[asterisk-bugs] [JIRA] Commented: (ASTERISK-20552) Locked (channel.c): MUTEX 4845 ast_write chan SVN-branch-1.8-r374802

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=198279#comment-198279 ] 

Matt Jordan commented on ASTERISK-20552:
----------------------------------------

Something got all hung up on the DEBUG_THREADs lock.  This most likely won't occur if you don't have DEBUG_THREADs enabled.

That being said, I have no idea why the DEBUG_THREADs re-entrancy lock would cause something to block (permanently).  Nothing has really been changed in the locking code recently, so its interesting that you would just now run into this.

> Locked (channel.c): MUTEX 4845 ast_write chan SVN-branch-1.8-r374802
> --------------------------------------------------------------------
>
>                 Key: ASTERISK-20552
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20552
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>    Affects Versions: SVN
>            Reporter: aragon
>         Attachments: thread apply all bt.txt
>
>
> First a bunch of these queue_frame warnings and then I checked core show locks and attached gdb.
> GDB debug info attached.
> [2012-10-10 21:09:19] WARNING[22800]: channel.c:1507 __ast_queue_frame: Exceptionally long voice queue length queuing to Local/6147 at default-agent-00000006;1
> [2012-10-10 21:09:19] WARNING[22800]: channel.c:1507 __ast_queue_frame: Exceptionally long voice queue length queuing to Local/6147 at default-agent-00000006;1
> [2012-10-10 21:09:19] WARNING[22873]: channel.c:1507 __ast_queue_frame: Exceptionally long voice queue length queuing to Local/6120 at default-agent-0000001d;2
> 6000*CLI> core show locks
> =======================================================================
> === Currently Held Locks ==============================================
> =======================================================================
> ===
> === <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
> ===
> === Thread ID: 0x41387940 (pbx_thread           started at [ 5374] pbx.c ast_pbx_start())
> === ---> Lock #0 (channel.c): MUTEX 4845 ast_write chan 0x1fd3c4c0 (1)

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