[asterisk-bugs] [Asterisk 0014178]: CLI hang and unresponsive when issuing "show channels" or "core show channels"

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=14178 
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Reported By:                greenfieldtech
Assigned To:                putnopvut
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Project:                    Asterisk
Issue ID:                   14178
Category:                   General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.22 
Regression:                 No 
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:             2009-01-06 03:09 CST
Last Modified:              2009-01-08 16:59 CST
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Summary:                    CLI hang and unresponsive when issuing "show
channels" or "core show channels"
Description: 
Asterisk CLI becomes un-responsive after issuing "show channels" or "core
show channels". The issue is exhibited on Asterisk 1.4.22 release. The
issue had also been exhibited with using versions 1.4.21.X and 1.4.20.
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 (0097253) putnopvut (administrator) - 2009-01-08 16:59
 http://bugs.digium.com/view.php?id=14178#c97253 
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Sorry, I didn't get an e-mail notification that you had added a note, which
is why I didn't respond at all yesterday.

A quick glance at the output shows that there is a conflict of lock order
occurring between local_pvt structures and ast_channel structures.
Specifically, in your output, threads 1084942656 and 1076431168 are the
competing threads. What you are saying about the CLI becoming responsive
again makes sense, too, considering that thread 1076431168 will eventually
just give up trying to get the lock and everything will "unwind" after
that. I'll see if this can be avoided. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-01-08 16:59 putnopvut      Note Added: 0097253                          
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