at least one pool section must be specified in config file

PHP启动不了，提示：
ERROR: No pool defined. at least one pool section must be specified in config file
[21-Feb-2022 11:30:43] ERROR: failed to post process the configuration
[21-Feb-2022 11:30:43] ERROR: FPM initialization failed
failed

解决方案：
进入其他可启动的PHP版本里面，如 /www/wdlinux/phps/71/etc，复制  php-fpm.conf  这个文件内容，把里面出现的 “71” 都改成相应的版本，粘贴到要使用的PHP版本里面即可

[global]

pid = /www/wdlinux/phps/73/var/run/php-fpm.pid

error_log = /www/wdlinux/phps/73/var/log/php-fpm.log

log_level = notice

[www]

listen = /tmp/php-73-cgi.sock

listen.backlog = -1

listen.allowed_clients = 127.0.0.1

listen.owner = www

listen.group = www

listen.mode = 0666

user = www

group = www

pm = dynamic

pm.max_children = 12

pm.start_servers = 2

pm.min_spare_servers = 2

pm.max_spare_servers = 6

pm.max_requests = 2000

request_terminate_timeout = 60