No. If that was a limit of requests error code would be 0 and severity of
message would be "NOTICE".
Exit code 255 usually means that cgi_main.c:main() has finished with "return
FAILURE". There are many such places in the code, and it's difficult to track
your case using a single message. Is that the only warning in log file ?
--
Andrei Nigmatulin
GPG PUB KEY 6449830D
Now I lay me down to sleep(3)
Pray the OS my core to keep
If I die before I wake
Pray the Disk my core to take
This could happen when php-fpm is stoped with '/usr/local/sbin/php-fpm stop'
or restarted with '/usr/local/sbin/php-fpm restart'.
In this case php processes are killed immediately even if requests are
executing. And user gets 502 error, which is probably not what you want. To
prevent this situation please use 'quit' and 'reload' commands
correspondingly.