Hi Kavya,
Are your nodes listening?
node$ cat /etc/puppet/puppet.conf
[...]
[agent]
listen = true
[...]
Firewall allowing that port?
node# lsof -i -n -P | grep 8139
puppet 2582 root 5u IPv4 7214 0t0 TCP *:8139 (LISTEN)
node# iptables -L -v -n | grep 8139
2 120 ACCEPT tcp -- * * 10.1.1.1
0.0.0.0/0
tcp dpt:8139
-mz