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

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11550 
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Reported By:                pj
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11550
Category:                   Channels/chan_sip/General
Reproducibility:            sometimes
Severity:                   block
Priority:                   normal
Status:                     new
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:              
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Date Submitted:             12-14-2007 08:37 CST
Last Modified:              12-26-2007 12:36 CST
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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...
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---------------------------------------------------------------------- 
 pj - 12-26-07 12:36  
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trunk-r93763
issue still persist and asterisk crash after many "prodding channel"
cycles, so I'm not able to attach gdb to running asterisk process,
crash dump is now not generated, even if I have in asterisk.conf 
[options]
dumpcore = yes


[Dec 26 15:06:59] ERROR[2914] chan_sip.c: We could NOT get the channel
lock for SIP/777-0821fbd8!
[Dec 26 15:06:59] ERROR[2914] chan_sip.c: SIP transaction failed:
936481778 at 10.53.34.221
[Dec 26 15:07:59] WARNING[2914] channel.c: Prodding channel
'SIP/777-0821fbd8' failed
.......
.......
[Dec 26 15:09:52] WARNING[2914] channel.c: Prodding channel
'SIP/777-0821fbd8' failed
[Dec 26 15:12:53] NOTICE[3675] cdr.c: CDR simple logging enabled.
[Dec 26 15:12:54] NOTICE[3675] loader.c: 86 modules will be loaded. 

Issue History 
Date Modified   Username       Field                    Change               
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12-26-07 12:36  pj             Note Added: 0075962                          
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