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

[Dare Awktane (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=205513#comment-205513 ] 

Dare Awktane commented on ASTERISK-21228:
-----------------------------------------

Wanted to add something I've noticed in the messages log when it happens. I believe this is likely caused by the deadlock rather than the cause of but still worth mentioning:

[Apr 19 08:20:28] WARNING[30995][C-000002ca] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:28] WARNING[30995][C-000002ca] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:28] WARNING[30995][C-000002ca] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:41] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short
[Apr 19 08:20:42] WARNING[31021][C-000002cb] res_rtp_asterisk.c: RTP Read too short

                
> 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
>            Severity: Critical
>         Attachments: 1366481920-backtrace_threads.txt, 1366481920-core_show_locks.txt, 1366495718-backtrace_threads.txt, 1366495718-core_show_locks.txt, backtrace-threads.txt, core-show-locks.txt
>
>
> We have two asterisk machines running inbound/outbound/fax calls on both. We've developed a web application that people can use to create accounts (which flow through into asterisk as contexts). We have a cron script that calls -rx "dialplan reload" to update these contexts. Both the extconfig.conf and extensions.conf are loaded from a mysql clustered (ndb) database. Roughly 2-3 times a day each asterisk server stops taking calls and does not restart on its own. I'm not sure if all of the lockups are related to this dump. We braved a morning of bad call quality to have the debug flags set. Our dialplan shows that it has 494197 rows. A reasonably large dialplan.

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