[asterisk-bugs] [JIRA] (ASTERISK-27911) Deadlock, likely when delegating calls from queue with Redirect

[Joshua Colp (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=243778#comment-243778 ] 

Joshua Colp commented on ASTERISK-27911:
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It appears the bug you have submitted is against a rather old version of a supported branch of Asterisk. There have been many issues fixed between the version you are using and the current version of your branch. Please test with the latest version in your Asterisk branch and report whether the issue persists.

Please see the Asterisk Versions [1] wiki page for info on which versions of Asterisk are supported.
[1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions

Specifically 13.1.0 was released:

Date:   Mon Dec 15 15:37:36 2014 +0000

Trying to track down a specific change from then to now for your particular problem would take quite a long time, so updating is really needed before we would look into such a thing.

> Deadlock, likely when delegating calls from queue with Redirect
> ---------------------------------------------------------------
>
>                 Key: ASTERISK-27911
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27911
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: 13.1.0
>         Environment: Ubuntu 16.04.4 LTS, running on VMware
>            Reporter: Örn Arnarson
>            Severity: Critical
>         Attachments: backtrace-threads.txt, backtrace-threads.txt, core-show-locks.txt, core-show-threads.txt
>
>
> We have a PBX running with approx. 16 concurrent calls usually. Not a call center, so a fair number of calls that are producing the calls.
> We are experiencing several deadlocks per week with this PBX, likely in Chan_SIP, as the PBX stops processing new INVITES, yet the CLI seems to be working and the only way to stop is by using kill -9.
> We have a suspicion that this issue is caused when "picking up" calls from a call queue using FOP2, which actually uses Redirect via AMI. This may or may not happen also when we use Originate via AMI calling the PickupChan application. We haven't been able to confirm that.
> Asterisk was installed from the Ubuntu packaging system. We believe we have a recorded incident with backtraces and locks after having compiled the ubuntu package with the unoptimized and debug threads flags set. We are not certain though, as this rendered Asterisk too slow for production and we were dropping calls, so maybe it was an unrelated issue. But likely it was the same deadlock.
> The reason we haven't upgraded to a newer version as of yet is that we are running from an Ubuntu package and would prefer to keep it that way if possible, but of course are willing to update if it turns out that this is a known and fixed bug.



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