I recently installed kamailio and it was enabled & started--> Service is active & running

But once I added users I see kamailio service is failed

[root@rlab111053 kamailio]# systemctl status kamailio ● kamailio.service - Kamailio (OpenSER) - the Open Source SIP Server Loaded: loaded (/etc/systemd/system/kamailio.service; enabled; vendor preset: disabled) Active: failed (Result: start-limit) since Wed 2020-04-29 18:47:26 IST; 860ms ago Process: 16759 ExecStart=/usr/sbin/kamailio -DD -P /var/run/kamailio/kamailio.pid -f $CFGFILE -m $SHM_MEMORY -M $PKG_MEMORY (code=exited, status=255) Main PID: 16759 (code=exited, status=255)

Apr 29 18:47:25 rlab111053 systemd[1]: kamailio.service: main process exited, code=exited, status=255/n/a Apr 29 18:47:25 rlab111053 systemd[1]: Unit kamailio.service entered failed state. Apr 29 18:47:25 rlab111053 systemd[1]: kamailio.service failed. Apr 29 18:47:26 rlab111053 systemd[1]: kamailio.service holdoff time over, scheduling restart. Apr 29 18:47:26 rlab111053 systemd[1]: Stopped Kamailio (OpenSER) - the Open Source SIP Server. Apr 29 18:47:26 rlab111053 systemd[1]: start request repeated too quickly for kamailio.service Apr 29 18:47:26 rlab111053 systemd[1]: Failed to start Kamailio (OpenSER) - the Open Source SIP Server. Apr 29 18:47:26 rlab111053 systemd[1]: Unit kamailio.service entered failed state. Apr 29 18:47:26 rlab111053 systemd[1]: kamailio.service failed.

**I am using below version**

[root@rlab111053 kamailio]# kamailio -version version: kamailio 5.1.10 (x86_64/linux) cfcfd5 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, 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_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: cfcfd5 compiled on 15:40:49 Mar 6 2020 with gcc 4.8.5 [root@rlab111053 kamailio]#

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