[Kamailio-Users] [Kamailio-Devel] Kamailio 1.4.2 : Weird Retransmission
Daniel-Constantin Mierla
miconda at gmail.com
Fri Dec 12 10:16:47 CET 2008
thanks. it looks there is still a potential or race in arming timers. i
will send you a new patch.
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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>>>>>>>>>
>>>>>>>>>
>>>>>>>>
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>
--
Daniel-Constantin Mierla
http://www.asipto.com
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