drush

I ran into a WSOD on a Drupal site and checking the Drupal 7 log showed me the following:

PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'foo.image_dimensions' doesn't exist: SELECT * FROM {image_dimensions} id WHERE id.fid IN (:fids_0, :fids_1,

Installing Aegir 2 on a fresh install of Ubuntu Saucy in a Virtualbox, I ran into the following message:

The drush command '@hostmaster pm-enable hosting_queued' could not be found.

To fix this run, sudo mysql_secure_installation and ensure that you remove anonymous users. This should do the trick.

I upgraded the Mollom module on this site from the 7.1.x version to the newer branch of 7.2.x and ran into a White Screen of Death (WSOD). Checking the logs pointed me to the Mollom error:

Class 'MollomDrupal' not found

It's tough to fix this as you might not be able to even log into the site to get to the admin page. Therefore, you will need to disable the module from the database.

Once you are able to log in, you should clear all caches from admin/config/development/performance.