tomcat 4.1.27: cannot shutdown tomcat !!

[Fabio Bazzani]

I'm working with JDK 1.4.0 and tomcat 4.1.27.
I'm in advanced development and unexpectedly I cannot shutdown Tomcat.
I spent all day to try undertand the why ?

shell error message:

Stopping service Tomcat-Standalone
java.net.NoRouteToHostException: No route to host: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:295)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:159)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:148)
        at java.net.Socket.connect(Socket.java:425)
        at java.net.Socket.connect(Socket.java:375)
        at java.net.Socket.<init>(Socket.java:290)
        at java.net.Socket.<init>(Socket.java:146)
        at org.apache.jk.common.ChannelSocket.destroy(ChannelSocket.java:384)
        at org.apache.jk.server.JkMain.stop(JkMain.java:311)
        at org.apache.jk.server.JkCoyoteHandler.destroy(JkCoyoteHandler.java:181)
        at org.apache.coyote.tomcat4.CoyoteConnector.stop(CoyoteConnector.java:1205)
        at org.apache.catalina.core.StandardService.stop(StandardService.java:546)
        at org.apache.catalina.core.StandardServer.stop(StandardServer.java:2225)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:543)
        at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
        at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
        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:324)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)

Does anybody know what happened ?

Thank you.

Fabio