tomcat 异常：Caused by: org.apache.catalina.LifecycleException: The connector cannot start since the specified port value of [-1] is invalid

启动tomcat时出现异常：

 org.apache.catalina.LifecycleException: Failed to start component [Connector[AJP/1.3-auto-1]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:458)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:752)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:625)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)
Caused by: org.apache.catalina.LifecycleException: The connector cannot start since the specified port value of [-1] is invalid
        at org.apache.catalina.connector.Connector.startInternal(Connector.java:979)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 11 more

报了异常，但tomcat还是启动起来了，并且项目也可以访问，没发现其他异常，google了一下，说是这个异常可以被忽略，并不影响功能的使用，说是从安全层面避免其它服务或软件关闭tomcat.可参考：https://kb.acronis.com/es/node/54707   ;有时间再研究一下这个异常......