stream: allow readable to end early without error #40881

ronag · 2021-11-19T13:03:25Z

No description provided.

ronag · 2021-11-19T13:03:35Z

@nodejs/streams

ronag · 2021-11-19T13:16:19Z

@benjamingr I think this PR will be necessary for e.g. take(n).

nodejs-github-bot · 2021-11-19T13:19:15Z

CI: https://ci.nodejs.org/job/node-test-pull-request/40995/

nodejs-github-bot · 2021-11-19T17:47:46Z

CI: https://ci.nodejs.org/job/node-test-pull-request/41001/

ronag · 2021-11-22T08:32:04Z

lib/internal/streams/pipeline.js

-      } else {
-        ret = makeAsyncIterable(ret);
-
+      } else if (isIterable(ret)) {
        finishCount++;
        pump(ret, stream, finish);


pump has its own cleanup logic through async iterator.

ronag · 2021-11-25T20:03:25Z

@nodejs/streams I noticed some other issues while working on this. Please see updated tests.

lib/internal/streams/pipeline.js

nodejs-github-bot · 2021-12-04T20:39:37Z

CI: https://ci.nodejs.org/job/node-test-pull-request/41342/

lpinca · 2021-12-04T21:44:54Z

test/parallel/test-stream-pipeline.js

+    return ret;
+  }, common.mustCall((err, val) => {
+    assert.strictEqual(err, undefined);
+    assert.strictEqual(val, 'helloworld');


This test seems to be broken. val is undefined, I'm not sure why the thrown exception does not make the process exit. I did not investigate.

Yea.. that's weird. Fixed the test.

Updated test looks good, but why the process did not exit?

I can reproduce the same issue with current Node.js version (v17.2.0) so it is not related to this PR but it is something to investigate and fix.

It seems that the error thrown in the callback is caught and swallowed here

node/lib/internal/streams/pipeline.js

Lines 163 to 164 in 147d23b

} catch (err) {

finish(error !== err ? aggregateTwoErrors(error, err) : err);

.

Fixed, PTAL, f0ec29b

nodejs-github-bot · 2021-12-05T11:36:09Z

CI: https://ci.nodejs.org/job/node-test-pull-request/41355/

nodejs-github-bot · 2021-12-05T16:22:48Z

CI: https://ci.nodejs.org/job/node-test-pull-request/41361/

lpinca

Can you please add a test for cf85105?

nodejs-github-bot · 2021-12-06T15:57:11Z

CI: https://ci.nodejs.org/job/node-test-pull-request/41367/ ✅

ronag · 2021-12-06T19:42:29Z

Landed in 1fa507f

PR-URL: #40881 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

danielleadams · 2022-01-31T01:49:44Z

@ronag do you mind making a backport PR for this for v16.x-staging? It did not land cleanly when pulling into the 16.x release.

PR-URL: nodejs#40881 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

ronag requested a review from mcollina November 19, 2021 13:03

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ronag added request-ci Add this label to start a Jenkins CI on a PR. stream Issues and PRs related to the stream subsystem. and removed needs-ci PRs that need a full CI run. labels Nov 19, 2021

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CI Reliability 2021-11-20 nodejs/reliability#123

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CI Reliability 2021-11-21 nodejs/reliability#124

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ronag requested a review from jasnell November 21, 2021 17:21

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CI Reliability 2021-11-22 nodejs/reliability#125

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ronag requested a review from lpinca November 22, 2021 07:57

ronag mentioned this pull request Nov 22, 2021

stream: don't emit finish after destroy #40852

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ronag commented Nov 22, 2021

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ronag force-pushed the readable-take branch from 6288e57 to 308e4a2 Compare November 22, 2021 15:10

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CI Reliability 2021-11-23 nodejs/reliability#126

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ronag marked this pull request as draft November 23, 2021 11:37

This was referenced Nov 24, 2021

CI Reliability 2021-11-24 nodejs/reliability#127

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CI Reliability 2021-11-25 nodejs/reliability#128

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ronag force-pushed the readable-take branch from 917fb2a to 59e377c Compare November 25, 2021 20:00

ronag marked this pull request as ready for review November 25, 2021 20:02

wa-Nadoo reviewed Nov 25, 2021

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ronag commented Nov 26, 2021

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lpinca requested changes Dec 4, 2021

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fixup

f0ec29b

ronag requested a review from lpinca December 4, 2021 22:13

github-actions bot mentioned this pull request Dec 5, 2021

CI Reliability 2021-12-05 nodejs/reliability#135

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fixup: nextTick callback

cf85105

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CI Reliability 2021-12-06 nodejs/reliability#136

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ronag added a commit that referenced this pull request Dec 6, 2021

stream: allow readable to end early without error

1fa507f

PR-URL: #40881 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

ronag closed this Dec 6, 2021

danielleadams mentioned this pull request Dec 14, 2021

v17.3.0 release proposal #41167

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danielleadams added the backport-requested-v16.x label Jan 31, 2022

juanarbol mentioned this pull request May 29, 2022

stream: allow returning null from pipeline tail #42078

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targos added dont-land-on-v16.x and removed backport-requested-v16.x labels Jul 31, 2022

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stream: allow readable to end early without error #40881

stream: allow readable to end early without error #40881

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danielleadams commented Jan 31, 2022

	} catch (err) {
	finish(error !== err ? aggregateTwoErrors(error, err) : err);

stream: allow readable to end early without error #40881

stream: allow readable to end early without error #40881

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