[asterisk-bugs] [Asterisk 0012091]: Asterisk sends 491 Pending for a new INVITE

[noreply at bugs.digium.com]

The following issue has been RESOLVED. 
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http://bugs.digium.com/view.php?id=12091 
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Reported By:                atrash
Assigned To:                oej
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Project:                    Asterisk
Issue ID:                   12091
Category:                   Channels/chan_sip/General
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     resolved
Asterisk Version:           1.4.17 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
Resolution:                 no change required
Fixed in Version:           
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Date Submitted:             02-27-2008 15:12 CST
Last Modified:              07-03-2008 11:47 CDT
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Summary:                    Asterisk sends 491 Pending for a new INVITE
Description: 
Please help!!!

AsteriskNOW v 1.0.1 is setup with multiple phones running SIP.  

The server itself is communicating with our provider in SIP as well, and
incoming/outgoing works great....

Except that outgoing calls get dropped in random time intervals ranging
from between less than a minute to over 15 minutes.

Each time they get dropped, the SIP Debugging shows the same thing...
Here's a quick overview, with the detailed sip debugging attached.


So here's what happened for the last call:
1. The provider sends an INVITE:
INVITE sip:6787721321 at 10.212.7.226 SIP/2.0
CSeq: 778024721 INVITE

2. Asterisk responds with a Trying:
SIP/2.0 100 Trying 
CSeq: 778024721 INVITE

3. Asterisk completes and sends the OK:
SIP/2.0 200 OK
CSeq: 778024721 INVITE

4. Provider sends another INVITE with a different CSeq:
INVITE sip:6787721321 at 10.212.7.226 SIP/2.0
CSeq: 778024722 INVITE

5. Asterisk thinks that this new invite is pending, and responds with:
SIP/2.0 491 Request Pending
CSeq: 778024722 INVITE

6. The provider ACKS this pending:
ACK sip:6787721321 at 10.212.7.226 SIP/2.0
CSeq: 778024722 ACK

7. The provider doesn't receive a completion, and responds with a BYE (
terminating the call :( ):
BYE sip:6787721321 at 10.212.7.226 SIP/2.0


Now, I'm left wondering why it replies with a 491 when the invite is not
still in processing....


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---------------------------------------------------------------------- 
 oej - 07-03-08 11:47  
---------------------------------------------------------------------- 
If you still think there's a bug here, feel free to re-open this bug
report. If you want to discuss, please find us on #asterisk-bugs on IRC or
on asterisk-dev.

Thank you for reporting a possible bug. Good luck with fixing the issues
with your device. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
07-03-08 11:47  oej            Status                   ready for testing =>
resolved
07-03-08 11:47  oej            Resolution               open => no change
required
07-03-08 11:47  oej            Assigned To               => oej             
07-03-08 11:47  oej            Note Added: 0089693                          
======================================================================