[asterisk-bugs] [Asterisk 0014309]: [patch] SIP/realtime problems => 100 % CPU

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=14309 
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Reported By:                pkempgen
Assigned To:                lmadsen
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Project:                    Asterisk
Issue ID:                   14309
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     ready for review
Target Version:             1.4.27
Asterisk Version:           SVN 
JIRA:                        
Regression:                 Yes 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-01-22 07:50 CST
Last Modified:              2009-09-24 09:10 CDT
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Summary:                    [patch] SIP/realtime problems => 100 % CPU
Description: 
As reported on
http://lists.digium.com/pipermail/asterisk-users/2009-January/225274.html
:

> Carlos Chavez schrieb:
>> 	Since 1.4.22 realtime status for sip peers seems to be broken.  If I
do
>> a "sip show peers" from the CLI I get this:
>> 
>> 2001/2001                  192.168.2.234    D          5060    
UNKNOWN
>> Cached RT
>> 
>> 	It is arbitrary which peers will say OK and which will say UNKNOWN
and
>> it changes over time.
> 
>> This used to work fine until 1.4.21
>> so why did it break and why wasn't it fixed on 1.4.23?  This only
>> happens when using realtime peers, static peers will always show the
>> proper status. 
> 
> It might be related to this issue (thread in German)
>
http://www.mail-archive.com/gemeinschaft-users@lists.amooma.de/msg00083.html
>
http://www.mail-archive.com/gemeinschaft-users@lists.amooma.de/msg00152.html
>
http://www.mail-archive.com/gemeinschaft-users@lists.amooma.de/msg00153.html
> etc.
> 
> Several people, including me, have confirmed that since Asterisk
> 1.4.22 you get hundreds (probably depends on the number of SIP
> peers/users) of SQL queries per second and the CLI is being flooded
> with
> ---cut---
> [Oct  8 12:22:56] NOTICE[2487]: chan_sip.c:16223 sip_poke_noanswer:
Peer
> '8280' is now UNREACHABLE!  Last qualify: 0
> ---cut---
> leading to 100 % CPU usage.
> 
> 1.4.21.2 didn't have the problem.

======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0004362 [patch] new config option 'rtautoreg'
related to          0012921 Asterisk 1.4.21 breaks realtime sip on ...
related to          0015950 Options flood to sip user, after adding...
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---------------------------------------------------------------------- 
 (0111319) lmadsen (administrator) - 2009-09-24 09:10
 https://issues.asterisk.org/view.php?id=14309#c111319 
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Technically he tested the patch in this issue, but opened the duplicate
issue 15950. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-09-24 09:10 lmadsen        Note Added: 0111319                          
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