[asterisk-bugs] [Asterisk 0016721]: after a few minutes it takes down the server

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=16721 
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Reported By:                falves11
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16721
Category:                   Channels/chan_sip/Interoperability
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.1 
SVN Revision (number only!): 243695 
Request Review:              
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Date Submitted:             2010-01-27 18:03 CST
Last Modified:              2010-01-27 18:03 CST
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Summary:                    after a few minutes it takes down the server
Description: 
Versions 1.6.X has a problem with UDP ports. I use SIP timers in my
sip.conf, so I imagine it its related. After a few minutes of intense
traffic, this linux command ("lsof -i | wc -l") shoots to 30.000+ and in
fact kills the machine, because the Kernel spends most of the time in a
single function, sock_poll. This is what the Parallels engineers have
found:
"this function finds a free socket that might be used for the data
transfer. Because your node have about 5000 already used sockets finding
free socket might take relatively big time. As far as I understand if
system is unable to find the free socket fast enough it just drops UDP
packet because there is no delivery guarantee for this protocol."
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Issue History 
Date Modified    Username       Field                    Change               
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2010-01-27 18:03 falves11       New Issue                                    
2010-01-27 18:03 falves11       Asterisk Version          => SVN             
2010-01-27 18:03 falves11       Regression                => No              
2010-01-27 18:03 falves11       SVN Branch (only for SVN checkouts, not tarball
releases) => 1.6.1           
2010-01-27 18:03 falves11       SVN Revision (number only!) => 243695          
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