[asterisk-bugs] [JIRA] (ASTERISK-21228) Deadlock in pbx_find_extension when attempting an autoservice stop due to holding the context lock

[Tilghman Lesher (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=205881#comment-205881 ] 

Tilghman Lesher commented on ASTERISK-21228:
--------------------------------------------

Matt:  I agree that ao2 would be a nice thing to do to the pbx core, but that is a massive undertaking.  I think this patch will solve the immediate problem in short order.  I was actually thinking about this solution when I wrote the patch that converted the rwlocks back to mutexes, but I abandoned that approach, because I thought that mutexes would be a simpler solution.  So as it turned out, mutexes were too simple.
                
> Deadlock in pbx_find_extension when attempting an autoservice stop due to holding the context lock
> --------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-21228
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21228
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Core/PBX
>    Affects Versions: 1.8.20.1, 1.8.21.0, 11.2.1, 11.3.0
>         Environment: Linux 3.2.0-38-generic #61-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux
>            Reporter: Dare Awktane
>         Attachments: 1366481920-backtrace_threads.txt, 1366481920-core_show_locks.txt, 1366495718-backtrace_threads.txt, 1366495718-core_show_locks.txt, 20130425__AST-21228.patch, backtrace-threads.txt, core-show-locks.txt
>
>
> Due to the way locks are maintained it appears as though our realtime switch calls in our extensions.conf, which are also stored in the database via odbc, are causing a conflict. We have 5500 contexts any of which can be called at any time as each one exists to maintain separation between our customers.

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