[SR-Users] Kamailio Stop Processing Call

Hello Members, I have kamailio setup backed with mysql db, using db_cluster module for spliting read and write.. Lisiting on three different virtual ips are bind with same/single udp port *1* for processing calls. One static IP is bind with udp port*2* to for processing/response to option messages send from keepalived external script after every few seconds and for DMQ messages from other kamailio node. General configuation details: children=16 fork=yes listen=udp:VIP:SIP_PORT1 listen=udp:VIP2:SIP_PORT1 listen=udp:VIP3:SIP_PORT1 listen=udp:StaticIP3:SIP_PORT2 listen=tcp:SIP:RPC_PORT SH_MEM=5012 PRIV_MEM=264 System Specification : 24 GB RAM, 12 CPUs Sometimes kamailio radomly stop processing the requests or give no response on new requests recevied on virtual ips and as well it did't show any error in syslog. To monitor the kamailio memory I used promethues ( https://github.com/florentchauveau/kamailio_exporter) The moment kamailio stop processing the requests it also stop responding to kamailio exporter and scrap request get timeout. i.e error log on console debian prometheus-kamailio-exporter[83440]: 2021/05/20 12:15:27 [error] cannot read header: read unix @->/tmp/kamailio__ctl: i/o timeout After getting first timeout occurrence of kamailio-exporter scrap request, kamailio processed sip messages for almost 30 seconds then completly stop replying to any message. But it keep replying to option message arrive on different port from keepalived script. Stats : Active dialog: 75 Shared memory used: 150 MB Kamailio Installed version : kamailio -v 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 compiled on 12:51:24 Sep 21 2020 with gcc 6.3.0 Is anyone else face similar issue or idea why kamailio is showing such behaviour.? Please guide me on what I should do to find and fix the issue. Thanks -- Regards M Arqum