[asterisk-bugs] [Asterisk 0013755]: Avoiding deadlock for channel problem

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=13755 
====================================================================== 
Reported By:                chivilis
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   13755
Category:                   Core/Channels
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.22 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             2008-10-21 13:50 CDT
Last Modified:              2008-10-22 14:49 CDT
====================================================================== 
Summary:                    Avoiding deadlock for channel problem
Description: 
Hello, 

I have HP Proliant server with 1 E1 and 8 BRI Sangoma cards installed. I
have noticed that in period of one day I have and error, when user calls,
hears 'ringing' alert, agent answers, but user still hears 'ringing' tone.

I set debug mode in logger.conf and I noticed that when calls enters the
queue, and starts ringing 'Avoinding deadlock for channel' errors appears
and repeats many times.

All debug information is attached.
====================================================================== 

---------------------------------------------------------------------- 
 (0094163) putnopvut (administrator) - 2008-10-22 14:49
 http://bugs.digium.com/view.php?id=13755#c94163 
---------------------------------------------------------------------- 
Thanks for reporting the problem. This sounds like a deadlock is happening.
The best way to go about diagnosing one of these is to run `make
menuselect` and enable the DONT_OPTIMIZE and DEBUG_THREADS options. Then
recompile Asterisk. When the problem starts occurring (the "Avoiding
deadlock" messages appear), run the command "core show locks." Upload the
output of that command as well as the rest of the console output from that
failure.

Thanks again! 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2008-10-22 14:49 putnopvut      Note Added: 0094163                          
======================================================================