[Kamailio-Users] [Kamailio-Devel] Kamailio 1.4.2 : Weird Retransmission
Daniel-Constantin Mierla
miconda at gmail.com
Fri Dec 12 10:40:58 CET 2008
On 12/12/08 11:36, Daniel-Constantin Mierla wrote:
> one question for you, is your system multi-processor?
>
actually, please give the specs of your system: number of cpu and
architecture, os, kernel, ...
Cheers,
Daniel
> Cheers,
> Daniel
>
> On 12/12/08 10:30, Aurelien Grimaud wrote:
>
>> Daniel-Constantin Mierla a écrit :
>>
>>> can you try this new patch? It adds a new debug messages for
>>> troubleshooting -- you have to revert the previous patch as this one
>>> includes it. you can send it to me without ngrep, maybe i can catch it.
>>>
>> First try, without ngrep or tcpdump.
>> BYE for CALL-ID=3-18225-127.0.0.1 is retransmitted.
>>
>> I'll send the sipp messages but timestamps it provides seems wrong on
>> messages sent.
>>
>> Aurelien
>>
>>> Thanks,
>>> Daniel
>>>
>>> On 12/11/08 18:22, Aurelien Grimaud wrote:
>>>
>>>> Well, it seems hard to reproduce with ngrep running ..
>>>> It seems like the timing is not the same anymore and ngrep slow down
>>>> the computer just enough for bug not to trigger.
>>>> I tried many times and the result is that when ngrep is not running,
>>>> the bug shows up, while wth ngrep it stay hidden.
>>>> I hope last log from sipp were enough.
>>>>
>>>> However, this retransmission should not disturb the remote user and
>>>> while nasty race should be handled, this is minor for me.
>>>> My real problem, concerns transaction module too and is more troubling.
>>>> This is the one I related in
>>>> http://lists.kamailio.org/pipermail/users/2008-December/020882.html
>>>>
>>>> I use this timer triggering to fail over another end user and
>>>> implement serial forking.
>>>> If the timer triggers while it should not, I will initiate a second
>>>> call to another destination, which is wrong.
>>>>
>>>> Any idea on this one ?
>>>>
>>>> This is while trying to reproduce it that I found those weird
>>>> retransmission.
>>>> I'll try and trigger this initial bug again.
>>>>
>>>> Regards
>>>>
>>>> Aurelien
>>>>
>>>> Aurelien Grimaud a écrit :
>>>>
>>>>> Sure, meanwhile here are messages provided by sipp
>>>>> UAS side and UAC side.
>>>>> UAC contains only the 10 calls done
>>>>> UAS contains much more as I was trying to reproduce it with 1 call
>>>>> at a time.
>>>>>
>>>>> Aurelien
>>>>>
>>>>> Daniel-Constantin Mierla a écrit :
>>>>>
>>>>>> Can you please make the test again and send along with the debug
>>>>>> messages the sip trace?
>>>>>>
>>>>>> ngrep -d any -qt -W byline port 5060
>>>>>>
>>>>>> I want to check the sip messages as well.
>>>>>>
>>>>>> Thank you,
>>>>>> Daniel
>>>>>>
>>>>>>
>>>>>> On 12/11/08 16:19, Aurelien Grimaud wrote:
>>>>>>
>>>>>>> Answer waiting for approval : logs too big !
>>>>>>>
>>>>>>> Here is a lighter one.
>>>>>>>
>>>>>>> My answer was
>>>>>>>
>>>>>>>> Thanks for the patch.
>>>>>>>>
>>>>>>>> With 1 call at a time, the bug does not trigger anymore.
>>>>>>>> However, with 2 calls at a time it was triggered again on BYE.
>>>>>>>> Attached log is result of my testing.
>>>>>>>> 1 sipp as uac make 10 calls with 2 simultaneous calls allowed.
>>>>>>>>
>>>>>>>> The call callid=7-22285-127.0.0.1 request resending of BYE
>>>>>>>> message at 14:21:07.563004, though we have a 200 ok on BYE at
>>>>>>>> 14:21:07.156865 (pid=21493)
>>>>>>>> Bye request (pid=21495) was not finished to be treated at the
>>>>>>>> time 200 ok was received.
