Hi Carsten, Thanks for your quick reply. The "500" is generated by the Kamailio server which is used as Load balancer ( using dispatcher module). I dont see any 500 number in my kamailio.cfg in the load balancer kamailio. Should I go deep into the dispatcher module itself? Unluckily I cannot check the reason by checking the syslog since this only happen when thousands of request come in at the same time. chanea On Tue, Feb 26, 2013 at 7:24 PM, Carsten Bock <carsten(a)ng-voice.com> wrote: _______________________________________________ sr-dev mailing list sr-dev(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev

Hi Carsten, Thanks again for your kind reply. I am quite newbie to kamailio, and I dont see why the load balancer is replying "500". It will be great appreciated if you can point out what i am doing wrong in my config file as below. Actually, there is another issue for the setting below is that it cannot load balancing the "REGISTER" correctly. best regards, chanea ============================================================== ####### Global Parameters ######### #!define WITH_NAT # - flags # FLT_ - per transaction (message) flags # FLB_ - per branch flags #!define FLT_ACC 1 #!define FLT_ACCMISSED 2 #!define FLT_ACCFAILED 3 #!define FLT_NATS 5 #!define FLB_NATB 6 #!define FLB_NATSIPPING 7 ####### Global Parameters ######### debug=-3 log_stderror=no memdbg=5 memlog=5 log_facility=LOG_LOCAL0 fork=yes children=8 disable_tcp=yes auto_aliases=no port=5060 sip_warning=no ####### Modules Section ######## # set paths to location of modules #!ifdef LOCAL_TEST_RUN mpath="modules_k:modules" #!else mpath="/usr/local/lib64/kamailio/modules_k/:/usr/local/lib64/kamailio/modules/" #!endif loadmodule "db_mysql.so" loadmodule "mi_fifo.so" loadmodule "kex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "usrloc.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "textops.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "mi_rpc.so" loadmodule "acc.so" loadmodule "dispatcher.so" #!ifdef WITH_NAT loadmodule "nathelper.so" loadmodule "rtpproxy.so" #!endif # ----- mi_fifo params ----- modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo") # ----- rr params ----- # add value to ;lr param to cope with most of the UAs modparam("rr", "enable_full_lr", 1) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) # ----- acc params ----- modparam("acc", "log_flag", 1) modparam("acc", "failed_transaction_flag", 3) modparam("acc", "log_extra", "src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si") # ----- tm params ----- modparam("tm", "fr_timer", 10000) modparam("tm", "fr_inv_timer", 40000) #!ifdef WITH_NAT # ----- rtpproxy params ----- #modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722") modparam("rtpproxy", "rtpproxy_sock", "udp:{myipaddr}:22222") # ----- nathelper params ----- modparam("nathelper", "natping_interval", 600) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) modparam("nathelper", "sipping_from", "sip:pinger@{myipaddr}") # params needed for NAT traversal in other modules modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)") modparam("usrloc", "nat_bflag", FLB_NATB) #!endif # ----- dispatcher params ----- modparam("dispatcher", "db_url", "mysql://{mydbsetting}") modparam("dispatcher", "table_name", "dispatcher") modparam("dispatcher", "flags", 2) modparam("dispatcher", "dst_avp", "$avp(AVP_DST)") modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)") modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)") ####### Routing Logic ######## # main request routing logic route { # per request initial checks route(REQINIT); # NAT detection route(NAT); # handle requests within SIP dialogs route(WITHINDLG); ### only initial requests (no To tag) # CANCEL processing if (is_method("CANCEL")) { if (t_check_trans()) t_relay(); exit; } t_check_trans(); # record routing for dialog forming requests (in case they are routed) # - remove preloaded route headers remove_hf("Route"); if (is_method("INVITE|SUBSCRIBE")) record_route(); # account only INVITEs if (is_method("INVITE")) { setflag(1); # do accounting } # dispatch destinations route(DISPATCH); route(RELAY); } route[RELAY] { #!ifdef WITH_NAT if (check_route_param("nat=yes")) { setbflag(FLB_NATB); } if (isflagset(FLT_NATS) || isbflagset(FLB_NATB)) { route(RTPPROXY); } #!endif if (!t_relay()) { sl_reply_error(); } exit; } # Per SIP request initial checks route[REQINIT] { if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); exit; } if(!sanity_check("1511", "7")) { xlog("Malformed SIP message from $si:$sp\n"); exit; } } # Caller NAT detection route route[NAT] { #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19")) { #xlog("L_INFO","ALERT: ua is behind NAT (ru:$ru)(IP:$si:$sp)\n"); if (method=="REGISTER") { fix_nated_register(); } else { fix_nated_contact(); } setflag(FLT_NATS); } #!endif return; } # RTPProxy control route[RTPPROXY] { #!ifdef WITH_NAT if (is_method("BYE")) { unforce_rtp_proxy(); } else if (is_method("INVITE")){ force_rtp_proxy(); } if (!has_totag()) add_rr_param(";nat=yes"); #!endif return; } # Handle requests within SIP dialogs route[WITHINDLG] { if (has_totag()) { # sequential request withing a dialog should # take the path determined by record-routing if (loose_route()) { if (is_method("BYE")) { setflag(1); # do accounting ... setflag(3); # ... even if the transaction fails } route(RELAY); } else { if ( is_method("ACK") ) { if ( t_check_trans() ) { # non loose-route, but stateful ACK; # must be ACK after a 487 or e.g. 404 from upstream server t_relay(); exit; } else { # ACK without matching transaction ... ignore and discard. exit; } } sl_send_reply("404","Not here"); } exit; } } # Dispatch requests route[DISPATCH] { # round robin dispatching on gateways group '1' if(!ds_select_dst("1", "0")) { send_reply("404", "No destination"); exit; } xlog("L_INFO", "--- SCRIPT: going to <$ru> via <$du>\n"); t_on_failure("RTF_DISPATCH"); return; } # Sample failure route failure_route[RTF_DISPATCH] { if (t_is_canceled()) { exit; } # next DST - only for 500 or local timeout if (t_check_status("500") or (t_branch_timeout() and !t_branch_replied())) { if(ds_next_dst()) { t_on_failure("RTF_DISPATCH"); route(RELAY); exit; } } } ================================================================= On Tue, Feb 26, 2013 at 8:32 PM, Carsten Bock &lt;carsten(a)ng-voice.com&gt; wrote: _______________________________________________ sr-dev mailing list sr-dev(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev

