[Freeswitch-users] Missing sending BYE and missing OK message

Claus Andersen clan at wheel.dk
Fri Feb 21 13:10:07 MSK 2014

On Fri, 21 Feb 2014, Georgi Stefanov wrote:

> Thanks for the suggestion Claus
> But of course I have tried with one call - no problem
> In matter of fact no problem is seen up to 25 CPS and 250 total calls (10 sec call duration)
> Somewhere between 25 and 40 CPS the problem is rarely shown.
> The issue become more obvious around 100 CPS
> I thought it could be an issue, but I need to know I have missed some setting  or not.
> It sounds like a bug to me

SIP usually fares much better than RTP and I would expect you to see 
problems with the RTP streams before seeing issues with SIP traffic. Have 
you verified the "voice" quality at high call rates? Are you actaully able 
to push the limits without dropping packets?

I assume that you have seen:

Of particular intereset is bandwidth calculator. What can you actually 
expect (best case) with you current setup (LAN, codec etc).

And if you are still running 32 bit is suggest that you are running on 
older hardware. As you can see from:

You should be able to push 250 calls with 20 CPS with 15% CPU on an EC2 
instance with (2,4 Ghz and 4 GB RAM).

I do not have enough experience pushing over the hardware limits so I do 
not know what to expect of Freeswitch. Proper stress testing is hard 
enough in itself. But my immediate reactions was that I am 
very surprised that you are not seeing anything in the Freeswitch log on 
the offending server not sending the final OK. If you are pushing over 
some limits you would normally see something.

My first bet would be to turn up logging in sofia:

Try comparing the log output for a successfull call with a tainted call 
under load.

I would be very very surprised if this turns out to be a bug where 
Freeswitch silently drops actions without having logged it anywhere. With 
the info supplied so far it sounds more like a setup issue.

Kind Regards,
Claus Andersen

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