I am getting this error on every outgoing request. 

Below are log entries i found

Sep 27 22:09:06 centos1 /usr/sbin/kamailio[22421]: ERROR: <core> [udp_server.c:550]: udp_send(): sendto(sock,0x7fb76f5da5e0,1568,0,10.3.4.2:5060,16): Invalid argument(22)

Sep 27 22:09:06 centos1 /usr/sbin/kamailio[22421]: CRITICAL: <core> [udp_server.c:555]: udp_send(): invalid sendtoparameters#012one possible reason is the server is bound to localhost and#012attempts to send to the net

Sep 27 22:09:06 centos1 /usr/sbin/kamailio[22421]: ERROR: <core> [forward.h:201]: msg_send_buffer(): udp_send failed

SNDTO values are

SNDTO ,10.3.4.2 PORT 5060

I have confirmed the PID and it is bound to my public IP

22417   main process - attendant

22418   udp receiver child=0 sock=10.3.4.1:5060

22419   udp receiver child=1 sock=10.3.4.1:5060

22420   udp receiver child=2 sock=10.3.4.1:5060

22421   udp receiver child=3 sock=10.3.4.1:5060

22422   udp receiver child=4 sock=10.3.4.1:5060

22423   udp receiver child=5 sock=10.3.4.1:5060

22424   udp receiver child=6 sock=10.3.4.1:5060

22425   udp receiver child=7 sock=10.3.4.1:5060

22426   udp receiver child=0 sock=127.0.0.1:5060

22427   udp receiver child=1 sock=127.0.0.1:5060

22428   udp receiver child=2 sock=127.0.0.1:5060

22429   udp receiver child=3 sock=127.0.0.1:5060

22430   udp receiver child=4 sock=127.0.0.1:5060

22431   udp receiver child=5 sock=127.0.0.1:5060

22432   udp receiver child=6 sock=127.0.0.1:5060

22433   udp receiver child=7 sock=127.0.0.1:5060

22434   slow timer

22435   timer

22436   secondary timer

22437   ctl handler

22438   MI FIFO

22439   WEBSOCKET KEEPALIVE

22440   tcp receiver (generic) child=0

22441   tcp receiver (generic) child=1

22442   tcp receiver (generic) child=2

22443   tcp receiver (generic) child=3

22444   tcp receiver (generic) child=4

22445   tcp receiver (generic) child=5

22446   tcp receiver (generic) child=6

22447   tcp receiver (generic) child=7

22448   tcp main process

How do i identify the issue ?