Hi David Murray,
Thanks for replying.

I have mentioned that my client and server are running on same host. So communication is going through localhost address.

I have checked for possible reasons of connection reset by peer error, below are the possible causes,

1) The machine is connected to the network, and the network is not responsive. 
2) The other side of the connection is not running normally. 
3) There are not enough system resources available. Free up system resources if they are running low. 

Possibility for 1 and 2 are not applicable as it is loopback communication.

For Possibility 3, I have already checked system resource and there are enough resources. 

You can check below stack overflow link.
http://stackoverflow.com/questions/1434451/what-does-connection-reset-by-peer-mean?rq=1