asterisk users - Jul 2010 - Subscribe Problem - Zombie Channel

Hi List,

Asterisk 1.4.22 built by root @ carl on a i686
Purely SIP
Linksys SPA962 with 932 sidecar and also Cisco SPA508 / 525G with Sidecars

Have an issue with this happening with a number of my customers.

Customer hits the ringing BLF on the sidecar to pickup the call incoming on
another handset.

Not always but enough to cause me a problem it leaves a channel open.

At the moment, this is the output from core show channels on one of the
affected sites:

core show channels
Channel              Location             State   Application(Data)

SIP/102--08e1 *8 at from-inside Down    (None)
SIP/102--08d6 *8 at from-inside Ring    (None)
SIP/102--08d7 *8 at from-inside Ring    (None)
3 active channels
0 active calls


I can't get rid of them, if I:
soft hangup SIP/102--08e149c0
Requested Hangup on channel 'SIP/102--08e149c0'

and thats all that happens.

core show channels
Channel              Location             State   Application(Data)

SIP/102--08e1 *8 at from-inside Down    (None)
SIP/102--08d6 *8 at from-inside Ring    (None)
SIP/102--08d7 *8 at from-inside Ring    (None)
3 active channels
0 active calls

The only way to free them up is to force a restart.

restart now

Any clues on how I can debug this and try to sort it or even if anyone has
come across this.

Many thanks in advance.

Brian
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dotnetdub schrieb:
> Hi List,
<snip>
> core show channels
> Channel              Location             State   Application(Data)   
>           
> SIP/102--08e1 *8 at from-inside Down    (None)                        
> SIP/102--08d6 *8 at from-inside Ring    (None)                        
> SIP/102--08d7 *8 at from-inside Ring    (None)                        
> 3 active channels
> 0 active calls
>
> The only way to free them up is to force a restart.
>
> restart now
>
> Any clues on how I can debug this and try to sort it or even if anyone 
> has come across this.
>
> Many thanks in advance.
>
> Brian
>
>
hello,

you should recompile asterisk with DEBUG CHANNEL LOCKS flag and i think 
you will see some locks when this happens with core show locks.
how do you make the pickup? do you use an extension *8 for this, or just 
the feature for pickup in features conf?

best regards

steve