Alert subscription data source module encountered errors while running

Dear All please answer this critical Alert below :

Alert subscription data source module encountered errors while running: Alert subscription data source module was unable to find alerts that match the subscription because of database errors.

The following error(s) were encountered:

Exception Message: ExecuteScalar requires an open and available Connection. The connection's current state is closed.



One or more workflows were affected by this.


Workflow name: Microsoft.SystemCenter.DataWarehouse.CollectAlertData

Instance name: 8f17e6e2-bada-4fd7-8901-f46a985faf64

Instance ID: {0982866A-5BEA-AF9B-9C53-8E330B54E38E}