Container Linux versions based on kernel 4.14.96 have broken POSIX timers #2549
Container Linux Version
Unknown (issue happens at my SaaS CI infrastructure), but the kernel is:
Posix timers generate periodic signals if configured to do so
Posix timers generate a signal just once
I'm skipping this because the problem is well understood and has an upstream fix - see below.
Kernel 4.14.96, used by Container Linux 1967.5.0 and 1967.4.0, has a regression with POSIX timers. The fix is in 4.14.97, see kernel release notes https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.97 under "posix-cpu-timers: Unbreak timer rearming".
This is the same bug as reported in https://bugzilla.redhat.com/show_bug.cgi?id=1662602
This breaks some tests that we run in Bitbucket pipelines, which seem (according to reported kernel version) to run Container Linux.
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