Experiencing an issue with QMalloc when Kamailio receives a lot of subscriptions (dialog-info) in a short period of time. The following is reported in logs and the TCP (TLS) connection fails: ```Apr 4 18:06:04 ua-proxy-01 /usr/local/sbin/kamailio[28456]: ERROR: <core> [tcp_main.c:959]: tcpconn_new(): mem. allocation failure Apr 4 18:06:04 ua-proxy-01 /usr/local/sbin/kamailio[28456]: ERROR: <core> [tcp_main.c:3977]: handle_new_connect(): tcpconn_new failed, closing socket``` A snapshot of SHM usage from around the time of the connection is as follows: ```shmem:fragments = 39604 shmem:free_size = 49473400 shmem:max_used_size = 67108696 shmem:real_used_size = 17635464 shmem:total_size = 67108864 shmem:used_size = 9423760``` Kamailio `-I` output is as follows: ```Print out of kamailio internals Version: kamailio 4.3.4 (x86_64/linux) b2843e Default config: /usr/local/etc/kamailio/kamailio.cfg Default paths to modules: /usr/local/lib64/kamailio/modules Compile 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, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES MAX_RECV_BUFFER_SIZE=262144 MAX_LISTEN=16 MAX_URI_SIZE=1024 BUF_SIZE=65535 DEFAULT PKG_SIZE=8MB DEFAULT SHM_SIZE=64MB ADAPTIVE_WAIT_LOOPS=1024 TCP poll methods: poll, epoll_lt, epoll_et, sigio_rt, select Source code revision ID: b2843e Compiled with: gcc 4.7.2 Compiled on: 17:56:04 Apr 4 2016 Thank you for flying kamailio!``` Once it has gotten in this state, TCP connections will no longer work, regardless of how low the SHM gets. Other connections (UDP) and subscriptions (dialog-info) work correctly at this time. There are no other OOM errors in the logs. The only thing that will resolve the issue is to restart Kamailio. Compiling to use FMalloc (`MEMMNG=0 MEMDBG=1 make cfg`) appears to resolve the issue. Kamailio `-I` output as follows: ```Print out of kamailio internals Version: kamailio 4.3.4 (x86_64/linux) b2843e Default config: /usr/local/etc/kamailio/kamailio.cfg Default paths to modules: /usr/local/lib64/kamailio/modules Compile 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, F_MALLOC, DBG_F_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES MAX_RECV_BUFFER_SIZE=262144 MAX_LISTEN=16 MAX_URI_SIZE=1024 BUF_SIZE=65535 DEFAULT PKG_SIZE=8MB DEFAULT SHM_SIZE=64MB ADAPTIVE_WAIT_LOOPS=1024 TCP poll methods: poll, epoll_lt, epoll_et, sigio_rt, select Source code revision ID: b2843e Compiled with: gcc 4.7.2 Compiled on: 18:07:19 Apr 4 2016 Thank you for flying kamailio!``` At the time the TCP connection works correctly, the SHM usage is: ```shmem:fragments = 40669 shmem:free_size = 51558136 shmem:max_used_size = 67107816 shmem:real_used_size = 15550728 shmem:total_size = 67108864 shmem:used_size = 10045520``` --- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/562