Hey guys,

    Here is the response from backtrace:

Core was generated by `/sbin/kamailio -P /var/run/kamailio.pid -m 4096'.
Program terminated with signal 11, Segmentation fault.
[New process 29118]
#0 0x00007f37499be44d in relay_reply (t=0x7f3645019f88, p_msg=0x857350, branch=0, msg_status=487, cancel_bitmap=0x7fff53aa3428) at t_reply.c:1101
1101                            relayed_code=relayed_msg->REPLY_STATUS;
(gdb) bt
#0 0x00007f37499be44d in relay_reply (t=0x7f3645019f88, p_msg=0x857350, branch=0, msg_status=487, cancel_bitmap=0x7fff53aa3428) at t_reply.c:1101
#1 0x00007f37499bf8fb in reply_received (p_msg=0x857350) at t_reply.c:1404
#2 0x00000000004218fc in forward_reply (msg=0x857350) at forward.c:507
#3 0x000000000045cf35 in receive_msg (
    buf=0x744aa0 "SIP/2.0 487 Request Terminated\r\nTo: <sip:+1XXXXXXXXXX@PSTN:5060>;tag=63c9393246a9a5d6i0\r\nFrom: \"XXXXX X & X    \" <sip:XXXXXXXXXX@PSTN>;tag=VPSF506071629460\r\nCall-ID: STMMGC012009071521"..., len=997, rcv_info=0x7fff53aa3520) at receive.c:203
#4 0x000000000049c486 in udp_rcv_loop () at udp_server.c:449
#5 0x000000000042882b in main (argc=<value optimized out>, argv=<value optimized out>) at main.c:780

As far as syslog/kernel message:
Jul 15 21:07:28 sip-XXXX kernel: [526828.616918] kamailio[29118]: segfault at 40 ip 7f37499be44d sp 7fff53aa32b0 error 4 in tm.so[7f374997f000+4d000]

The server load seems to randomly jump to ~ 8 - 10 and this happens, any thoughts / help is appreciated, thanks!

One other thing that may be relevant, is we have disabled TCP support on this proxy, because previously (I have another mailing list thread) about, with TCP enabled kamailio will not start due to epoll alloc failure, thanks!