请教registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister

[yschat2012]

部署JSP时出现：
[/openmeetings] startup failed due to previous errors
2013-01-04 22:51:25,676 [main] ERROR o.a.c.loader.WebappClassLoader - The web application [/openmeetings] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2013-01-04 22:51:25,676 [main] ERROR o.a.c.loader.WebappClassLoader - The web application [/openmeetings] registered the JDBC driver [org.apache.derby.jdbc.AutoloadedDriver40] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2013-01-04 22:51:25,676 [main] ERROR o.a.c.loader.WebappClassLoader - The web application [/openmeetings] registered the JDBC driver [org.apache.derby.jdbc.ClientDriver40] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2013-01-04 22:51:25,676 [main] ERROR o.a.c.loader.WebappClassLoader - The web application [/openmeetings] registered the JDBC driver [org.postgresql.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
请教高手，这是什么问题？我已经把mysql-connector-java-5.1.22-bin.jar包导入到openmeetings\webapps\openmeetings\WEB-INF\lib目录下了。怎么解决？谢谢！！

[yschat2012]

没人知道吗？算了，谁回帖我都给分！！

[yschat2012]

救救我啊!!

[z_yes163]

2、在tomcat的server.xml文件中，把 <!-- Prevent memory leaks due to use of particular java/javax APIs--> <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>这个监听给关了 然后你 不要使用tomcat 6.0 还使用tomcat 5.5

[十三朝毛驴]

将你的数据库驱动jar包移动到tomcat本身的lib文件夹下；不要将数据库驱动jar包引用添加到你的项目中；

[十三朝毛驴]

其实这个问题不是你项目本身的问题，是数据库jar包或者tomcat本身的问题；你可以降低你的tomcat版本去规避这个问题；