[asterisk-bugs] [Asterisk 0011083]: [patch] Empty voicemail message file causes call into voicemail to disconnect

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11083 
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Reported By:                dtyoo
Assigned To:                Corydon76
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Project:                    Asterisk
Issue ID:                   11083
Category:                   Applications/app_voicemail
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           1.4.13  
SVN Branch (only for SVN checkouts, not tarball releases): N/A  
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             10-24-2007 20:44 CDT
Last Modified:              10-26-2007 09:14 CDT
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Summary:                    [patch] Empty voicemail message file causes call
into voicemail to disconnect
Description: 
After upgrading from 1.4.9 to 1.4.13 we are having the following problem
with voicemail.  We sometimes get voicemail messages left in mailboxes
where the wav / data file is 44 bytes long.  The file basically has a
header but no data.  Under 1.4.13 calls into voicemail will be disconnected
after listening to such a message.  1.4.9 did not have this issue.

In case you are curious, these 44 byte messages are being left despite
minmessage being set to 3 in the general section of voicemail.conf.  These
messages are accompanied by a console message "app.c: No audio available on
SIP/IP ADDRESS-b50d7b38??"

Nothing special in the console / log file.  Looks the same as when a
caller hangs up normally even though in this case they are being
disconnected.
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---------------------------------------------------------------------- 
 Corydon76 - 10-26-07 09:14  
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The issue, specifically, is that RTP is not flowing to the voicemail server
for whatever reason, but recording was previously using the amount of time
which has passed as the indication of the duration, rather than using the
number of samples which have been recorded in the file.  Hence, the call
may have lasted 30 seconds, but since you received no audio data in that
time, the recorded file contained no audio.  This is why the minmessage
setting failed to work correctly. 

Issue History 
Date Modified   Username       Field                    Change               
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10-26-07 09:14  Corydon76      Note Added: 0072546                          
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