Linux系统下，Tomcat启动有时报Address already in use<null>:8080
我知道 是端口被占用，可是第一次启动就是成功的，再关闭后，重启就报错，具体错误码信息如下：

2010-10-24 18:12:23 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/local/jdk1.5.0_06/jre/lib/i386/server:/usr/local/jdk1.5.0_06/jre/lib/i386:/usr/local/jdk1.5.0_06/jre/../lib/i386:/opt/sybase/OCS-12_5/lib:/opt/sybase/OCS-12_5/lib3p:/opt/sybase/SQLRemote/lib:/opt/sybase/ASE-12_5/lib:/opt/sybase/OCS-12_5/lib:/opt/sybase/OCS-12_5/lib3p:/opt/sybase/SQLRemote/lib:/opt/sybase/ASE-12_5/lib:
2010-10-24 18:12:23 org.apache.coyote.http11.Http11Protocol init
严重: Error initializing endpoint
java.net.BindException: Address already in use<null>:8080
        at org.apache.tomcat.util.net.JIoEndpoint.init(JIoEndpoint.java:502)
        at org.apache.coyote.http11.Http11Protocol.init(Http11Protocol.java:176)
        at org.apache.catalina.connector.Connector.initialize(Connector.java:1058)
        at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
        at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:795)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:530)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:550)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:260)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
2010-10-24 18:12:23 org.apache.catalina.startup.Catalina load
严重: Catalina.start
LifecycleException:  Protocol handler initialization failed: java.net.BindException: Address already in use<null>:8080
        at org.apache.catalina.connector.Connector.initialize(Connector.java:1060)
        at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
        at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:795)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:530)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:550)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at