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

[Alex Balashov]

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.

-- 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!
>>
>>   
> 


-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (678) 237-1775