title: Only one usage of each socket address (protocol/network address/port) is normally permitted while tomcat start?
body: <p>Here is my connector element in server.xml. I also tried using 8443 instead of 8484 but same error.</p>
  
  <pre><code>&lt;Connector 
    SSLEnabled="true" 
    acceptCount="100" 
    connectionTimeout="20000" 
    executor="tomcatThreadPool" 
    keystoreFile="D:/.keystore" 
    keystorePass="changeit" 
    maxKeepAliveRequests="15" 
    port="8484" 
    protocol="HTTP/1.1" 
    redirectPort="8484" 
    scheme="https" 
    secure="true" 
    allowUnsafeLegacyRenegotiation="true"/&gt;
  
  
  
  SEVERE: Error starting endpoint
  java.lang.Exception: Socket bind failed: [730048] Only one usage of each socket address (protocol/network address/port) is normally permitted.  
      at org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:649)
      at org.apache.tomcat.util.net.AprEndpoint.start(AprEndpoint.java:766)
      at org.apache.coyote.http11.Http11AprProtocol.start(Http11AprProtocol.java:137)
      at org.apache.catalina.connector.Connector.start(Connector.java:1122)
      at org.apache.catalina.core.StandardService.start(StandardService.java:540)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
      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:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  
  Jan 23, 2014 10:05:26 AM org.apache.catalina.core.StandardService start
  SEVERE: Failed to start connector [Connector[HTTP/1.1-8484]]
  LifecycleException:  service.getName(): "Catalina";  Protocol handler start failed: java.lang.Exception: Socket bind failed: [730048] Only one usage of each socket address (protocol/network address/port) is normally permitted.  
      at org.apache.catalina.connector.Connector.start(Connector.java:1129)
      at org.apache.catalina.core.StandardService.start(StandardService.java:540)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
      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:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  </code></pre>
  
  <p>i am sure no other app is using ports(8484 or 8443) as verified with <a href="https://stackoverflow.com/questions/3634707/tomcat-start-up-error">Tomcat start up error</a>.
        i am not sure what is the actual cause ?</p>