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test: fix unreliable test-gc-http-client #23145

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test: fix unreliable test-gc-http-client #23145

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@Trott Trott commented Sep 28, 2018 •
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Calling global.gc() in multiple places leads to unreliability. Call it
in the interval only.

Fixes: #22336

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

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@Trott build started: https://ci.nodejs.org/blue/organizations/jenkins/node-test-pull-request-lite-pipeline/detail/node-test-pull-request-lite-pipeline/1049/pipeline

@nodejs-github-bot nodejs-github-bot added the test Issues and PRs related to the tests. label Sep 28, 2018
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Trott commented Sep 28, 2018

Would like to fast-track this. 👍 if you approve.

@Trott Trott added the fast-track PRs that do not need to wait for 48 hours to land. label Sep 28, 2018
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Trott commented Sep 28, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/17497/

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targos commented Sep 28, 2018

Does it really fix #23066? It's not modifying the test in question.

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targos commented Sep 28, 2018

Please remove the "Fixes:" link from the commit message.

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Sorry, this test is not fixed for me

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@targos Just to be clear, your red X is about the Fixes: tag, not the diff itself, right? Because I think this is definitely an improvement.

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targos commented Sep 28, 2018

After applying this change, I ran: ./tools/test.py --repeat 100 test/sequential/test-gc-http-client.js

The test always fails before the 30th execution.

@targos targos dismissed their stale review September 28, 2018 14:28

might be an improvement, but doesn't fix flakyness

@Trott Trott mentioned this pull request Sep 28, 2018
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test: fix unreliable test-gc-http-client
8741af6 
Calling `global.gc()` in multiple places leads to unreliability. Call it
in the interval only.

Fixes: nodejs#22336
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Trott commented Sep 28, 2018

Stress test this PR: https://ci.nodejs.org/job/node-stress-single-test/2031/

Stress test master: https://ci.nodejs.org/job/node-stress-single-test/2032/

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Trott commented Sep 28, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/17498/

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Trott commented Sep 28, 2018

Given CI stress test results (8 failures in 1000 runs on master vs. 0 failures in 1000 runs with this PR), I'm inclined to believe that "Fixes:" is correct here, except for @targos reporting that it is still happening locally...

@targos Is there any chance at all that you were testing against master and not this PR or something like that? Can you share a gist of you at least some of your output and also what platform/OS you're on?

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Trott commented Sep 28, 2018 •
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ARM rebuild: https://ci.nodejs.org/job/node-test-commit-arm/18818/ ✔️

Windows rebuild: https://ci.nodejs.org/job/node-test-commit-windows-fanned/21109/ ✔️

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targos commented Sep 29, 2018

@Trott

@targos Is there any chance at all that you were testing against master and not this PR or something like that? Can you share a gist of you at least some of your output and also what platform/OS you're on?

I'm certain that I am testing against this PR applied on top of master.
Gist (truncated after 10 runs): https://gist.github.com/targos/2b9fd900456e64a6fd2f7245d9e18125

My platform is Linux (Fedora 28)

If this fixes the issue on CI, I'm not blocking it.

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Trott commented Sep 29, 2018

@targos Thanks! Interesting! I think your gist is different than what we're seeing in CI, I think, because Done: always gets up to 300/300 and it's Collected: that stalls. But for you, it looks like Done: stalled... Any chance there's some firewall throttling going on or something like that?

@Trott Trott added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Sep 30, 2018
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refack commented Oct 1, 2018

Resume CI (just for good measure): https://ci.nodejs.org/job/node-test-commit/21949/

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Trott commented Oct 2, 2018

Windows timed out so will definitely remove the Fixes, just like @targos suggested. (Stress tests showing failures on master and clean runs with this PR were run on AIX.)

ARM rebuild: https://ci.nodejs.org/job/node-test-commit-arm/18888/

Windows rebuild: https://ci.nodejs.org/job/node-test-commit-windows-fanned/21186/

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Trott commented Oct 2, 2018

Windows rebuild: https://ci.nodejs.org/job/node-test-commit-windows-fanned/21188/

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Trott commented Oct 2, 2018

Landed in 87ea0ca

@Trott Trott closed this Oct 2, 2018
Trott added a commit to Trott/io.js that referenced this pull request Oct 2, 2018
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test: improve test-gc-http-client
87ea0ca 
Calling `global.gc()` in multiple places leads to unreliability. Call it
in the interval only.

PR-URL: nodejs#23145
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: James M Snell <[email protected]>
@joyeecheung joyeecheung mentioned this pull request Oct 2, 2018
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targos pushed a commit that referenced this pull request Oct 3, 2018
@Trott @targos
test: improve test-gc-http-client
9b30a63 
Calling `global.gc()` in multiple places leads to unreliability. Call it
in the interval only.

PR-URL: #23145
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: James M Snell <[email protected]>
@targos targos mentioned this pull request Oct 7, 2018
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@Trott Trott deleted the fix-23066 branch January 13, 2022 22:50
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@trivikr trivikr trivikr approved these changes

@lpinca lpinca lpinca approved these changes

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@thefourtheye thefourtheye thefourtheye approved these changes

@jasnell jasnell jasnell approved these changes

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Investigate flaky parallel/test-gc-http-client
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@Trott @nodejs-github-bot @targos @addaleax @refack @jasnell @thefourtheye @lpinca @trivikr