Explanation of pear's include path, and why Drush cr clears it?

Question

I got an error message when trying to import Drupal configuration with drush cim, saying the following:

include_once(/var/www/d8site/modules/custom/somemodule/somemodule.module):[warning] failed to open stream: No such file or directory Extension.php:140 include_once(): Failed opening [warning] '/var/www/d8site/modules/custom/somemodule/somemodule.module' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') Extension.php:140

The somemodule.module file was deleted between versions, but it's still expecting it. Restarting and/or reloading Apache didn't get rid of this message, but drush cr did. I don't want to have to clear the entire Drupal cache on production, so how could I update this include list without clearing all cache with drush? If I didn't have pear installed, would this be any different?

Answer 1

Pear has no connection to this. The error message displays the include path value in brackets for debugging purpose. You can check the value as follows:

drush ev 'print get_include_path();'

In your case the PHP is trying to include the file from this location and emits the error as it fails. /var/www/d8site/modules/custom/somemodule/somemodule.module

My guess the file still presents in Drupal registry because the module wasn't uninstalled properly. Check out this guide to fix it. https://www.drupal.org/node/2487215