[asterisk-bugs] [JIRA] (ASTERISK-24600) Stuck IAX channels, Asterisk stops responding to most traffic, potential deadlock

[Jeff Collell (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-24600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeff Collell updated ASTERISK-24600:
------------------------------------

    Attachment: iax.txt
                threads.txt

Here is "core show threads", and "iax2 show channels" (no channels shown this time, but asterisk was at 25% on 2 threads for this occurrence of the bug).

> Stuck IAX channels, Asterisk stops responding to most traffic, potential deadlock
> ---------------------------------------------------------------------------------
>
>                 Key: ASTERISK-24600
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24600
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_iax2
>    Affects Versions: 13.0.1
>         Environment: Ubuntu 14.04.1 LTS (trusty) x86_64
>            Reporter: Jeff Collell
>            Assignee: Jeff Collell
>         Attachments: asterisk-bug.PNG, backtrace-threads.txt, core-show-locks.txt, iax.conf, iax_other_side.conf, iax.txt, threads-of-interest.txt, threads.txt
>
>
> Setup:
> 20 endpoints, register locally over SIP (no NAT)
> 1 IAX trunk to another remote Asterisk box (unauthenticated, IP restricted on firewalls)
> Server randomly gets 2 IAX channels "stuck" (most likely after the call has ended since we haven't had complaints of dropped calls), stops responding to IAX, SIP registrations, etc. High CPU usage on 2 threads (see attached).
> Issue seems to be happening randomly with calls over trunk (SIP to IAX and IAX to SIP). I can reproduce it by simply creating lots of channels over the trunk (it's not rare, but more channels just means I get the issue to happen sooner, not a load issue). Happens every few dozen calls made by the client (about daily since this is a small office).
> Our next steps will be to configure a SIP trunk between sites to isolate if the issue is IAX specific.



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