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tomcat startup error, please help

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Hello all:
Can someone please explain to me what the following error message mean? It happens when I shutdown the tomcat server,(seems to be successful) then start it up.
Does it mean something is running on port 8080? How do I check what is running on 8080? And how do I stop them? I am pretty sure no other web server is running on 8080, so I suspect the previous Tomcat instance was not deleted successfully, how to check and solve?
java.lang.reflect.InvocationTargetException: org.apache.tomcat.core.TomcatExcept
ion: Root cause - Address already in use
at org.apache.tomcat.modules.server.PoolTcpConnector.engineStart(Unknown
at org.apache.tomcat.core.ContextManager.start(Unknown Source)
at org.apache.tomcat.startup.EmbededTomcat.start(Unknown Source)
at org.apache.tomcat.startup.EmbededTomcat.execute1(Unknown Source)
at org.apache.tomcat.startup.EmbededTomcat$1.run(Unknown Source)
at org.apache.tomcat.util.compat.Jdk12Support$PrivilegedProxy.run(Unknow
n Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.tomcat.util.compat.Jdk12Support.doPrivileged(Unknown Sourc
at org.apache.tomcat.startup.EmbededTomcat.execute(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.tomcat.util.IntrospectionUtils.execute(Unknown Source)
at org.apache.tomcat.startup.Main.execute(Unknown Source)
at org.apache.tomcat.startup.Main.main(Unknown Source)
Stephen Wei
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Hi, now I think I know what is wrong, but not why.
I think the problem is that I can not shutdown my tomcat server now for some reason. I use ./shutdown.sh command in the /bin directory. But it gives me the following message..
Using classpath: ./../lib/tomcat.jar
Using JAVA_HOME: /usr/java/jdk1.3.1_01
Using TOMCAT_HOME: /usr/local/tomcat3.3
Stopping Tomcat.
Can't read /usr/local/tomcat3.3/conf/ajp12.id
What does the above mean? It means shutdown fails right? How to solve?
Now I point my browser to tomcat top page, I can still see the welcome page and link through them, so I suppose tomcat is still running after I tried to shut it down. Why?
Please help! Thanks!
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