test: fix flaky test-http-client-timeout-option-with-agent #22083
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Hi, @oyyd! Welcome and thanks for the pull request!
This basically increases the tolerance from 1 second to 2 seconds, right? Before increasing timing tolerance, we should move the test out of the parallel directory and into the sequential directory. That will probably be enough to solve the problem.
EDIT: Hmmm...I'm not sure the parallel->sequential suggestion I make is correct either. I'm having a hard time replicating the failure. It would be very useful to have some idea of how often it fails now and how often it fails with this change.
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Here's a stress test on current master branch to hopefully get an idea of how often this fails: https://ci.nodejs.org/job/node-stress-single-test/1975/nodes=ubuntu1604_sharedlibs_debug_x64/console [EDIT: No failures.] |
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Trying on master again but increasing both the simultaneous number of test processes (from 4 to 8) and the number of times the test is run (from 800 to 3200). https://ci.nodejs.org/job/node-stress-single-test/1976/nodes=ubuntu1604_sharedlibs_debug_x64/console [EDIT: No failures.] |
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On master again, 16 simultaneous test processes running the test 16K times: https://ci.nodejs.org/job/node-stress-single-test/1977/nodes=ubuntu1604_sharedlibs_debug_x64/console [EDIT: No failures.] |
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Oh, I see, this fails in a debug build, which is certainly one way to induce timing issues... Will need to try something else for the stress test.... |
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We'll see if it works, but here is my attempt to persuade the CI server to run the test on a debug build with 96 test processes running the test 192 times: https://ci.nodejs.org/job/node-test-commit-custom-suites/410/default/console [EDIT: Lots of failures. Awesome! We are able to replicate the problem! Now to compare the fix here with moving to |
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@Trott As my increasing tolerance won't fix this fundamentally, moving to |
The timeout event cannot be precisely timed and the actual timeout may be longer in some situations. Here we move this test into the sequential folder to make it happens less likely. Fixes: nodejs#22041
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@Trott does this LGTY with the move to sequential? |
Yes. There may be more to be done to make it reliable, but this is a fine way to go unless and until that can be done, so LGTM. |
Trott
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The CI did not start (infrastructure related) but it does not seem to require one. Moving a test from parallel to sequential should not have impact on the test result. |
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landed in: f8fda89 |
The timeout event cannot be precisely timed and the actual timeout may be longer in some situations. Here we move this test into the sequential folder to make it happens less likely. PR-URL: #22083 Fixes: #22041 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: George Adams <[email protected]>
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(closing this since it's been merged :)) |
The timeout event cannot be precisely timed and the actual timeout may be longer in some situations. Here we move this test into the sequential folder to make it happens less likely. PR-URL: #22083 Fixes: #22041 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: George Adams <[email protected]>
The timeout event cannot be precisely timed and the actual timeout may be longer in some situations. So that we need to loose the asserting.
Fixes: #22041
make -j4 test(UNIX), orvcbuild test(Windows) passes