<p>Considering such route for async queries </p>
<p><code>route[REQUESTRTJSON] {</code><br>
<code>xlogl("L_INFO", "Requesting JSON routes\n");</code><br>
<code>t_newtran();</code><br>
<code>$http_req(hdr) = "Expect:";</code><br>
<code>$http_req(timeout) = DEFAULTHTTPTIMEOUTMSEC;</code><br>
<code>http_async_query("http://127.0.0.1/webrtcwslb/forwarder.php?forwardservice=kamailiort&rU=$(rU{s.encode.hexa})&fU=$(fU{s.encode.hexa})&dd=$(dd{s.encode.hexa})&du=$(du{s.encode.hexa})&rd=$(rd{s.encode.hexa})&fn=$(fn{s.encode.hexa})&fd=$(fd{s.encode.hexa})&td=$(td{s.encode.hexa})&tn=$(tn{s.encode.hexa})&tU=$(tU{s.encode.hexa})&ci=$(ci{s.encode.hexa})&ct=$(ct{s.encode.hexa})&si=$(si{s.encode.hexa})&mb=$(mb{s.encode.hexa})&dP=$(dP{s.encode.hexa})","HTTPRTJSONREPLY");</code><br>
<code>}</code></p>
<p>And answer processed in</p>
<p><code>route[HTTPRTJSONREPLY] {</code><br>
<code>if($http_ok) {</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: status $http_rs\n");</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: body $http_rb\n");</code><br>
<code>json_get_field($http_rb,"routing", "$var(routing)");</code><br>
<code>if($var(routing)=="location") {</code><br>
<code>route(LOCATION);</code><br>
<code>exit;</code><br>
<code>}</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: init routes\n");</code><br>
<code>rtjson_init_routes("$http_rb");</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: pushing routes\n");</code><br>
<code>rtjson_push_routes();</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: pushed routes\n");</code><br>
<code>t_on_branch("MANAGE_BRANCH");</code><br>
<code>t_on_failure("MANAGE_FAILURE");</code><br>
<code>route(RELAY);</code><br>
<code>exit;</code><br>
<code>} else {</code><br>
<code>xlogl("L_INFO", "route[HTTPRTJSONREPLY]: error $http_err\n");</code><br>
<code>exit;</code><br>
<code>}</code><br>
<code>}</code></p>
<p>the cfgtrace gives</p>
<blockquote>
<p>2016-11-16T09:29:36.869221+01:00 localhost (12040) ERROR: *** cfgtrace:request_route=[REQUESTRTJSON] c=[/product/CCAPI/WebRTC/Kamailio/etc/1479284325.480324_f0b20d2e1c37d2fa3dfed1126a48aacaf79c2ab6//kamailio.cfg] l=581 a=26 n=http_async_query<br>
...<br>
2016-11-16T09:29:36.912117+01:00 localhost (12035) ERROR: *** cfgtrace:failure_route=[HTTPRTJSONREPLY] c=[/product/CCAPI/WebRTC/Kamailio/etc/1479284325.480324_f0b20d2e1c37d2fa3dfed1126a48aacaf79c2ab6//kamailio.cfg] l=607 a=16 n=if</p>
</blockquote>
<p>so HTTPRTJSONREPLY route is considered as failure_route, such state is kept when calling route(RELAY) and further raising the following code in rtpengine on INVITE for rtpengine_manage() function <br>
<code>if (msg->first_line.type == SIP_REQUEST) {</code><br>
<code>...</code><br>
<code>if(method==METHOD_INVITE && nosdp==0) {</code><br>
<code>msg->msg_flags |= FL_SDP_BODY;</code><br>
<code>if(tmb.t_gett!=NULL && tmb.t_gett()!=NULL</code><br>
<code>&& tmb.t_gett()!=T_UNDEFINED)</code><br>
<code>tmb.t_gett()->uas.request->msg_flags |= FL_SDP_BODY;</code><br>
<code>if(route_type==FAILURE_ROUTE)</code><br>
<code>return rtpengine_delete(msg, flags);</code><br>
<code>return rtpengine_offer_answer(msg, flags, OP_OFFER, 0);</code><br>
<code>}</code></p>
<p>On kamailio 4.4.1 rtpengine_offer_answer() was called, but now rtpengine_delete() is called due to (route_type==FAILURE_ROUTE)</p>
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