Dear All, 
Thanks in advance for your help. 

kamailio installed on debain 9, sometime kamailio failed to generate any log in syslog files i.e messages/ syslog , not even generate a single line against complete dialog  or generate partial logs. 
It's a random behaviour, as i am using syslog with the acc module, kamailio also failed to write acc logs on file which is a very critical matter for me. 

In a script using xinfo, xnotice, xerr function, no output from these functions in log file.

Please suggest a way to fix this issue. 

modparam("xlog", "log_facility", "LOG_LOCAL1")

version: kamailio 5.5.4 (x86_64/linux) 9d039b
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_BLOCKLIST, 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: 9d039b 


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Regards
M Arqum