-8888: SERVERDB not accessible 

Explanation:

The attempt was made to start a database session. This is impossible for one of the following reasons:

...

       1.      The database name was specified incorrectly

       2.      The database instance has not yet been started.

User Action:

...

       1.      Check the specified database name.

       2.      Start the database instance. Pay attention to errors that might occur.