Failed database requests can sometimes cause a database instance to appear twice.
A single instance of a Microsoft SQL or DB2 database is displayed as two separate database members in the Application View, once with the database name in the form of host:port/schema, and once with as a hash value.
Within a selected five-minute period, a Microsoft SQL or DB2 database instance receives some requests that successfully connect to the database and some requests which fail to connect to the database. When a request cannot connect to the database, the database name appears as a hash value. If the five-minute period comprises requests that successfully connect and requests that fail to connect, the database appears as two separate members.
Failed requests might be caused by a user error (such as database credentials), an offline database, or other reasons.
Check the connection to the database:
To show the database connection string in the Application View
The hash value is a security measure to prevent accidentally revealing sensitive information that might be displayed in the database connection string. As a troubleshooting measure, you can change the hash value to show the database connection string, which might help you find the source of the problem.
In the agent policy, change the
display.db.connection.string.unrecognized.format property to