[Kamailio-Users] Dialog profile size not resetting in 1.4.4.

[Daniel-Constantin Mierla]

Hello,

On 05/19/2009 05:22 PM, Alex Balashov wrote:
> Daniel,
>
> I think I posted too early.  I am having trouble consistently 
> reproducing the problem and will reply when I have more information 
> about the exact confluence of circumstances that causes it.
>   
ok, thanks,
Daniel

> -- Alex
>
> Daniel-Constantin Mierla wrote:
>
>   
>> Hello,
>>
>> On 05/19/2009 02:32 PM, Alex Balashov wrote:
>>     
>>> Greetings,
>>>
>>> I've run into an issue with 1.4.4 in which the following appears to be 
>>> happening, and I'm yet to determine the cause:
>>>
>>> The total amount of open inbound calls (dialogs) is tracked with the 
>>> dialog module by putting them in a global profile.  Because of a 
>>> segfault bug with profiles with "no values,"
>>>       
>> do you have a backtrace?
>>
>>     
>>>  a workaround is used wherein a profile "with" values is created and 
>>> the hash key is always the same value (i.e. "1").   The dialog 
>>> tracking flag is 2:
>>>
>>>     modparam("dialog", "dlg_flag", 2)
>>>
>>> And profile looks like this:
>>>
>>>    modparam("dialog", "profiles_with_value", 
>>> "globalinbound;specificinbound")
>>>
>>> Anyway, inbound INVITEs get handed off to a route (route[1]) that 
>>> performs some logic like this:
>>>
>>>    route[1] {
>>>        # Check if DID is assigned to an account with database
>>>        # and store value in AVP, along with other values.
>>>
>>>        if($avp(S:did_assigned) == "0") {
>>>            sl_send_reply("404", "Not Found");
>>>            exit;
>>>        }
>>>
>>>        get_profile_size("specificinbound", "$avp(S:account_id)", 
>>> "$var(a_concurrent_calls)");
>>>
>>>        if($var(a_concurrent_calls) >= $avp(S:port_limit)) {
>>>            sl_send_reply("486", "Busy");
>>>            exit;
>>>        }
>>>
>>>        setflag(2);   # Track dialog.
>>>
>>>        set_dlg_profile("globalinbound", "1");
>>>        set_dlg_profile("specificinbound", "$avp(S:account_id)");
>>>    }
>>>
>>> What appears to be happening is that calls coming into unassigned 
>>> numbers ($avp(S:did_assigned) == "0") increase the size of the 
>>> "globalinbound" profile, which is something of a mystery to me since I 
>>> am neither setting flag 2 nor calling set_dlg_profile() until further 
>>> down in the logic!
>>>       
>> This is very improbable to happen if you do not call dlg profile set 
>> function. Can you add some xlogs around to see when these functions are 
>> executed?
>>
>> As you use the flag mechanism, the dialog is actually created inside 
>> t_relay(), upon a tm callback.
>>
>> Cheers,
>> Daniel
>>
>>     
>>>   And after the 404 Not Found reply is sent, the profile size is not 
>>> decremented.  Is the use of statefully tracked replies (t_reply()) 
>>> required in order to propagate dialog state through to the dialog 
>>> module?  My impression is this was not the case.
>>>
>>> More pressing concern is that profile size is increased and not 
>>> decreased;  in my interpretation, such calls should not be added to 
>>> the 'globalinbound' profile at all.
>>>
>>> I have not had the opportunity to try to reproduce this with 1.5.x.
>>>
>>> Thanks!
>>>
>>>   
>>>       
>
>
>   

-- 
Daniel-Constantin Mierla
http://www.asipto.com/