[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:                     assigned
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:              2008-10-08 08:48 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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 (0093357) murf (administrator) - 2008-10-08 08:48
 http://bugs.digium.com/view.php?id=13409#c93357 
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deferer--

If you are seeing a duplicate CDR issue, it would be better to file it as
a separate bug report, as this one really was mainly about a fire-hose
level of
memory leak in Asterisk, mainly (as it turned out) caused by zombie
channels hanging around when they should have been freed up.

I think we have the "Bloating Zombie Channel Death" problem cleared up,
but if there's a regression, especially with CDR's, please open up a new
bug,
categorize it in the CDR/general or whatever category, and assign it to
me,
and I'll look at it. Be specific about the sequence of events necessary
to
reproduce it, and I'll be happy to have a look at it!

But, if this is indeed a memory leak sort of problem, re-open it again,
and we'll get back on it. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-10-08 08:48 murf           Note Added: 0093357                          
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