fix rootlessport flake #11269
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fix rootlessport flake #11269
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When the rootlessport process is started the stdout/stderr are attached to the podman process. However once everything is setup podman exits and when the rootlessport process tries to write to stdout it will fail with SIGPIPE. The code handles this signal and puts /dev/null to stdout and stderr but this is not robust. I do not understand the exact cause but sometimes the process is still killed by SIGPIPE. Either go lost the signal or the process got already killed before the goroutine could handle it. Instead of handling SIGPIPE just set /dev/null to stdout and stderr before podman exits. With this there should be no race and no way to run into SIGPIPE errors. [NO TESTS NEEDED] Fixes containers#11248 Signed-off-by: Paul Holzinger <[email protected]>
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openshift-ci
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@edsantiago I have run this patch for over one hour in the test vm without failure so I hope this no longer flakes. |
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Thank you! |
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LGTM |
rhatdan
reviewed
Aug 18, 2021
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| // https://github.com/containers/podman/issues/11248 | ||
| // Copy /dev/null to stdout and stderr to prevent SIGPIPE errors | ||
| if f, err := os.OpenFile("/dev/null", os.O_WRONLY, 0755); err == nil { |
There was a problem hiding this comment.
Nit: Could have used os.DevNull,
LGTM
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LGTM |
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/lgtm |
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locked - please file new issue/PR
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When the rootlessport process is started the stdout/stderr are attached
to the podman process. However once everything is setup podman exits and
when the rootlessport process tries to write to stdout it will fail with
SIGPIPE. The code handles this signal and puts /dev/null to stdout and
stderr but this is not robust. I do not understand the exact cause but
sometimes the process is still killed by SIGPIPE. Either go lost the
signal or the process got already killed before the goroutine could
handle it.
Instead of handling SIGPIPE just set /dev/null to stdout and stderr
before podman exits. With this there should be no race and no way to
run into SIGPIPE errors.
[NO TESTS NEEDED]
Fixes #11248