java - Tomcat中web项目的启动异常

今天突然发现tomcat能正常运行，但其下的的web项目却运行不了了。
重复关闭启动tomcat都不行，看了日志之后发现它报了这么一个错误:

09-Nov-2016 13:25:26.985 警告 [localhost-startStop-2] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [streetLight] 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.
09-Nov-2016 13:25:26.986 警告 [localhost-startStop-2] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [streetLight] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 java.lang.Object.wait(Object.java:503)
 java.util.TimerThread.mainLoop(Timer.java:526)
 java.util.TimerThread.run(Timer.java:505)
09-Nov-2016 13:25:26.992 信息 [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"]
09-Nov-2016 13:25:26.995 信息 [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"]
09-Nov-2016 13:25:26.997 信息 [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"]
09-Nov-2016 13:25:26.999 信息 [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8009"]

项目下午就需要展示了，突然来了这么一下，让我不知所措。希望各位能伸予援助之手啊。谢谢。～