我的服务器中有2个运行的tomcat

一个是Tomcat 7，另一个是tomcat 8，第一个的配置文件server.xml是：

           <Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" />
             ...
           <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

在第二个tomcat中有：

            <Connector port="8080" protocol="HTTP/1.1"
            connectionTimeout="20000"
            redirectPort="8443" />
            ...
            <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

但是当我运行第一个tomcat时，控制台说

java.net.BindException: Address already in use: JVM_Bind
at java.net.DualStackPlainSocketImpl.bind0(Native Method)
at java.net.DualStackPlainSocketImpl.socketBind(Unknown Source)
at java.net.AbstractPlainSocketImpl.bind(Unknown Source)
at java.net.PlainSocketImpl.bind(Unknown Source)
at java.net.ServerSocket.bind(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at org.apache.catalina.core.StandardServer.await(StandardServer.java:420)
at org.apache.catalina.startup.Catalina.await(Catalina.java:713)
at org.apache.catalina.startup.Catalina.start(Catalina.java:659)
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)

但是第二次运行良好，我使用命令netstate -t​​nao并验证了端口是否可用