2015-08-19T10:36:56-0400: [Worker(delayed_job.0 host:telx-guijobs-93 pid:13395)] Job ProcessCampaignJob (id=40482) FAILED (0 prior attempts) with ActiveRecord::StatementInvalid: Mysql2::Error: closed MySQL connection: DELETE FROM `tmp_campaign_uploaded_listeners` WHERE `tmp_campaign_uploaded_listeners`.`main_campaign_id` = 61233