### Description While a INVITE is been processed the CANCEL of that transaction is been processed in other process almost at the same time ### Troubleshooting #### Reproduction Quite difficult to reproduce I would say #### Debugging Data ``` Reading symbols from /usr/sbin/kamailio... Reading symbols from /usr/lib/debug/.build-id/e3/9bd8ad0900c980149b00579cce26035c9cb118.debug... warning: Can't open file /dev/zero (deleted) during file-backed mapping note processing [New LWP 4136750] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/usr/sbin/kamailio -P /run/kamailio/kamailio.proxy.pid -f /etc/kamailio/proxy/k'. Program terminated with signal SIGSEGV, Segmentation fault. #0 atomic_dec_and_test_int (var=0x20) at ../../core/parser/../mem/../atomic/atomic_x86.h:222 222 ../../core/parser/../mem/../atomic/atomic_x86.h: No such file or directory. (gdb) backtrace #0 atomic_dec_and_test_int (var=0x20) at ../../core/parser/../mem/../atomic/atomic_x86.h:222 0000001 t_unref (p_msg=<optimized out>) at t_lookup.c:1514 #2 0x000055eee962d69b in exec_post_script_cb (msg=msg@entry=0x7f7e265822c8, type=type@entry=REQUEST_CB_TYPE) at core/script_cb.c:182 0000003 0x000055eee95dfcbe in receive_msg ( buf=buf@entry=0x55eee9a00740 <buf> "INVITE sip:...@fake.dom:5060;transport=udp SIP/2.0\r\nRecord- Route: <sip:X.X.X.X;r2=on;lr=on;ftag=1E7F0816-6299BCF10003883E-7FFFF700;ngcplb=yes;socket=udp:Y.Y.Y.Y:5060>\r \nRe"..., len=<optimized out>, rcv_info=rcv_info@entry=0x7ffc96d12af0) at core/receive.c:520 #4 0x000055eee96d4c40 in udp_rcv_loop () at core/udp_server.c:543 #5 0x000055eee94db634 in main_loop () at main.c:1730 #6 0x000055eee94d2d2c in main (argc=<optimized out>, argv=<optimized out>) at main.c:3053 ``` #### Log Messages Notice that both messages came in the same second ( IPs and numbers have been changed ) ``` Jun 3 09:49:05 sipwise2-prx03a proxy[4136750]: NOTICE: DEFAULT_ROUTE <script>: New request on proxy - M=INVITE R=«sip:+49......@X.X.X.X :5060;transport=udp» F=«sip:+49...@fake.dom» T=«sip:+49...@Y.Y.Y.Z» IP=«Y.Y.Y.Z»:«5060» («Y.Y.Y.Y»:«5060») ID=«31668-TN-030322e6-0904f8ba1(a)fake.xn--dom_b2b-1-era UA='Cirpack/v4.88 (gw_sip)' DESTIP=«Y.Y.Y.G»:«5062» ``` ``` Jun 3 09:49:05 sipwise2-prx03a proxy[4136755]: NOTICE: DEFAULT_ROUTE <script>: New request on proxy - M=CANCEL R=«sip:+49...@X.X.X.X :5060;transport=udp» F=«sip:+49...@fake.dom» T=«sip:+49...@Y.Y.Y.Z» IP=«Y.Y.Y.Y»:«5060» («Y.Y.Y.Y»:«5060 ») ID=«31668-TN-030322e6-0904f8ba1(a)fake.xn--dom_b2b-1-era UA='<null>' DESTIP=«Z.Z.Z.Z»:«5062» Jun 3 09:49:05 sipwise2-prx03a proxy[4136755]: NOTICE: DEFAULT_ROUTE <script>: Sending reply S=100 Trying M=CANCEL fs='«Z.Z.Z.Z»:«5062»' du ='«Y.Y.Y.Y»:«5060»' - R=«sip:+49...@X.X.X.X:5060;transport=udp» ID=«31668-TN-030322e6-0904f8ba1(a)fake.xn--dom_b2b-1-era UA='<n ull>' ``` ### Additional Information This is the Sipwise flavor 5.5.1-1+0~mr9.5.3.2 -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3156 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3156(a)github.com&gt;