Restart FPM completely in case of timeouts #1144
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Follow-up of #1133 This is because sending SIGUSR2 to FPM (the previously implemented solution) did not really stop with 100% certainty the PHP script that timed out. Indeed, it merely interrupted the currently blocked call (e.g. a sleep, a DB call, etc.), flushed the logs and carried on. My guess is that this could have caused the PHP script to continue to run in some cases, possibly running into yet another timeout on a next line (e.g. another DB call). This PR fixes the timeout test that wasn't really working (🤦) and restarts FPM completely in case of timeout. That is confirmed to completely stop the execution of the timed out script + flush the logs to stderr.
mnapoli
commented
Jan 27, 2022
| rlimit_core = 1 | ||
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| ; Very short timeout to be able to test timeouts without having a very long test suite | ||
| request_terminate_timeout = 1 |
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This was a leftover from 2019 that "faked" the results of the timeout test 🤦
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This is what CloudWatch logs look like now when you have 1 good request followed by 1 timed-out request:
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shadowhand
approved these changes
Jan 27, 2022
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t-richard
approved these changes
Jan 27, 2022
Contributor
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@mnapoli can we get a release with this? We're currently trying to upgrade to serverless v3 but stuck because this hasn't been released. |
Member
Author
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@shadowhand you will have to wait until I do, maybe today. |
Contributor
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@mnapoli thank you! 💛 |
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Follow-up of #1133
This is because sending SIGUSR2 to FPM (the previously implemented solution) did not really stop with 100% certainty the PHP script that timed out.
Indeed, it merely interrupted the currently blocked call (e.g. a sleep, a DB call, etc.), flushed the logs and carried on. My guess is that this could have caused the PHP script to continue to run in some cases, possibly running into yet another timeout on a next line (e.g. another DB call).
This PR fixes the timeout test that wasn't really working (🤦) and restarts FPM completely in case of timeout. That is confirmed to completely stop the execution of the timed out script + flush the logs to stderr.