PHP Warning: Module 'redis' already loaded in Unknown on line 0

[dandrikop]

Hello,

I'm using a Redis instance for Sessions and a separate Redis instance for Cache on Magento 1.9.4.5 with PHP 7.2. Upon every HTTP request, I see the below line at the file error_log:

PHP Warning: Module 'redis' already loaded in Unknown on line 0

I don't know which of the two modules Cm_RedisSession or Cm_Cache_Backend_Redis is responsible for that.

I believe that this warning occurs below ISP has installed Redis module for PHP (see attached screenshot from phpinfo). This line fills up my log file. Is there any way to suppress this warning in the Cm_RedisSession or Cm_Cache_Backend_Redis modules, or the only solution is to remove Redis module from PHP?

[colinmollenhour]

The PHP code just checks to see if a class is defined, there is no loading. So I suspect your webhost's config has the module included twice somehow (e.g. extension=redis.so exists both in php.ini and also in conf.d/redis.ini)