Tomcat fails to start because of jdbc driver loading

Question

Here's the relevant portion of the tomcat startup log:

SEVERE: Context [/f360] startup failed due to previous errors
Apr 8, 2010 6:45:56 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: A web application registered the JBDC driver [org.apache.derby.jdbc.ClientDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Apr 8, 2010 6:45:56 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: A web application registered the JBDC driver [oracle.jdbc.OracleDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Apr 8, 2010 6:45:56 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: A web application registered the JBDC driver [com.microsoft.sqlserver.jdbc.SQLServerDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.

The problem that it causes is that it basically causes the web app to fail to startup properly.

Any ideas how to fix this?

Answer 1

The SEVERE messages regarding JDBC drivers are caused by a DBCP issue. See DBCP-332