I installed nginx, php, php-fpm, php-pecl-redis by yum.
All of them work but the last one.
When I run /usr/sbin/php-fpm, I got this:
/usr/sbin/php-fpm
just resolve the same problem:
php-pecl-redis installed by yum will cause this problem. so you need to install the php-redis manually. wget the package and phpize - configure - make ....