[asterisk-bugs] [Asterisk 0012269]: [branch] Deadlock after Originate from AMI to Agent

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=12269 
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Reported By:                IgorG
Assigned To:                jpeeler
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Project:                    Asterisk
Issue ID:                   12269
Category:                   Channels/chan_agent
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     closed
Asterisk Version:           SVN 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 110444 
Disclaimer on File?:        N/A 
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2008-03-21 03:15 CDT
Last Modified:              2009-01-12 14:53 CST
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Summary:                    [branch] Deadlock after Originate from AMI to Agent
Description: 
I have discovered deadlock while using chan_agent and originate cal via
AMI. To reproduce need one agent and one registered phone. 

1) Login via AMI and make originate call
2) Answer a call both sides, talk and hangup phone.
3) After hangup MoH for agent doesn't starts and CLI show ERRORs:

    -- Started music on hold, class 'default', on SIP/104-08362618
[Mar 21 13:35:21] ERROR[8145]:
/usr/src/voip/asterisk-trunk/asterisk-trunk.patched-cng/include/aster:461
__ast_pthread_mutex_unlock: chan_agent.c line 843 (agent_hangup): attempted
unlock mutex '&p->app_lock' without owning it!
[Mar 21 13:35:21] ERROR[8145]:
/usr/src/voip/asterisk-trunk/asterisk-trunk.patched-cng/include/aster:463
__ast_pthread_mutex_unlock: chan_agent.c line 979 (agent_new):
'&p->app_lock' was locked here.
[Mar 21 13:35:21] ERROR[8145]:
/usr/src/voip/asterisk-trunk/asterisk-trunk.patched-cng/include/aster:486
__ast_pthread_mutex_unlock: chan_agent.c line 843 (agent_hangup): Error
releasing mutex: Operation not permitted

3) 'agent show online' still show called side in list

server-voip*CLI> agent show online
1001         (Vasya Pupkin) logged in on SIP/104-08362618 is idle
(musiconhold is 'default')
1 agents online>

3) After second try to Originage, originate fail and using CLI command
'agent show online' fail and make CLI frozen
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Relationships       ID      Summary
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related to          0013860 Show queue and EventQueueStatus showing...
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---------------------------------------------------------------------- 
 (0097528) svnbot (reporter) - 2009-01-12 14:53
 http://bugs.digium.com/view.php?id=12269#c97528 
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Repository: asterisk
Revision: 168508

_U  trunk/
U   trunk/channels/chan_agent.c

------------------------------------------------------------------------
r168508 | jpeeler | 2009-01-12 14:53:05 -0600 (Mon, 12 Jan 2009) | 15
lines

Merged revisions 168507 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r168507 | jpeeler | 2009-01-12 14:26:22 -0600 (Mon, 12 Jan 2009) | 9
lines
  
  (closes issue http://bugs.digium.com/view.php?id=12269)
  Reported by: IgorG
  Tested by: denisgalvao
  
  This gits rid of the notion of an owning_app allowing the request and
hangup to be initiated by different threads. Originating from an active
agent channel requires this. The implementation primarily changes
__login_exec to wait on a condition variable rather than a lock.
  
  Review: http://reviewboard.digium.com/r/35/
........

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http://svn.digium.com/view/asterisk?view=rev&revision=168508 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-01-12 14:53 svnbot         Checkin                                      
2009-01-12 14:53 svnbot         Note Added: 0097528                          
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