Hello Daniel, Out put of the command kamailio -v is as below, version: kamailio 5.0.0-dev5 (x86_64/linux) 750f98-dirty flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, TIMER_DEBUG, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 12MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 750f98 -dirty compiled on 18:21:17 Jul 4 2017 with gcc 4.8.4 I have attached my kamailio.cfg file along with this mail please check and help me to resolve this issue Thanks & Regards Hemanth -----Original Message----- From: "Daniel-Constantin Mierla" Sent: Wednesday, 5 July, 2017 2:10pm To: "Kamailio (SER) - Users Mailing List" , "hemanth(a)advaitamtech.com" Subject: Re: [SR-Users] Kamailio Crashing inconsistently Hello, what is the exact version you run (kamailio -v)? Do you have any custom/private module used in the config? Cheers, Daniel On 05.07.17 09:04, hemanth(a)advaitamtech.com wrote: Hello, I am using Kamailio 4.4, Kamailio is crashing inconsistently, I am not able find the root cause of the issue, Error which i get for the process which crashed at multiple occations kamailio[9137]: : [mem/q_malloc.c:145]: qm_debug_frag(): BUG: qm_*: prev. fragm. tail overwritten(6363e160b12, abcdefed)[0x7f205db59070:0x7f205db590a8]! Memory allocator was called from tm: h_table.c:152. Fragment marked by tm: t_reply.c:1903. kamailio[21724]: : [mem/q_malloc.c:134]: qm_debug_frag(): BUG: qm_*: fragm. 0x7f1fe804a1e8 (address 0x7f1fe804a220) end overwritten (4ae8cfaec87c0a27, 192f1270797ac90b)! Memory allocator was called from tm: h_table.c:179. Fragment marked by core: msg_translator.c:2153. kamailio[21950]: : [mem/q_malloc.c:134]: qm_debug_frag(): BUG: qm_*: fragm. 0x7fe541a2cd68 (address 0x7fe541a2cda0) end overwritten (c0082c06, abcdefed)! Memory allocator was called from tm: h_table.c:179. Fragment marked by core: msg_translator.c:2153. kamailio[23200]: : [mem/q_malloc.c:134]: qm_debug_frag(): BUG: qm_*: fragm. 0x7f1fae7fa260 (address 0x7f1fae7fa298) end overwritten (3a46e86e1b362938, 7260f1875617e)! Memory allocator was called from tm: h_table.c:179. Fragment marked by core: msg_translator.c:2153. There are 2 cores generated whenever it crashes, I have given the backtrace of the core generated, (gdb) bt #0 0x00007fe16aca4c37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007fe16aca8028 in __GI_abort () at abort.c:89 #2 0x000000000066b4ac in qm_debug_frag (qm=0x7fe160bc2000, f=0x7fe160ec9108, file=0x7fe1684dc84e "tm: h_table.c", line=179) at mem/q_malloc.c:147 #3 0x000000000066e255 in qm_free (qmp=0x7fe160bc2000, p=0x7fe160ec9140, file=0x7fe1684dc84e "tm: h_table.c", func=0x7fe1684dcb00 "free_cell_helper", line=179, mname=0x7fe1684dc250 "tm") at mem/q_malloc.c:480 #4 0x00007fe16840cab9 in free_cell_helper (dead_cell=0x7fe160f09e50, silent=0, fname=0x7fe1684eeb8c "timer.c", fline=648) at h_table.c:179 #5 0x00007fe1684584a7 in wait_handler (ti=1156027084, wait_tl=0x7fe160f09ed0, data=0x7fe160f09e50) at timer.c:648 #6 0x000000000063a329 in timer_list_expire (t=1156027084, h=0x7fe160c3faf0, slow_l=0x7fe160c42da8, slow_mark=776) at timer.c:874 #7 0x000000000063a79d in timer_handler () at timer.c:939 #8 0x000000000063ac3d in timer_main () at timer.c:978 #9 0x00000000004c2550 in main_loop () at main.c:1683 #10 0x00000000004c9211 in main (argc=13, argv=0x7ffe6bf7da98) at main.c:2627 (gdb) bt #0 0x00007fe16aca4c37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007fe16aca8028 in __GI_abort () at abort.c:89 #2 0x000000000066b02c in qm_debug_frag (qm=0x7fe160bc2000, f=0x7fe160ec8de0, file=0x7fe1684dc84e "tm: h_table.c", line=179) at mem/q_malloc.c:136 #3 0x000000000066e255 in qm_free (qmp=0x7fe160bc2000, p=0x7fe160ec8e18, file=0x7fe1684dc84e "tm: h_table.c", func=0x7fe1684dcb00 "free_cell_helper", line=179, mname=0x7fe1684dc250 "tm") at mem/q_malloc.c:480 #4 0x00007fe16840cab9 in free_cell_helper (dead_cell=0x7fe160ed6a28, silent=1, fname=0x7fe1684dc9c1 "h_table.c", fline=449) at h_table.c:179 #5 0x00007fe16840e491 in free_hash_table () at h_table.c:449 #6 0x00007fe168436141 in tm_shutdown () at t_funcs.c:90 #7 0x00000000005c0a50 in destroy_modules () at sr_module.c:811 #8 0x00000000004b6449 in cleanup (show_status=1) at main.c:525 #9 0x00000000004b7ad6 in shutdown_children (sig=15, show_status=1) at main.c:667 #10 0x00000000004ba428 in handle_sigs () at main.c:759 #11 0x00000000004c343e in main_loop () at main.c:1744 #12 0x00000000004c9211 in main (argc=13, argv=0x7ffe6bf7da98) at main.c:2627 Thanks & Regards Hemanth _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - www.asipto.com Kamailio World Conference - www.kamailioworld.com