[asterisk-bugs] [Asterisk 0011550]: Prodding channel... causes 100% utilization

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=11550 
====================================================================== 
Reported By:                pj
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   11550
Category:                   Channels/chan_sip/General
Reproducibility:            sometimes
Severity:                   block
Priority:                   normal
Status:                     feedback
Asterisk Version:            SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 92697 
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             12-14-2007 08:37 CST
Last Modified:              01-02-2008 06:57 CST
====================================================================== 
Summary:                    Prodding channel... causes 100% utilization
Description: 
from time to time, asterisk is locked (100% cpu utilization, but not crash)
with "Prodding channel..." messages...
grep "SIP/777-082ae2f8" /var/log/asterisk/messages | wc -l
856979

in my case it happened in entering simple diaplan, calling MoH...
 555 => { Set(TIMEOUT(absolute)=60); MusicOnHold(); }
user is connected over wifi, so maybe some packet was lost in some
critical call stage, that causes sip channel starts looping?

unfortunately, I was not able to do some debugging, because asterisk pc
was completely locked, due to realtime priority of asterisk process...
====================================================================== 

---------------------------------------------------------------------- 
 pj - 01-02-08 06:57  
---------------------------------------------------------------------- 
I recompiled SVN-trunk-r95313 with DONT_OPTIMIZE and DEBUG_THREADS turned
on, I will wait to another deadlock and will try to grab core show locks
output. Do you still need also "thread apply all bt" from deadlocked
asterisk, or it was useless?
I don't know, it it's related, today this build crashed after dial ring
timeout expired. bt, bt full attached... 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
01-02-08 06:57  pj             Note Added: 0076202                          
======================================================================