This article helps to find the solutions to the issues you may observe in Smart Assurance UI. When Live Notifications are not Appearing to UI If Live Notification are not appearing to UI, perform these steps: When Service Unavailable Error Appears Follow these troubleshooting steps if service unavailable error appears in UI: When Cluster is Down If the Cluster Down error appears in UI, perform these steps: When Connections cannot be Established with Smarts Tomcat ServicePerform these steps to troubleshoot the issue connections cannot be established with Smarts Tomcat Service: When Connections cannot be Established with Smarts Presentation servicePerform these steps when Connections cannot be established with the Smarts Presentation service issue observed. When "Result window is too large, from + size must be less than or equal to: " Message Appears The message "Result window is too large, from + size must be less than or equal to: " is displayed in UI when the user tries to access Notifications greater than 10,000. When Request Timeout Message AppearsIf "Request Timeout has happened. Please increase the timeout period” or “Gateway Timeout" message appears when you take any actions on Notifications, perform these troubleshooting steps: When Controller Service Fails to Start in DCFThis section describe how to troubleshoot if Controller Service fails to start in DCF.