[SR-Users] Dispatcher stops working

[Arsen Semenov]

Hi Sergio,

Make sure your dispatcher probing parameters are set correctly. (reply
codes as well).

And if it happens again you can catch OPTIONS traffic with sngrep  "CSeq:
[0-9]+ OPTIONS"
and see what happens on this level.
Whether Kamailio does send pings, whether replies from gw are the same as
expected, etc.


Regards,

On Wed, Sep 16, 2020 at 5:55 PM David Villasmil <
david.villasmil.work at gmail.com> wrote:

> Hello
>
> I would start by looking at the logs when that happens. The gateway would
> only get marked "ip" when there is no reply by the gateway or when it
> replies with 500. Also OPTIONs not being replied promptly.
> Maybe add some logging right before ds_mark_dst("ip").
>
> Hope that helps,
>
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com
> phone: +34669448337
>
>
> On Wed, Sep 16, 2020 at 11:40 AM Sergio Charrua <sergio.charrua at voip.pt>
> wrote:
>
>> Hello,
>>
>> Using Kamailio 5.1.6 for load balancing & failover,
>> I noticed that from time to time, and very rarely, the dispatcher module
>> stops dispatching to the Asterisk servers.
>> I have to execute a "kamcmd dispatcher reload" for it to (re)start
>> working.
>>
>> This is my dispatcher.list :
>> 1 sip:10.19.XXX.YYY:5060 0 1 duid=sipgw01;maxload=100
>> 1 sip:10.19.XXX.YYY:5060 0 2 duid=sipgw02;maxload=100
>> 1 sip:10.19.XXX.YYY:5060 0 3 duid=sipgw03;maxload=100
>> 1 sip:10.19.XXX.YYY:5060 0 4 duid=sipgw04;maxload=100
>>
>> This is my dispatch routes:
>> # Dispatch requests
>> route[DISPATCH] {
>>
>>         if(!ds_select_dst("1", "10","4"))
>>         {
>>                 xlog("L_INFO","no destination selected from dispatcher
>> list!");
>>                 send_reply("404", "No destination");
>>                 exit;
>>         }
>>
>>         xlog("L_INFO","going to <$ru> via <$du>\n");
>>
>>         t_on_failure("RTF_DISPATCH");
>>         route(RELAY);
>>
>>         exit;
>>
>> }
>>
>> # Sample failure route
>> failure_route[RTF_DISPATCH] {
>>         if (t_is_canceled()) {
>>                 exit;
>>         }
>>         xlog("L_INFO", "Media server $du failed to answer, selecting
>> other one!");
>>         # next DST - only for 500 or local timeout
>>         if ( t_check_status("500") || (t_branch_timeout() &&
>> !t_branch_replied()) )
>>         {
>>                 #mark the destination Inactive and Probing
>>                 ds_mark_dst("ip");
>>                 if(ds_next_dst())
>>                 {
>>                         t_on_failure("RTF_DISPATCH");
>>                         route(RELAY);
>>                         exit;
>>                 }
>>         }
>> }
>>
>> I suspect that the ds_mark_dst("ip") command in RTF_DISPACTH is the
>> cause.
>> Is there any think I can improve on this? Or any know bug with the
>> dispatcher in Kamailio 5.1.6 version?
>>
>> Thanks in advance,
>>
>> *Sérgio Charrua*
>>
>>
>> _______________________________________________
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>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
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-- 
Arsen Semenov
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