[asterisk-bugs] [Asterisk 0013287]: 200 OK retransmitted even when first SIP OK is ACKed

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13287 
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Reported By:                pj
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13287
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 136787 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-08-11 15:20 CDT
Last Modified:              2008-08-22 06:36 CDT
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Summary:                    200 OK retransmitted even when first SIP OK is ACKed
Description: 
I looked at sip callflow in asterisk and seems, that asterisk retransmits
SIP/OK, even in case that first SIP/OK was correctly ACKed by other party.
If you look at attached call graph analysis, you can see it,
also, asterisk delayed initial INVITE about 200ms, before it forwards to
another party, why?

I must also notice, that my asterik server was 100% idle, only one call
was processed, when this dump was taken. Call was over LAN connection.

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Relationships       ID      Summary
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related to          0010332 SIP - ACK not processed, 200 OK retrans...
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 (0091639) pj (reporter) - 2008-08-22 06:36
 http://bugs.digium.com/view.php?id=13287#c91639 
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after analyzing lot of packet captures, I can confirm, that '200 OK'
retransmissions are caused by "could NOT get the channel lock" errors, as
reported in http://bugs.digium.com/view.php?id=13115 

Issue History 
Date Modified    Username       Field                    Change               
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2008-08-22 06:36 pj             Note Added: 0091639                          
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