[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:                file
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Project:                    Asterisk
Issue ID:                   13839
Category:                   Core/PBX
Reproducibility:            random
Severity:                   major
Priority:                   normal
Status:                     closed
Asterisk Version:           1.4.19 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2008-11-04 15:57 CST
Last Modified:              2009-01-21 17:27 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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 (0098382) svnbot (reporter) - 2009-01-21 17:27
 http://bugs.digium.com/view.php?id=13839#c98382 
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Repository: asterisk
Revision: 169871

_U  branches/1.6.1/
U   branches/1.6.1/main/pbx.c

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r169871 | file | 2009-01-21 17:27:51 -0600 (Wed, 21 Jan 2009) | 18 lines

Merged revisions 169869 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

................
  r169869 | file | 2009-01-21 19:25:27 -0400 (Wed, 21 Jan 2009) | 11 lines
  
  Merged revisions 169867 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r169867 | file | 2009-01-21 19:20:47 -0400 (Wed, 21 Jan 2009) | 4
lines
    
    Read lock the contexts to maintain the locking order when we are
notified that the state of a device has changed.
    (closes issue http://bugs.digium.com/view.php?id=13839)
    Reported by: mcallist
  ........
................

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http://svn.digium.com/view/asterisk?view=rev&revision=169871 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-01-21 17:27 svnbot         Checkin                                      
2009-01-21 17:27 svnbot         Note Added: 0098382                          
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