[asterisk-bugs] [Asterisk 0013839]: call processing deadlock with dialplan reload and ast_hint_state_changed

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13839 
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Reported By:                mcallist
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13839
Category:                   Core/PBX
Reproducibility:            random
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.19 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-11-04 15:57 CST
Last Modified:              2008-11-04 15:59 CST
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Summary:                    call processing deadlock with dialplan reload and
ast_hint_state_changed
Description: 
I had a dialplan reload hit while a state change was taking place.  Looking
at core, it appears that the conlock was taken by
ast_merge_context_and_delete() and the hints lock was taken by
ast_hint_state_changed()  

The hint state change eventually came to ast_hint_extension() which
attempts to grab conlock.  In the mean time calls were stacking up.  I
forced a Segfault to get a core file and dug in to get this information.
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 (0094572) mcallist (reporter) - 2008-11-04 15:59
 http://bugs.digium.com/view.php?id=13839#c94572 
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the debug file has:
thread apply all bt

and then a full bt for thread 103 and 185 which are the ones I believe to
be deadlocked.

and a print on hints and conlock to show the problem. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-11-04 15:59 mcallist       Note Added: 0094572                          
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