jetty occasionally wedges with noclassdeffounderror

Hi-
I'm using 5.0RC0 embedded in a custom app on a RHEL3.0 machine. I have  
two instances of Jetty listeners. About once a week or so, my listeners  
wedge and I start seeing socket unavailable errors. Netstat shows  
nobody is connected to those two listeners. When I kill-9 the app and  
the two listeners get shutdown events, I get a flood of these stack  
traces. Probably one for each of the 1024 connections that can be  
available.

I don't really understand this exception. Can anyone give me a clue? I  
think it would help me figure out why my app is having these  
intermittent problems.

java.lang.NoClassDefFoundError
        at  
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at  
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at  
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown  
Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:180)
        at  
org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java: 
297)
        at  
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:335)
        at  
org.mortbay.jetty.servlet.ServletHandler.dispatch(ServletHandler.java: 
605)
        at  
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: 
512)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1442)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1394)
        at org.mortbay.http.HttpServer.service(HttpServer.java:879)
        at  
org.mortbay.http.HttpConnection.service(HttpConnection.java:821)
        at  
org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:988)
        at  
org.mortbay.http.HttpConnection.handle(HttpConnection.java:838)
        at  
org.mortbay.http.SocketListener.handleConnection(SocketListener.java: 
212)
        at  
org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:315)
        at  
org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:510)



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