request-ci Add this label to start a Jenkins CI on a PR. label Nov 3, 2020

mcollina reviewed Nov 3, 2020

View reviewed changes

github-actions Bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Nov 3, 2020

mcollina approved these changes Nov 3, 2020

View reviewed changes

mcollina added the request-ci Add this label to start a Jenkins CI on a PR. label Nov 3, 2020

github-actions Bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Nov 3, 2020

benjamingr approved these changes Nov 3, 2020

View reviewed changes

mcollina added the fast-track PRs that do not need to wait for 48 hours to land. label Nov 3, 2020

mcollina mentioned this pull request Nov 3, 2020

v15.1.0 release proposal #35948

Merged

mmomtchev added a commit to mmomtchev/node that referenced this pull request Nov 22, 2020

stream: fix regression on duplex end

c6fa9a6

Backport Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Refs: nodejs#35941 Fixes: nodejs#35926

mmomtchev mentioned this pull request Nov 22, 2020

[14.x] stream: fix regression on duplex end #36229

Closed

3 tasks

wa-Nadoo mentioned this pull request Nov 22, 2020

stream: avoid drain for sync streams #32887

Closed

4 tasks

enov pushed a commit to enov/node that referenced this pull request Dec 4, 2020

stream: fix regression on duplex end

b0a1830

Backport Decide the return status of writeOrBuffer before calling stream.write which can reset state.length Refs: nodejs#35941 Fixes: nodejs#35926

enov mentioned this pull request Dec 4, 2020

[14.x] stream: fix regression on duplex end #36375

Closed

3 tasks

BethGriggs mentioned this pull request Dec 10, 2020

v14.15.2 proposal #36476

Merged

This was referenced Dec 18, 2020

[bug] POST -> Premature close stream fastify/fastify#2739

Closed

POST -> Premature close? sindresorhus/got#1556

Closed

amotzte mentioned this pull request Jan 5, 2021

Can you upgrade chrome docker to latest LTS node.js? browserless/browserless#1200

Closed

Heerschop mentioned this pull request Jan 19, 2021

Script execution can freeze chanzo/script-launcher#128

Closed

clshortfuse mentioned this pull request Feb 3, 2021

HTTP responses on Node v14.15.2+ hang #37210

Closed

targos added backported-to-v14.x stream Issues and PRs related to the stream subsystem. and removed fast-track PRs that do not need to wait for 48 hours to land. labels Apr 25, 2021

stream: fix regression on duplex end by mmomtchev · Pull Request #35941 · nodejs/node · GitHub

Uh oh!

Uh oh!

stream: fix regression on duplex end - #35941

stream: fix regression on duplex end#35941Trott merged 1 commit intonodejs:masternodejs/node:masterfrom mmomtchev:duplex-endmmomtchev/node:duplex-endCopy head branch name to clipboard

Conversation

mmomtchev commented Nov 3, 2020 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Checklist

Uh oh!

nodejs-github-bot commented Nov 3, 2020

Uh oh!

ronag commented Nov 3, 2020 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

mcollina Nov 3, 2020

Choose a reason for hiding this comment

Uh oh!

mmomtchev Nov 3, 2020

Choose a reason for hiding this comment

Uh oh!

mcollina Nov 3, 2020

Choose a reason for hiding this comment

Uh oh!

nodejs-github-bot commented Nov 3, 2020

Uh oh!

mmomtchev commented Nov 3, 2020

Uh oh!

mmomtchev commented Nov 3, 2020

Uh oh!

ronag commented Nov 3, 2020

Uh oh!

mmomtchev commented Nov 3, 2020

Uh oh!

ronag commented Nov 3, 2020 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

ronag commented Nov 3, 2020 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

mcollina left a comment

Choose a reason for hiding this comment

Uh oh!

nodejs-github-bot commented Nov 3, 2020

Uh oh!

benjamingr left a comment

Choose a reason for hiding this comment

Uh oh!

puzrin commented Nov 3, 2020

Uh oh!

mcollina commented Nov 3, 2020

Uh oh!

richardlau commented Nov 3, 2020

Uh oh!

mcollina commented Nov 3, 2020

Uh oh!

puzrin commented Nov 3, 2020

Uh oh!

richardlau commented Nov 3, 2020

Uh oh!

mcollina commented Nov 3, 2020

Uh oh!

mcollina commented Nov 3, 2020

Uh oh!

Trott commented Nov 20, 2020

Uh oh!

puzrin commented Nov 20, 2020

Uh oh!

mmomtchev commented Nov 20, 2020

Uh oh!

mmomtchev commented Nov 22, 2020

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

10 participants

stream: fix regression on duplex end#35941
Trott merged 1 commit into
nodejs:masterfrom
mmomtchev:duplex-end

mmomtchev commented Nov 3, 2020 •
edited
Loading

ronag commented Nov 3, 2020 •
edited
Loading

ronag commented Nov 3, 2020 •
edited
Loading

ronag commented Nov 3, 2020 •
edited
Loading