[sr-dev] Fwd: crash & 100% CPU usage problem with kamailio 3.1.2

[Zunnun]

Hi Andrei,



Sorry I forgot to answer all your questions in my last email.



This is the version of kamailio (we are running it on CentOS 5.5, 64 bit
with 8 Cores Xenon processor, 8 GB RAM), & we are starting kamailio with 2
GB shared memory.

version: kamailio 3.1.2 (x86_64/linux)

flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS,
DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC,
DBG_QM_MALLOC, 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_LISTEN 16,
MAX_URI_SIZE 1024, BUF_SIZE 65535, PKG_SIZE 4MB

poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.

id: unknown

compiled on 10:32:48 Mar  7 2011 with gcc 4.1.2



We are using kamailio as a router for SIP messages. We connect kamailio with
OCS Access proxy & sends traffic.



We have two Access proxies, each creates up to 32 TCP /TLS connections. And
sends over 5000 messages/sec. So there is not enough connected socketa for
kamailio but we frequently close the sockets for testing.



We are running kamailio with 8 TCP children. & when it crashes it generates
mostly 2 core files.



There is defiantly a race condition inside the code which I have fixed it
but it was not related to the tcp connection management.  I will send you
the code soon or submit it to the dev group. It is inside timer code.



For this 100% cpu problem, the linked list is circular. May be the code that
adds/removes TCP connection to linked list is not perfect.



Regards

-Zunnun
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