mssql: login error: Cannot open database "1" that was requested by the login. Using the user default database "master" instead.

[sjchoen]

mssql: login error: Cannot open database "1" that was requested by the login. Using the user default database "master" instead.

I can see the text, but it's not actually used as a concatenation instead.
Is it a bug? or is it a sqlserver configuration issue?
If there is no problem with sqlserver settings, can it be used instead?
If I do not enter a database name, the default database is used.
If I enter the name of a database that does not exist as part, I see the text above and it does not connect to the default database.

Please let me know if it's a bug or some concept I don't know about.