[SR-Users] Unable to start Kamailio with acc_json

[Joonas Kamailio]

Dear List,

I have a problem with initializing acc_json. As soon as I try to load 
acc_json module, Kamailio fails to start. I get the following messages 
to log with debug 4 (non-related messages omitted):

Jan  7 16:17:42 labkam2 kamailio[51089]: INFO: acc_json 
[acc_json_mod.c:99]: mod_init(): janson version : 2.9
Jan  7 16:17:43 labkam2 kamailio: ERROR: <core> [core/daemonize.c:303]: 
daemonize(): Main process exited before writing to pipe

Running 'bt full' on coredump tells following:

(gdb) bt full
#0  strlen () at ../sysdeps/x86_64/strlen.S:106
No locals.
#1  0x00007f086d0a69fd in mod_init () at acc_json_mod.c:120
         __func__ = "mod_init"
#2  0x000055f1699cc6a2 in init_mod (m=0x7f087c0983d0) at 
core/sr_module.c:897
         __func__ = "init_mod"
#3  0x000055f1699cca16 in init_modules () at core/sr_module.c:926
         t = 0x29ceb62d
         i = -1
         __func__ = "init_modules"
#4  0x000055f16989445a in main (argc=3, argv=0x7ffc56d94378) at main.c:2617
         cfg_stream = 0x55f16beb0010
         c = -1
         r = 0
         tmp = 0x7f087c9512e7 "__vdso_getcpu"
         tmp_len = 32764
         port = 1457078704
         proto = 32520
         options = 0x55f169c019f0 
":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
         ret = -1
         seed = 2201341167
         rfd = 4
         debug_save = 0
         debug_flag = 0
         dont_fork_cnt = 0
         n_lst = 0x0
         p = 0xf0b0ff <error: Cannot access memory at address 0xf0b0ff>
         st = {st_dev = 19, st_ino = 306346, st_nlink = 2, st_mode = 
16832, st_uid = 0, st_gid = 0, __pad0 = 0, st_rdev = 0, st_size = 80, 
st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1543318847, 
tv_nsec = 544329773}, st_mtim = {tv_sec = 1546870639,
             tv_nsec = 902332400}, st_ctim = {tv_sec = 1546870639, 
tv_nsec = 902332400}, __glibc_reserved = {0, 0, 0}}
         __func__ = "main"

I have loaded "acc" module before loading "acc_json", are there any 
other mandatory prerequisites? I am trying to use acc_json to output 
accounting data to syslog. I just recompiled latest 5.2 kamailio but 
problem still occurs. Kamailio version below:

root at labkam2:/opt/git/kamailio# kamailio -v
version: kamailio 5.2.0 (x86_64/linux) c5216b
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: c5216b
compiled on 16:13:00 Jan  7 2019 with gcc 6.3.0

Best Regards,
Joonas Keskitalo