Tomcat server shutting down after few seconds its start

Im having some strange problem on my tomcat server at ubuntu pc its can start after start with in few seconds its goes to shutting down . still i could not up the tomcat server

my server.xml have no error i change the ports also no luck still

this is my config

<Connector port="8080" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" />

any help?

my catalina.out error log saying

Oct 11, 2011 6:34:00 AM org.apache.catalina.startup.Catalina start
SEVERE: Catalina.start: 
LifecycleException:  service.getName(): "Catalina";  Protocol handler start failed: java.net.BindException: Address already in use <null>:8080
    at org.apache.catalina.connector.Connector.start(Connector.java:1094)
    at org.apache.catalina.core.StandardService.start(StandardService.java:534)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
    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:616)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Oct 11, 2011 6:34:00 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 23691 ms
Oct 11, 2011 6:34:00 AM org.apache.catalina.core.StandardServer await
SEVERE: StandardServer.await: create[8080]: 
java.net.BindException: Address already in use
    at java.net.PlainSocketImpl.socketBind(Native Method)
    at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:353)
    at java.net.ServerSocket.bind(ServerSocket.java:336)
    at java.net.ServerSocket.<init>(ServerSocket.java:202)
    at org.apache.catalina.core.StandardServer.await(StandardServer.java:373)
    at org.apache.catalina.startup.Catalina.await(Catalina.java:662)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:614)
    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:616)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Oct 11, 2011 6:34:00 AM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8080
Oct 11, 2011 6:34:00 AM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
Oct 11, 2011 6:34:01 AM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
Oct 11, 2011 6:34:01 AM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080
Oct 11, 2011 6:34:08 AM org.apache.catalina.connector.MapperListener destroy
WARNING: Error unregistering MBeanServerDelegate
java.lang.NullPointerException
    at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:176)
    at org.apache.catalina.connector.Connector.stop(Connector.java:1135)
    at org.apache.catalina.core.StandardService.stop(StandardService.java:596)
    at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
    at org.apache.catalina.startup.Catalina.stop(Catalina.java:648)
    at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:692)
Oct 11, 2011 6:34:08 AM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080
Oct 11, 2011 6:34:08 AM org.apache.catalina.connector.Connector stop
SEVERE: Coyote connector has not been started
Oct 11, 2011 6:34:09 AM org.apache.catalina.connector.MapperListener destroy
WARNING: Error unregistering MBeanServerDelegate
java.lang.NullPointerException
    at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:176)
    at org.apache.catalina.connector.Connector.stop(Connector.java:1135)
    at org.apache.catalina.core.StandardService.stop(StandardService.java:596)
    at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
    at org.apache.catalina.startup.Catalina.stop(Catalina.java:648)
    at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:692)
Oct 11, 2011 6:34:09 AM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080
Oct 11, 2011 6:34:09 AM org.apache.catalina.connector.Connector stop
SEVERE: Coyote connector has not been started
Oct 11, 2011 6:34:09 AM org.apache.catalina.connector.MapperListener destroy
WARNING: Error unregistering MBeanServerDelegate
java.lang.NullPointerException
    at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:176)
    at org.apache.catalina.connector.Connector.stop(Connector.java:1135)
    at org.apache.catalina.core.StandardService.stop(StandardService.java:596)
    at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
    at org.apache.catalina.startup.Catalina.stop(Catalina.java:648)
    at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:692)
Oct 11, 2011 6:34:09 AM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080
Oct 11, 2011 6:34:09 AM org.apache.catalina.connector.Connector stop
SEVERE: Coyote connector has not been started