Replying to myself. :)
I just noticed the deadlock message still displayed on the console at the end 
of a normal call, so the the deadlock message is not related to the early CANCEL

----- Original Message ----
From: Douglas Garstang <[EMAIL PROTECTED]>
To: [email protected]
Sent: Tuesday, January 8, 2008 5:31:12 PM
Subject: [asterisk-users] Help! channel_find_deadlocked: Avoided initial 
deadlock for ...


Hope someone can help.

I have a situation where asterisk is sending a SIP CANCEL message before the 
Dial() timeout has hit. It doesn't always do it.

Normally, we send an INVITE to the ITSP. They respond with a 100 Trying, then a 
180 Ringing, or 183 Session Progress. It seems to be at this point that 
Asterisk starts the dial timer. Normally, when no more replies have been 
received by the dial timeout, Asterisk sends a CANCEL message. That's all fine, 
and when this happens, this is what appears on the console:

    -- Called [EMAIL PROTECTED]
    -- SIP/teleglobe-09879188 is making progress passing it to 
SIP/teleglobe-09876568
    -- Nobody picked up in 40000 ms
    -- Executing
 PlayTones("SIP/teleglobe-09876568", "congestion") in new stack

However, when asterisk sends the CANCEL earlier then this, this is what appears 
on the console:

    -- SIP/teleglobe-09879188 is making progress passing it to 
SIP/teleglobe-09876568
  == Spawn extension (default, callback, 7) exited non-zero on 
'SIP/teleglobe-09876568'
Jan  9 01:16:34 WARNING[5719]: channel.c:781 channel_find_locked: Avoided 
initial deadlock for '0x97f24d8', 10 retries!

Does anyone know what the deadlock message is all about? It is ocurring quite 
frequently.
This is Asterisk 1.2.14.

Thanks,
Doug







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