[OpenSIPS-Devel] Erroneous Retransmissions

[Daniel Zanutti]

Hi Ben

I had a crash issue and asked for help too, no response. It's a terrible
feeling, that you are alone with your problem and no one even respond.

Opensips guys, please respond to us, even with: sorry I have no time to
look at this.

Regards
Daniel

Em qua, 8 de mai de 2019 19:14, Ben Newlin <Ben.Newlin at genesys.com>
escreveu:

> Has anyone had a chance to look into this issue? I was able to mitigate by
> inserting small delays in my test clients, but now I am running into an
> issue where responses from one OpenSIPS to another are being sent quickly
> enough to cause this problem. Making changes in my testbed is one thing,
> but I really don’t want to start injecting delays into my processing script
> to work around this issue.
>
>
>
> The issue is that final responses to a transaction that are received
> within a few milliseconds of the transaction being sent are not stopping
> the retransmission timer. The response is handled properly by OpenSIPS, but
> approximately 500ms later OpenSIPS will retransmit the request anyway. I
> can reproduce it very regularly in our testbed and it should also be easily
> reproducible with a simple SIPp scenario.
>
>
>
> Trace from the latest occurrence is here: https://pastebin.com/YAXFwNLb
>
>
>
> I’d be happy to open an issue on Github as well if that is desired.
>
>
>
> Ben Newlin
>
>
>
> *From: *Devel <devel-bounces at lists.opensips.org> on behalf of Ben Newlin <
> Ben.Newlin at genesys.com>
> *Reply-To: *OpenSIPS devel mailling list <devel at lists.opensips.org>
> *Date: *Thursday, April 25, 2019 at 11:46 AM
> *To: *OpenSIPS devel mailling list <devel at lists.opensips.org>
> *Subject: *Re: [OpenSIPS-Devel] Erroneous Retransmissions
>
>
>
> I have found that this issue seems to only occur when the responses are
> received immediately after the request has been sent; within a few
> milliseconds. Inserting a delay in the response seems to have made the
> erroneous retransmissions stop. This does not make it any less of a bug,
> but does seem to be a workaround.
>
>
>
> Ben Newlin
>
>
>
> *From: *Devel <devel-bounces at lists.opensips.org> on behalf of Ben Newlin <
> Ben.Newlin at genesys.com>
> *Reply-To: *OpenSIPS devel mailling list <devel at lists.opensips.org>
> *Date: *Friday, April 19, 2019 at 8:47 AM
> *To: *OpenSIPS devel mailling list <devel at lists.opensips.org>
> *Subject: *[OpenSIPS-Devel] Erroneous Retransmissions
>
>
>
> Resending the issue described below to the devel mailing list as I believe
> this is a bug, not a configuration issue.
>
>
>
> Ben Newlin
>
>
>
> *From: *Users <users-bounces at lists.opensips.org> on behalf of Ben Newlin <
> Ben.Newlin at genesys.com>
> *Reply-To: *OpenSIPS users mailling list <users at lists.opensips.org>
> *Date: *Monday, April 15, 2019 at 7:20 PM
> *To: *OpenSIPS users mailling list <users at lists.opensips.org>
> *Subject: *Re: [OpenSIPS-Users] Erroneous Retransmissions
>
>
>
> Just wanted to bump this to see if anyone has had a chance to take a look.
> We are continuing to see this failing our tests intermittently. I have a
> new example here: https://pastebin.com/kQJSGE56.
>
>
>
> In this example you can see that the retransmission of the INVITE is
> occurring not just after the 100 Trying has been received, but also after a
> 500 final response has already been received and is being processed, but
> the INVITE is still retransmitted!
>
>
>
> Any help on this would be greatly appreciated.
>
>
>
> # opensips -V
>
> version: opensips 2.4.5 (x86_64/linux)
>
> flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC,
> F_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
>
> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
> MAX_URI_SIZE 1024, BUF_SIZE 65535
>
> poll method support: poll, epoll, sigio_rt, select.
>
> git revision: d025b4f61
>
> main.c compiled on 21:18:18 Apr 12 2019 with gcc 7
>
>
>
> Ben Newlin
>
>
>
> *From: *Users <users-bounces at lists.opensips.org> on behalf of Ben Newlin <
> Ben.Newlin at genesys.com>
> *Reply-To: *OpenSIPS users mailling list <users at lists.opensips.org>
> *Date: *Thursday, April 4, 2019 at 3:10 PM
> *To: *OpenSIPS users mailling list <users at lists.opensips.org>
> *Subject: *[OpenSIPS-Users] Erroneous Retransmissions
>
>
>
> Hello,
>
>
>
> We are seeing an issue which is causing our tests to fail intermittently.
> It appears that sometimes OpenSIPS will retransmit a relayed INVITE
> request, even though a 100 Trying response has already been received and
> processed. This only happens intermittently.
>
>
>
> I have captured debug logs for the scenario: https://pastebin.com/bHcBJmtv.
> In the log, you can see the 100 Trying response is received on line 707 and
> it appears to be matched to the correct transaction on line 729. However
> then on line 774 you can see the retransmission of the INVITE anyway.
>
>
>
> I have verified using tcpdump that the INVITE is being retransmitted; it
> is not just a log error. And our tests are failing due to the unexpected
> extra 100 Trying response to the retransmission.
>
>
>
> Can anyone explain why this would occur?
>
>
>
> Ben Newlin
> _______________________________________________
> Devel mailing list
> Devel at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/devel
>
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