Last Wednesday morning our site, LifeTwo.com, suddenly stopped responding to user requests. Our host's error log showed
Premature end of script headers: /home/(our account)/public_html/production/index.php
On a browser it shows as Apache error 500.
We had made no changes to the site for several days. The last changes were disabling tagadelic.module and making a minor css edit. Twenty minutes after the first errors, the hourly cron failed for the first time ever.
Our hosting company, Lunarpages, says they've made no changes to the server. We're running 4.7(.6?) and have been for a while.
Someone who knows more than me looked at this for a bit and wrote "In trying to trace the "Premature end of script" errors, I was able to determine that the problem occurs within the drupal_page_footer() call. I also noticed that each time this error occurred, a new core file was being generated in the production directory. This indicates to me that there is a problem with one of your modules (druapl_page_footer calls hook_exit on all modules) and that one of the modules is causing a core dump. I am sorry to say that I have not been able to figure out which module is causing the problem."