Hello,

We are trying to achieve rtpengine HA solely with kamailio and rtpengine module.

In the following example call goes to rtpengine node 10.5.0.183:22222 and then we stop rtpengine service on this node to simulate failure.

Client is triggering re-INVITE, but, apparently, kamailio sticks to initially selected rtpengine, producing the following errors:

Jun 12 06:59:48 ap07stvp.xxxxxxx.xxx docker[9373]: 27(33) INFO: {2 2 INVITE jdl9kq6fv51jcv1agk2e} <script>: RTPENGINE branch_id:0 ruri: <null>, method:INVITE, status:200, extra_id: z9hG4bK55018600, rtpengine_answer: replace-origin replace-session-connection SIP-source-address direction=priv1 direction=pub1 SIP-source-address via-branch=extra rtcp-mux-offer generate-mid DTLS=passive SDES-off ICE=force RTP/SAVPF

Jun 12 06:59:49 ap07stvp.xxxxxxx.xxx docker[9373]: 27(33) NOTICE: {2 2 INVITE jdl9kq6fv51jcv1agk2e} acc [acc.c:287]: acc_log_request(): ACC: transaction answered: timestamp=1686553189;method=INVITE;from_tag=fcn109nfe9;to_tag=01284cc8-bc58-4104-9629-8e6bb827d97f;call_id=jdl9kq6fv51jcv1agk2e;code=200;reason=OK;src_user=90362;src_domain=10.181.0.1;src_ip=10.5.0.145;dst_ouser=123;dst_user=123;dst_domain=10.181.0.1

Jun 12 06:59:49 ap07stvp.xxxxxxx.xxx docker[9373]: 31(37) INFO: {2 2 INVITE jdl9kq6fv51jcv1agk2e} <script>: RTPENGINE branch_id:0 ruri: <null>, method:INVITE, status:200, extra_id: z9hG4bK55018600, rtpengine_answer: replace-origin replace-session-connection SIP-source-address direction=priv1 direction=pub1 SIP-source-address via-branch=extra rtcp-mux-offer generate-mid DTLS=passive SDES-off ICE=force RTP/SAVPF

Jun 12 06:59:49 ap07stvp.xxxxxxx.xxx docker[9373]: 51(57) INFO: {1 2 ACK jdl9kq6fv51jcv1agk2e} <script>: RTPENGINE branch_id:0 ruri: sip:10.5.2.192:5060, method:ACK, status:<null>, extra_id: <null>, rtpengine_offer: replace-origin replace-session-connection SIP-source-address direction=pub1 direction=priv1 SIP-source-address rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP

Jun 12 07:01:26 ap07stvp.xxxxxxx.xxx docker[9373]: 27(33) INFO: {2 3 INVITE jdl9kq6fv51jcv1agk2e} <script>: RTPENGINE branch_id:0 ruri: <null>, method:INVITE, status:200, extra_id: z9hG4bK20888040, rtpengine_answer: replace-origin replace-session-connection SIP-source-address direction=priv1 direction=pub1 SIP-source-address via-branch=extra rtcp-mux-offer generate-mid DTLS=passive SDES-off ICE=force RTP/SAVPF

Jun 12 07:01:26 ap07stvp.xxxxxxx.xxx docker[9373]: 27(33) ERROR: {2 3 INVITE jdl9kq6fv51jcv1agk2e} rtpengine [rtpengine.c:3070]: send_rtpp_command(): can't send command "offer" to RTPEngine <udp:10.5.0.183:22222>

Jun 12 07:01:26 ap07stvp.xxxxxxx.xxx docker[9373]: 54(60) INFO: {1 3 ACK jdl9kq6fv51jcv1agk2e} <script>: RTPENGINE branch_id:0 ruri: sip:10.5.2.192:5060, method:ACK, status:<null>, extra_id: <null>, rtpengine_offer: replace-origin replace-session-connection SIP-source-address direction=pub1 direction=priv1 SIP-source-address rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP

Jun 12 07:01:26 ap07stvp.xxxxxxx.xxx docker[9373]: 54(60) ERROR: {1 3 ACK jdl9kq6fv51jcv1agk2e} rtpengine [rtpengine.c:2706]: rtpp_function_call(): no available proxies

We also found Daniel answer on similar issue here:

https://github.com/kamailio/kamailio/issues/2713#issuecomment-823138302

Please advise how it can be solved.

Kind regards,

Arsenijs