[OpenSIPS-Users] Event E_UL_CONTACT_DELETE delayed

Bogdan-Andrei Iancu bogdan at opensips.org
Wed Jun 1 09:42:15 UTC 2022

Hi Callum,

Please see this discussion here 


Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
OpenSIPS Summit 27-30 Sept 2022, Athens

On 6/1/22 12:17 PM, Callum Guy wrote:
> Hi Team,
> I just wanted to report an incorrect behaviour for a comment from the 
> dev team.
> I'm operating an RTC registrar on 3.2.4 and defining that each device 
> (web console) can have a maximum of one active contact, overridden by 
> any new registration for that AoR. The previously active devices are 
> notified via an internal API call whenever the E_UL_CONTACT_DELETE 
> event is raised, indicating that the session has been closed.
> This works great most of the time however in certain situations such 
> as when a call has recently ended on one device the contact delete 
> event is often delayed by a minute or so. I have resolved this issue 
> by changing the sql_write_mode for usrloc to "write-through" rather 
> than the more performant "write-back" setting I typically rely on.
> Is there any technical reason why we can't have the event generated at 
> the time that the old contact is flagged as deleted rather than the 
> time that this is persisted to the database, as appears to be the 
> current behaviour? I'm comfortable running in write-through mode for 
> now but if there is a scope to fix this I think raising the event in a 
> timely manner seems the correct thing to do.
> Many thanks,
> Callum
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