I am getting randomly the 502 bad gateway on my site. When I check the hhvm logs I am getting this error:
Fatal error: Class undefined: Mage_Facebookfree_Helper_Active in /mypath/Mage.php on line 547
The Belvg/Facebookfree module is disabled from admin panel and from modules/Belvg_Facebookfree.xml
<active>false</active>
Also I commented all of the code when the helper is called from the design folder. What should I try more ? and why I am getting this error randomly ? thx
UPDATE After I removed the line from core_config_data I got again 502 and in the logs i got this message:
SlowTimer [1308ms] at runtime/ext_mysql: slow query: SELECT COUNT(*) AS `count` FROM `mydb`.`catalog_product_entity_datetime` WHERE (CONVERT(`value_id` USING utf8) LIKE '%advanced/modules_disable_output%' OR CONVERT(`entity_type_id` USING utf8) LIKE '%advanced/modules_disable_output%' OR CONVERT(`attribute_id` USING utf8) LIKE '%advanced/modules_disable_output%' OR CONVERT(`store_id` USING utf8) LIKE '%advanced/modules_disable_output%' OR CONVERT(`entity_id` USING utf8) LIKE '%advanced/modules_disable_output%' OR CONVERT(`value` USING utf8) LIKE '%advanced/modules_disable_output%')
this is one of the many tables. There is multiple slow timer errors
catalog_product_entity_datetime
andadvanced/modules_disable_output