MAGETWO-84646: Cron jobs incorrect behavior when running job terminated

Author: Oleksandr Iegorov

app/code/Magento/Cron/Model/ResourceModel/Schedule.php

@@ -76,7 +76,7 @@ public function trySetJobUniqueStatusAtomic($scheduleId, $newStatus, $currentSta
             ->where('current.schedule_id = ?', $scheduleId)
             ->where('current.status = ?', $currentStatus)
             ->where('existing.schedule_id IS NULL')
-            ->where('existing.executed_at > UTC_TIMESTAMP() - INTERVAL 1 DAY'); //hotfix
+            ->where('existing.executed_at IS NULL'); //hotfix
 
         $update = $connection->updateFromSelect($selectIfUnlocked, ['current' => $this->getTable('cron_schedule')]);
         $result = $connection->query($update)->rowCount();