java ee开发报错

七月 26, 2015 9:57:52 下午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["ajp-nio-8009"]
七月 26, 2015 9:57:52 下午 org.apache.coyote.AbstractProtocol destroy
严重: Failed to destroy end point associated with ProtocolHandler ["ajp-nio-8009"]
java.lang.NullPointerException
 at org.apache.tomcat.util.net.NioEndpoint.releaseCaches(NioEndpoint.java:302)
 at org.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:473)
 at org.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:818)
 at org.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:532)
 at org.apache.catalina.connector.Connector.destroyInternal(Connector.java:1023)
 at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)
 at org.apache.catalina.core.StandardService.destroyInternal(StandardService.java:588)
 at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)
 at org.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:859)
 at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:629)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)

文件解决十分的纠结……忙碌了一个下午，愣是没结果。大概知道自己的问题出在Tomcat上，但是卸载重装了几次也不管用的