[asterisk-bugs] [Asterisk 0017416]: MGCP Zombie Channel

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17416 
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Reported By:                juanctkc
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17416
Category:                   Channels/chan_mgcp
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.30 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-05-28 11:11 CDT
Last Modified:              2010-06-02 10:45 CDT
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Summary:                    MGCP Zombie Channel
Description: 
sometimes are show zombies mgcp channels on asterisk . phone client's dont
be hangup, and latter asterisk don't answer anything to "restart now" and
we can't do other calls from anothers telephones. I have to do and "soft
hangup" for that zombie channel to asterisk work correctly again.

show channels 
Channel              Location             State   Application(Data)       
     
MGCP/aaln/1 at 0015cef9e074.mta-0<ZOMBIE> s at macro-stdexten:1   Down   
Dial(MGCP/aaln/1 at 0015cef9e074.

There is a bug? what can i do to check don't happen again?
Thanks for all.
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 (0122780) lmadsen (administrator) - 2010-06-02 10:45
 https://issues.asterisk.org/view.php?id=17416#c122780 
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We will need additional information here. It is possible this could be a
deadlock, but there isn't enough information to tell. There isn't a lot of
support for MGCP, so you may have to find other MGCP developers elsewhere
in order to move this issue forward. But for now we'll start with debugging
information.

Find below some information.

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We require a complete debug log to help triage the issue.

This document will provide instructions on how to collect debugging logs
from an Asterisk machine for the purpose of helping bug marshals
troubleshoot an issue:

http://svn.digium.com/svn/asterisk/trunk/doc/HOWTO_collect_debug_information.txt

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Debugging deadlocks:

Please select DEBUG_THREADS and DONT_OPTIMIZE in the Compiler Flags
section of menuselect. Recompile and install Asterisk (i.e. make install)

This will then give you the console command:

core show locks 

When the symptoms of the deadlock present themselves again, please provide
output of the deadlock via:

# asterisk -rx "core show locks" | tee /tmp/core-show-locks.txt

# gdb -se "asterisk" <pid of asterisk> | tee /tmp/backtrace.txt

gdb> bt
gdb> bt full
gdb> thread apply all bt

Then attach the core-show-locks.txt and backtrace.txt files to this issue.
Thanks!
Thank you for the bug report. However I am unable to reproduce this issue.
We are now going to close this report - please feel free to reopen when you
have more information at hand. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-06-02 10:45 lmadsen        Note Added: 0122780                          
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