While JBOSS5.1.0 GA running, there was an exception log in server.log like:

2012-05-30 07:43:43,176 INFO  (main)[org.jboss.bootstrap.microcontainer.ServerImpl] JBoss (Microcontainer) [5.1.0.GA (build: SVNTag=JBoss_5_1_0_GA date=200905221053)] Started in 38s:998ms

2012-06-26 21:00:08,515 ERROR (WorkerThread#0[2001:1890:1001:240c:0:0:0:4:50783])[org.jboss.remoting.transport.socket.ServerThread] WorkerThread#0[2001:1890:1001:240c:0:0:0:4:50783] exception occurred during first invocation

java.lang.reflect.InvocationTargetException

         at sun.reflect.GeneratedConstructorAccessor422.newInstance(Unknown Source)

         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)

         at org.jboss.remoting.transport.socket.ServerThread.createServerSocketWrapper(ServerThread.java:909)

         at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:491)

         at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)

Caused by: java.io.EOFException

         at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2281)

         at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2750)

         at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780)

         at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)

         at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:100)

         at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)

         at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:75)

         at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:58)

         at org.jboss.remoting.transport.socket.ClientSocketWrapper.createInputStream(ClientSocketWrapper.java:179)

         at org.jboss.remoting.transport.socket.ClientSocketWrapper.createStreams(ClientSocketWrapper.java:162)

         at org.jboss.remoting.transport.socket.ClientSocketWrapper.<init>(ClientSocketWrapper.java:66)

         at org.jboss.remoting.transport.socket.ServerSocketWrapper.<init>(ServerSocketWrapper.java:46)

         ... 6 more

And we checked the 3873 using "netstat -antp" command. Don't know when this port was closed.

Could someone tell me how to prevent it or the root cause. Thanks in advance.

From Richard Zhang.