[asterisk-bugs] [Asterisk 0013409]: [patch] Huge memory leak because memory of channel cdr struct is never returned

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13409 
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Reported By:                tomaso
Assigned To:                murf
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Project:                    Asterisk
Issue ID:                   13409
Category:                   Core/Channels
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     feedback
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.0 
SVN Revision (number only!): 137818 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-09-01 09:48 CDT
Last Modified:              2008-09-09 10:44 CDT
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Summary:                    [patch] Huge memory leak because memory of channel
cdr struct is never returned
Description: 
After two days of stress testing by making lots of calls across sip and
dahdi channels the asterisk process memory reached dizzy values: VSZ=3,2GB,
RSS=1,6GB before asterisk stucked completely (even the RAM of our server
(2GB) is finite ;-) ).

Actually this problem is not a question of load, but appears for each
single call.

Using valgrind the reason for that was quickly found: The memory of the
channel cdr struct (chan->cdr) is never returned, not for sip, not for
dahdi channels, when a channel is cleared.

Reproduce:
a.f.a.p. default configuration (modules.conf, etc.)
Make lots of calls and see ps's VSZ and RSS values.

Interested in a patch ? Or is someone revise this anyway?

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Relationships       ID      Summary
----------------------------------------------------------------------
related to          0013235 Memory leak in Asterisk 1.4 and Trunk
related to          0013444 After update from 140415 to 141991 get ...
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---------------------------------------------------------------------- 
 (0092254) murf (administrator) - 2008-09-09 10:44
 http://bugs.digium.com/view.php?id=13409#c92254 
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falves11-- yes, I just checked. Your asterisk shows uptime:
2 days, 19 hours, 38 minutes, 14 seconds

and since then, we now show:

root 3473 16.0  7.7 618596 318772 ?  Sl Sep04 1200:25 /usr/sbin/asterisk
-f -vg -c

which is about 200K more memory since yesterday. This is a lot less
drastic a leak
than previously, but still not good. sip show channels shows almost 80
channels. (but none are in the bye state).

Later tonight, when the call volume is less, we will do some experiments,
and find the leak, unless tomaso can find it today. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-09-09 10:44 murf           Note Added: 0092254                          
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