>>>>>>>>
>>>>>>>> This was done with my module active.
>>>>>>>> I'll make new tests without it.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Aurelien
>>>>>>>>
>>>>>>> Daniel-Constantin Mierla a écrit :
>>>>>>>
>>>>>>>> ... disregard the previous patch, please use this one. It was
>>>>>>>> not the latest. Thanks,
>>>>>>>>
>>>>>>>> Daniel
>>>>>>>>
>>>>>>>>
>>>>>>>> On 12/10/08 23:52, Daniel-Constantin Mierla wrote:
>>>>>>>>
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> On 12/09/08 20:41, Aurelien Grimaud wrote:
>>>>>>>>>
>>>>>>>>>> Daniel-Constantin Mierla a écrit :
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> On 12/09/08 18:52, Aurelien Grimaud wrote:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> I am able to reproduce it with 1 call / second without my
>>>>>>>>>>>> module on BYE requests.
>>>>>>>>>>>> here are traces.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> there is a race (at least), indeed. It happens when there is
>>>>>>>>>>> fast reply. I am going to send you a patch soon for testing,
>>>>>>>>>>> you use svn branch 1.4 or the tarball?
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Great, I use the kamailio-1.4.2-notls tarball.
>>>>>>>>>> But I can test any SVN branch / trunk if you wish.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> can you test the attached patch with SVN trunk? Let me know the
>>>>>>>>> results. Pay attention to see if breaks something else, not
>>>>>>>>> just if fixes the reported issue. I let there some debug
>>>>>>>>> messages, to help troubleshooting, if the fix is ok, I'll
>>>>>>>>> remove them before committing.
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Daniel
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Aurelien
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> Cheers,
>>>>>>>>>>> Daniel
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> ps: I added the ms on Logs.
>>>>>>>>>>>>
>>>>>>>>>>>> Aurelien
>>>>>>>>>>>>
>>>>>>>>>>>> Daniel-Constantin Mierla a écrit :
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> On 12/09/08 17:56, Klaus Darilion wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Daniel-Constantin Mierla schrieb:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On 12/09/08 17:31, Klaus Darilion wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Aurelien Grimaud schrieb:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Fair enough.
>>>>>>>>>>>>>>>>> If no one already experienced this strange behavior, it
>>>>>>>>>>>>>>>>> should be my module ...
>>>>>>>>>>>>>>>>> I'll try to make it again without my module.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> See my other email.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> However, in the log, after the 200 response, there is a
>>>>>>>>>>>>>>>>> cleanup_uac_timers: RETR/FR timers reset.
>>>>>>>>>>>>>>>>> So those timers are cleared.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> But the problem is, that the process which handles the
>>>>>>>>>>>>>>>> INVITE has not finished yet and those (re)SETS the timer.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @Daniel - Have you investigated the problem?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> so this is the half of the issue reported via:
>>>>>>>>>>>>>>> https://sourceforge.net/tracker/index.php?func=detail&aid=2105813&group_id=139143&atid=743020
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> yes.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Can it be related to other modules which register
>>>>>>>>>>>>>> callbacks (e.g. pua module or Aurelien's module?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> what is the requests/second rate when the issue appears?
>>>>>>>>>>>>>
>>>>>>>>>>>>> At first look, between sending and setting retransmission
>>>>>>>>>>>>> timer, there is no much processing for the request. The
>>>>>>>>>>>>> callback executed there is in use by siptrace, are you
>>>>>>>>>>>>> using this module?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Cheers,
>>>>>>>>>>>>> Daniel
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>>> This one got lost, but as I started to fix the other half
>>>>>>>>>>>>>>> (replying using proper mode to do retransmission), will
>>>>>>>>>>>>>>> investigate this as well ...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Cheers,
>>>>>>>>>>>>>>> Daniel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
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>>>>>>>>>> Users at lists.kamailio.org
>>>>>>>>>> http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>>
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>>>>>
>>>>>
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>>>>>
>>>>>
>>>>
>
>
--
Daniel-Constantin Mierla
http://www.asipto.com
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