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test: fix flaky test-child-process-pass-fd on Fedora 24 #17598

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@Trott Trott commented Dec 11, 2017 •
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test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

Fixes: #17589

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

test child_process

@Trott Trott added the wip Issues and PRs that are still a work in progress. label Dec 11, 2017
@nodejs-github-bot nodejs-github-bot added the test Issues and PRs related to the tests. label Dec 11, 2017
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Trott commented Dec 11, 2017

Stress test against master (hopefully shows test failing): https://ci.nodejs.org/job/node-stress-single-test/1563/nodes=fedora24/console

Stress test against this pull request: https://ci.nodejs.org/job/node-stress-single-test/1564/nodes=fedora24/console

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Trott commented Dec 11, 2017 •
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Argh, just noticed something I should have looked at before: This problem does not happen on the Digital Ocean host, just the Rackspace host (which is probably provisioned with fewer resources). I will have to re-run the one of the stress tests.

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Trott commented Dec 11, 2017

Oh, neat-o, I guess...once the stress test fails, it then fails again and again and again. Stress test for master is red, so that at least confirms the problem.

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Trott commented Dec 11, 2017

Re-running stress test against this PR using Rackspace:

https://ci.nodejs.org/job/node-stress-single-test/1565/nodes=fedora24/

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Trott commented Dec 11, 2017 •
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Stress test for this PR still failed with "Resource temporarily unavailable". More work to be done...

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Trott commented Dec 11, 2017

OK, more changes, trying again....

CI stress test: https://ci.nodejs.org/job/node-stress-single-test/1566/nodes=fedora24/console

@Trott
test: fix flaky test-child-process-pass-fd
529f000 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

Fixes: nodejs#17589
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Trott commented Dec 11, 2017

Stress test against this PR is looking very good: 9392 successes so far without a failure. I've rebased against master, squashed, written a better commit message and force pushed. Will wait for stress test to finish before running a full CI...removing in progress label.

@Trott Trott removed the wip Issues and PRs that are still a work in progress. label Dec 11, 2017
@Trott Trott changed the title wip fix flaky test-child-process-pass-fd test: fix flaky test-child-process-pass-fd on Fedora 24 Dec 11, 2017
@Trott Trott added the child_process Issues and PRs related to the child_process subsystem. label Dec 11, 2017
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Trott commented Dec 12, 2017

CI: https://ci.nodejs.org/job/node-test-pull-request/12052/

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Trott commented Dec 12, 2017

@nodejs/testing

This was referenced Dec 12, 2017
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gibfahn commented Dec 12, 2017

LGTM as is, but might it be it worth adding a delay before trying to fork again?

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LGTM but I agree with @gibfahn that a delay would be good.

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Trott commented Dec 13, 2017

Landed in d64b0a8

@Trott Trott closed this Dec 13, 2017
Trott added a commit to Trott/io.js that referenced this pull request Dec 13, 2017
@Trott
test: fix flaky test-child-process-pass-fd
d64b0a8 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: nodejs#17598
Fixes: nodejs#17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
MylesBorins pushed a commit that referenced this pull request Jan 8, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
6cb4cc2 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Jan 10, 2018
Merged
MylesBorins pushed a commit that referenced this pull request Jan 22, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
a304206 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
MylesBorins pushed a commit that referenced this pull request Jan 22, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
fcc5b99 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Jan 24, 2018
Merged
MylesBorins pushed a commit that referenced this pull request Feb 11, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
be8c371 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
MylesBorins pushed a commit that referenced this pull request Feb 12, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
22bc6a1 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
MylesBorins pushed a commit that referenced this pull request Feb 13, 2018
@Trott @MylesBorins
test: fix flaky test-child-process-pass-fd
fb0bd8a 
test-child-process-pass-fd needs to launch many processes
simultaneously. On Fedora 24, this can result in EAGAIN "Resource
temporarily unavailable" errors. When this occurs, simply try to launch
a worker again.

PR-URL: #17598
Fixes: #17589
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
@Trott Trott deleted the fixit-maybe branch January 13, 2022 22:48
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@jasnell jasnell jasnell approved these changes

@santigimeno santigimeno santigimeno approved these changes

@gireeshpunathil gireeshpunathil gireeshpunathil approved these changes

@BridgeAR BridgeAR BridgeAR approved these changes

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@gibfahn gibfahn gibfahn approved these changes

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investigate flaky tests on fedora 24
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