Tomcat 6.0.32 +Spring dbcp datasource关闭Tomcat出现严重异常

信息: Pausing Coyote HTTP/1.1 on http-8080
2014-3-6 14:52:50 org.apache.catalina.core.StandardService stop
信息: Stopping service Catalina
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/tsmanager] 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.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-1] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-2] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-3] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-4] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-5] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-6] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-7] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-8] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-9] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/tsmanager] appears to have started a thread named [scheduler_Worker-10] but has failed to stop it. This is very likely to create a memory leak.
2014-3-6 14:52:50 org.apache.coyote.http11.Http11Protocol destroy
信息: Stopping Coyote HTTP/1.1 on http-8080
[QC] INFO [main] org.springframework.context.support.AbstractApplicationContext.doClose(1002) | Closing Root WebApplicationContext: startup date [Thu Mar 06 14:52:41 CST 2014]; root of context hierarchy
[QC] INFO [main] org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.stop(345) | Stopping beans in phase 2147483647
[QC] INFO [main] org.quartz.core.QuartzScheduler.standby(556) | Scheduler scheduler_$_yanshiying-PC1394088762202 paused.
[QC] INFO [main] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(422) | Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1ac7fbb: defining beans [dataSource,jdbcTemplate,xxtsService,wpushDao,httpUtil,cronService,clearDataJob,getNsrInfoJob,scheduler,quartzManager]; root of factory hierarchy
[QC] INFO [main] org.springframework.scheduling.quartz.SchedulerFactoryBean.destroy(760) | Shutting down Quartz Scheduler
[QC] INFO [main] org.quartz.core.QuartzScheduler.shutdown(635) | Scheduler scheduler_$_yanshiying-PC1394088762202 shutting down.
[QC] INFO [main] org.quartz.core.QuartzScheduler.standby(556) | Scheduler scheduler_$_yanshiying-PC1394088762202 paused.
[QC] INFO [main] org.quartz.core.QuartzScheduler.shutdown(707) | Scheduler scheduler_$_yanshiying-PC1394088762202 shutdown complete.

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>       
        <property name="url" value="jdbc:mysql://127.0.0.1:3306/wzhpush"/>       
        <property name="username" value="root"/>
        <property name="password" value="mysqladmin"/>   
 </bean>

import java.sql.DriverManager;
import java.sql.SQLException;
import org.apache.commons.dbcp.BasicDataSource;

/**
 * 解决 关闭Tomcat时报错：the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped
 * @author*/
public class WzhBasicDataSource extends BasicDataSource{
    @Override
    public synchronized void close() throws SQLException {
        DriverManager.deregisterDriver(DriverManager.getDriver(url));
        super.close();
    }
}