[SR-Users] Kamailio suddenly stopes responding to sip messages

[Uttam Giri]

Hi,
We are using Kamailio with Jitsi client where we observed sometimes
Kamailio stops responding to sip messages. As a result, my Jitsi client
goes offline and never back online. Also in the Kamailio syslog there are
no error logs(debug enabled) related to this issue. As a temporary
workaround, we had to restart the Kamailio server all the time.
Does anyone observed a similar issue and can suggest any resolution.

Kamailio version:-
version: kamailio 5.3.5 (x86_64/linux)
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: unknown
compiled with gcc 7.5.0

UDP process when Kamailio stops responding:-.

root at ip-10-68-16-14:/home/ugiri# kamctl ps
{
  "jsonrpc":  "2.0",
  "result": [
    {
      "IDX":  0,
      "PID":  15436,
      "DSC":  "main process - attendant"
    }, {
      "IDX":  1,
      "PID":  15442,
      "DSC":  "udp receiver child=0 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  2,
      "PID":  15443,
      "DSC":  "udp receiver child=1 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  3,
      "PID":  15444,
      "DSC":  "udp receiver child=2 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  4,
      "PID":  15445,
      "DSC":  "udp receiver child=3 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  5,
      "PID":  15446,
      "DSC":  "udp receiver child=4 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  6,
      "PID":  15447,
      "DSC":  "udp receiver child=5 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  7,
      "PID":  15448,
      "DSC":  "udp receiver child=6 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  8,
      "PID":  15449,
      "DSC":  "udp receiver child=7 sock=10.68.16.14:5060 (100.26.5.214:5060
)"
    }, {
      "IDX":  9,
      "PID":  15450,
      "DSC":  "slow timer"
    }, {
      "IDX":  10,
      "PID":  15451,
      "DSC":  "timer"
    }, {
      "IDX":  11,
      "PID":  15452,
      "DSC":  "secondary timer"
 }, {
      "IDX":  12,
      "PID":  15453,
      "DSC":  "JSONRPCS FIFO"
    }, {
      "IDX":  13,
      "PID":  15454,
      "DSC":  "JSONRPCS DATAGRAM"
    }, {
      "IDX":  14,
      "PID":  15455,
      "DSC":  "ctl handler"
    }, {
      "IDX":  15,
      "PID":  15456,
      "DSC":  "Http Async Worker"
    }, {
      "IDX":  16,
      "PID":  15457,
      "DSC":  "Http Async Worker"
    }, {
      "IDX":  17,
      "PID":  15458,
      "DSC":  "TIMER NH"
    }, {
      "IDX":  18,
      "PID":  15459,
      "DSC":  "tcp main process"
    }
  ],
  "id": 17709
}

Thanks,
Uttam
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