process: handle possible fio.read errors
#527
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olegrok
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patapenka-alexey
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oleg-jukovec
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oleg-jukovec
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Oct 9, 2025
Once I catched an error during tests: ``` tarantool/override/metrics/psutils/psutils_linux.lua:49: bad argument #1 to 'string.split' (string expected, got nil) ``` That shows that in some rare cases fio.read can return `nil, err` but before this patch this case was unhandled. This patch fixes it. Also it was pretty strange to print a message via "print" function. It was changed to "log" module that is more native for tarantool. This patch doesn't contain tests because it's pretty hard to reproduce such error (file was opened but `file:read()` returned an errors for some reasons). Closes #526
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oleg-jukovec
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Once I catched an error during tests:
That shows that in some rare cases fio.read can return
nil, errbut before this patch this case was unhandled. This patch fixes it.Also it was pretty strange to print a message via "print" function. It was changed to "log" module that is more native for tarantool.
This patch doesn't contain tests because it's pretty hard to reproduce such error (file was opened but
file:read()returned an errors for some reasons).Closes #526