服务器运行时间过长，就会抛出下面的异常
The web application [] 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.
The web application [] appears to have started a thread named [AWT-Windows] but has failed to stop it. This is very likely to create a memory leak.
The web application [] 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.
The web application [] appears to have started a thread named [AWT-Windows] but has failed to stop it. This is very likely to create a memory leak.