Hi Carsten, Thanks for reply. No idea how this happen but after increase the shared memory used to run Kamailio , this 500 issue is gone now. BTW, REGISTER being routed seems wrong in my config file , therefore after load balancing , client cannot reach each other by MESSAGE. Client --- > Kamailio LB --->Sip01 \ ---->Sip02 Any idea??

Best Regards, chanea On Tue, Feb 26, 2013 at 10:39 PM, Carsten Bock &lt;carsten(a)ng-voice.com <mailto:carsten@ng-voice.com>> wrote: Hi, i see no point in your config, where the 500 should come from. It must come from the servers you are loadbalancing for. Kind regards, Carsten 2013/2/26 chanea &lt;chanea(a)gmail.com <mailto:chanea@gmail.com>>: balancer is doing wrong in it cannot mpath="/usr/local/lib64/kamailio/modules_k/:/usr/local/lib64/kamailio/modules/" "src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si") <http://127.0.0.1:7722>") routed) &lt;carsten(a)ng-voice.com <mailto:carsten@ng-voice.com>> wrote: Error" replies. as Load since this &lt;carsten(a)ng-voice.com <mailto:carsten@ng-voice.com>> internal or by some (if at all) same time , request. response? <mailto:sr-dev@lists.sip-router.org> See See -- Carsten Bock CEO (Geschäftsführer) ============================================================= Visit us on the Kamailio World 2013, 16./17. April 2013 => http://conference.kamailio.com/k01/ See you there! ============================================================= ng-voice GmbH Schomburgstr. 80 D-22767 Hamburg / Germany http://www.ng-voice.com mailto:carsten@ng-voice.com <mailto:carsten@ng-voice.com> Office +49 40 34927219 <tel:%2B49%2040%2034927219> Fax +49 40 34927220 <tel:%2B49%2040%2034927220> Sitz der Gesellschaft: Hamburg Registergericht: Amtsgericht Hamburg, HRB 120189 Geschäftsführer: Carsten Bock Ust-ID: DE279344284 Hier finden Sie unsere handelsrechtlichen Pflichtangaben: http://www.ng-voice.com/imprint/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ sr-dev mailing list sr-dev(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev