Hello, have also a look to the log messages if you get some hints why it stops processing. The backtrace indicates some DMQ processing, I’d suggest that you update to the latest 5.4.x or (better) 5.5.x release. There might be bugfixes that helps to mitigate the issues you are facing. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com *From:* sr-users <sr-users-bounces(a)lists.kamailio.org> *On Behalf Of *M Arqum CH *Sent:* Wednesday, May 18, 2022 1:44 PM *To:* Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> *Subject:* [SR-Users] Kamailio Stop Responding Randomly Kamailio first gives timeout on ctl unix socket as I am exporting data using prometheus exporter, after a few minutes it stops responding to any sip request on default/production udp port binded with multiple IP addresses for sip traffic. The other listing port which is used by keepalived check script for bing-pong keeps responding to option messages. Its very random behaviour occurs after a few days or after a few months, the system having max load 350 concurrent calls with load average 200-300. links of core dump files are shared below which are collected before restarting the process. https://drive.google.com/file/d/1tAQ0ifiMLHwc-iznBADYzXTuhI1wIgIf/view?usp=… https://drive.google.com/file/d/1MIqNqc4j94lGWz6xDbV0UeRX1DNivhT2/view?usp=… https://drive.google.com/file/d/1txvak79JYog6qsh43rYiQ27YodWjR2vf/view?usp=… Please let me know if more information is required. version: kamailio 5.4.1 (x86_64/linux) 2ca223 flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 2ca223 Thankyou in advance. -- Regards M Arqum