I'm noticing more and more often that when I start to install an addon, doesn't matter which one, most recent issue was the Xenforo Media Gallery 1.1.0 RC1 that after starting the upgrade, I'll eventually get a white page and numerous database errors. My site is acting like it's failing to install or update addons that make changes to database tables. I have to try numerous times to get this addons to upgrade/install addons.
Could it be a problem with MySQL or a timeout issue?
No, I do have quite a few addons installed. I opened a support ticket this morning with my host (Wiredtree) and they didn't really help me out all that much. They upgraded my cPanel to the latest version but never could pinpoint any of my issues.
Usually the database errors refer to the addons that haven't been fully installed. Specifically with the Xenforo Media Gallery, I'd start the upgrade, my browser would start the loading process, nothing would happen (such as reparsing/rebuilding) and then I'd get a white page, the page would go blank. The addon wouldn't be upgraded yet database tables would be altered. It's like with any addon recently that alters tables, I have trouble installing it.