Mina exception help

[Jack (Renjie) Li]

Hi all,
        When I use mina, I always get the exception:
java.io.IOException: An established connection was aborted by the software in 
your host machine
                at sun.nio.ch.SocketDispatcher.write0(Native Method)
                at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
                at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104)
                at sun.nio.ch.IOUtil.write(IOUtil.java:75)
                at 
sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
                at 
org.apache.mina.transport.socket.nio.SocketIoProcessor.doFlush(SocketIoProcessor.java:414)
                at 
org.apache.mina.transport.socket.nio.SocketIoProcessor.doFlush(SocketIoProcessor.java:332)
                at 
org.apache.mina.transport.socket.nio.SocketIoProcessor.access$4(SocketIoProcessor.java:304)
                at 
org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProcessor.java:488)
                at 
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)


                Client number is about 4000. How would I fix the issue? Thanks!