Client connetion problem after long delay

Hi all,

I have configured the Streamline Highly Availability and Load Balancing with 2 
server (Server A and Server B). The ldirectord.cf is configured to monitor and 
assigned weighting at port 8000 for both server

Ultramonkey is started up at server A only
A tcp application listening at port 8000 is started up at server B 

ipvsadm show that the virtual ip will route traffic to server B  8000 port. 

I have a tcp client written and pump traffic to the virtual ip at port 8000. 
All is well when the pumping speed is high. However, when i try to introduce a 
long delay between each pump, say for example, 10 second, the client throw 
connection exception 

java.net.SocketException: Connection reset
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
        at java.io.DataOutputStream.write(DataOutputStream.java:85)
        at java.io.FilterOutputStream.write(FilterOutputStream.java:80)
        at java.io.DataOutputStream.writeUTF(DataOutputStream.java:360)
        at java.io.DataOutputStream.writeUTF(DataOutputStream.java:300)
        at com.primecreation.mms.TCPSender.send(TCPSender.java:124)
        at com.primecreation.mms.TCPSender.main(TCPSender.java:196)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)


I am using the same connection between each pump and doesn't close the 
connection.

Noted that I have used the same client to make test on the real ip and doesn't 
have this problem and this problem occur only when there is a long delay 
between each pump for the virtual ip. 

netstat -na|grep 8000 at server B  show that there is a ESTABLISHED connection 
from the client machine to the vitual ip and this ESTABLISHED connection 
doesn't vanish for a long time even the client connection has broken. 

The behaviour the completely different if I start up the application at server 
A instead. The client can send packet to server A through the virutal IP 
between each long delay pump. 

Any suggestion? Thx a lot


Eric










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