Schema Verification
When you click Next, the Installer tries to connect to the schema that you specified. If the connection fails, this error is generated:
Could not create JDBC connection:
The second half of the message contains specific details about the failure. Some common errors and solutions are:
Error
Solution
The TCP/IP connection to the host xxx, port yyy has failed
Verify that the specified Database type is correct. Also ensure that is available and accessible through your firewall
 
The Network Adapter could not establish the connection
Communications link failure
 
Verify that the specified Host Name and Port Number are correct.
Check that your Internet connection is up.
 
Unknown database "xxxx":
 
Verify that the specified Database Schema Name is correct.
 
Access denied for user "nnn@mmm" (using password: YES)
 
Verify that the specified Database Username is correct. Also verify that the specified values in the Password fields are correct and equal.