Re: [SR-Users] DMQ with dialog: KDMQ messages being looped back to the source

Another bit of data: KDMQ messages flow in the wrong direction i.e. (Node B to A) only for dialog state: 5 updates. And this happens after the actual KDMQ from A to B has already been ack'd with a 200 OK. ________________________________ From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; on behalf of Patrick Murphy &lt;patmurph7(a)outlook.com&gt; Sent: Tuesday, July 24, 2018 4:43:28 PM To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] DMQ with dialog: KDMQ messages being looped back to the source Hi Charles, Yes I exit after the handle_dmq function in the request route. I couldn't spot the looping this time (as it is intermittent), but here is the trace of messages that may indicate something weird or unexpected happening with DMQ: The following message came from Node B to A (which should never have originated because only A is receiving calls). I am assuming KDMQ will only flow from A --> B followed by their acks from B. KDMQ sip:dialog@no.de.a.ip:5060 SIP/2.0 Via: SIP/2.0/UDP xx.xx.xx.xx:5060;branch=z9hG4bK22af.6d4559b5000000.0 To: <sip:dialog@no.de.a.ip:5060> From: <sip:dialog@no.de.b.ip:5060>;tag=4d8de1338e3b915c083406d1267d5e7bg-1424 CSeq: 10 KDMQ Call-ID: 7db853960276b4a4-20185(a)no.de.a.ip Content-Length: 50 User-Agent: kamailio (5.1.1 (x86_64/linux)) Max-Forwards: 1 Content-Type: application/json {"action":3,"h_entry":3521,"h_id":23807,"state":5} And Node A correctly responded with a 500 because it was not expecting this SIP/2.0 500 Server Internal Error Via: SIP/2.0/UDP xx.xx.xx.xx:5060;branch=z9hG4bK22af.6d4559b5000000.0;received=no.de.b.ip To: <sip:dialog@no.de.a.ip:5060>;tag=7bf3c29789337c2087fcbd4083b8683d.147f From: <sip:dialog@no.de.b.ip:5060>;tag=4d8de1338e3b915c083406d1267d5e7bg-1424 CSeq: 10 KDMQ Call-ID: 7db853960276b4a4-20185(a)no.de.b.ip User-Agent: kamailio (5.1.1 (x86_64/linux)) Content-Length: 0 Regards, Owais ________________________________ From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; on behalf of Charles Chance &lt;charles.chance(a)sipcentric.com&gt; Sent: Tuesday, July 24, 2018 3:46 PM To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] DMQ with dialog: KDMQ messages being looped back to the source Hi Pat, In your config, do you exit immediately after handle_dmq_message()? Are you able to share with us one of the looped messages, both as it is received by B and then as it is sent back to A? Cheers, Charles On 24 July 2018 at 16:05, Patrick Murphy <patmurph7@outlook.com<mailto:patmurph7@outlook.com>> wrote: Hi, I am using Kamailio 5.1.1 with DMQ with the following config (relevant parts) on 2 nodes. Node A: modparam("dialog", "enable_dmq", 1) modparam("dmq", "server_address", "sip:no.de.a.ip:5060") modparam("dmq", "notification_address", "sip:myvoip.local") modparam("dmq", "multi_notify", 1) Node B: modparam("dialog", "enable_dmq", 1) modparam("dmq", "server_address", "sip:no.de.b.ip:5060") modparam("dmq", "notification_address", "sip:myvoip.local") modparam("dmq", "multi_notify", 1) "myvoip.local" is a DNS A record that resolves to both the IPs of A and B. I have the dmq_handle_message(); called if method is of type "KDMQ" in the request_route. Now, in order to test it, I only sent a few calls only on node A. KDMQ messages flowed to node B and dialog state replicated. But I noticed, node B was randomly sending one of the KDMQ dialog messages back to A and receiving a 500 "Server Internal Error" back from node A... (for a subset of those calls, not all). Why would this be the case when the nodes correctly recognize their local status by the "local: 1" set as seen from dmq.list_nodes Anyone else experienced this? What could I be doing wrong? Thanks, Pat. _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users Sipcentric Ltd. Company registered in England & Wales no. 7365592. Registered office: Faraday Wharf, Innovation Birmingham Campus, Holt Street, Birmingham Science Park, Birmingham B7 4BB.