Fix GH-9754: SaltStack hangs when running php-fpm 8.1.11 #9852
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devnexen
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Oct 29, 2022
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SaltStack uses Python subprocess and redirects stderr to stdout which is then piped to the returned output. If php-fpm starts in daemonized mode, it should close stderr. However a fix introduced in phpGH-8913 keeps stderr around so it can be later restored. That causes the issue reported in phpGH-9754. The solution is to keep stderr around only when php-fpm runs in foreground as the issue is most likely visible only there. Basically there is no need to restore stderr when php-fpm is daemonized.
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SaltStack uses Python subprocess and redirects stderr to stdout which is then piped to the returned output. If php-fpm starts in daemonized mode, it should close stderr. However a fix introduced in GH-8913 keeps stderr around so it can be later restored. That causes the issue reported in GH-9754. The solution is to keep stderr around only when php-fpm runs in foreground as the issue is most likely visible only there. Basically there is no need to restore stderr when php-fpm is daemonized.