[OpenSIPS-Users] Re-homing a large number of subscribers

[Bogdan-Andrei Iancu]

Hi Ben,

Use paging (index and count) when fetching the dialgs:
https://opensips.org/html/docs/modules/3.6.x/dialog.html#mi_dlg_list

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
   https://www.siphub.com

On 09.07.2025 13:11, Ben Laing via Users wrote:
>
> Hi folks,
>
> I’m using OpenSIPs as a load balancer in an active/active setup. I’m 
> trying to set up call re-homing when a node in the cluster goes down, 
> largely following 
> https://blog.opensips.org/2019/10/03/re-homing-your-calls-with-opensips-3-0/ 
> . I’ve got separate shtags lb1 and lb2 for each node.
>
> When the cluster down is detected, I am running a python script that 
> sets the remaining node as active then aims to rehome the calls in 
> progress. Currently, that works by getting dlg_list_ctx, then running 
> dlg_send_sequential for each dialog with a shtag matching the down 
> node (dialog[‘context’][‘values’][‘dlgX_shtag’].
>
> That’s fine for a few calls, but fails when we get to a few hundred 
> because the dlg_list_ctx throws an error:
> Jul9 09:47:00 ip-10-4-40-11 /usr/sbin/opensips[83438]: 
> ERROR:core:print_mi_response: Failed to print JSON
>
> Jul9 09:47:00 ip-10-4-40-11 /usr/sbin/opensips[83438]: 
> ERROR:mi_http:mi_json_answer_to_connection: failed to print json response
>
> Any ideas recommendations on how to tackle this?
>
> I could use dlg_list_ctx specifying an index/counter to complete in 
> batches, but I’m not quite sure how the indexing works so there’s a 
> worry we’d miss calls. E.g. we do calls 0-40 then 41-80 but if call 0 
> ends while processing 0-40, does that mean call 41 becomes call 40 so 
> it’s missed from the 41-80 batch.
>
>
> Probably the best solution I have at the moment is to query the DB 
> directly to get the definitively list of call ids, then run 
> dlg_list_ctx specifying and iID then dlg_send_sequential if 
> appropriate. Or just don’t bother checking and run dlg_send_sequential 
> on them all.
>
> Any thoughts / suggestions?
>
> Best,
>
> ‑‑‑‑‑
>
> *Ben Laing***
>
> 	
>
> 	
>
> He/Him
>
> Senior Software Developer
>
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>
> Email: _ben.laing at dals.co.uk_
>
> Website: www.dals.co.uk <http://www.dals.co.uk/>
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