> org.firebirdsql.jdbc.FBSQLException: Resource Exception. Unable to
> complete network request to host "10.10.10.18".
> Reason: Unable to complete network request to host "10.10.10.18".

Most likely your database server 10.10.10.18 is not visible for your
second tomcat. Can it be that they are in different subnets?

Try to ping your database server. Also try "telnet 10.10.10.18 3050".
If latter does not succeed, you have network problem.

Roman