oracel client JDBC Driver Failed To register, and Forcibly stopped, please help me in resolving this

[PankajKumar Mishra]

Dear friendz, I am using Tomcat Apache server 6.x on Netbeans 6.1 plate-form.
I have created a Struts based application. That usage user authentication to use its home page.
That authentication usage database connection and db con use (oracle.jdbc.OracleDriver thin client driver).
Generates following error at the time tomcat stopping.
Help me in resolving following problem.

Way to register is --> Class.foreName("oracle.jdbc.OracleDriver"); and place is Context Listener Servlet during load of application server.

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Dec 21, 2011 6:39:50 PM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8086
Dec 21, 2011 6:39:53 PM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
Dec 21, 2011 6:39:56 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/MyStrutsOne] registered the JDBC driver [oracle.jdbc.driver.OracleDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Dec 21, 2011 6:39:59 PM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8086
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Thanks in advance, Please help me!