[Asterisk-Users] Asterisk hangs on 1.2.1

[Mark Johnson]

Mark Johnson wrote:
> Anyone have any idea what's causing this or how to debug it?  I'm 
> pretty sure the root cause is with chan_sccp.so, but not sure how to 
> prove it.
>
> I recently upgraded from CVS-head to 1.2.1 and the chan_sccp from 
> 12-17-2005.  Now, once or twice a week, I get this on the console:
>
> Jan 31 10:39:08 WARNING[10586]: channel.c:784 channel_find_locked: 
> Avoided deadlock for '0xbf1013e0', 10 retries!
>
> Once this happens, all of my sccp phones drop offline and attempt to 
> register.  I get no sccp messages on the console.  There's really 
> nothing on the console to indicate any sort of problem.  If I try to 
> do an "unload chan_sccp.so" and then load it back, all of my SIP 
> phones lose their registrations, none of my Zap channels work and I 
> have to kill Asterisk and restart it.
>
> Is this an Asterisk problem or an SCCP problem?  Help!!
>
>
It did it to me again.  I enabled full logging and here's what I get.  
All the 7910's drop off line and try to reregister.  All SCCP messages 
on the CLI stop.  Anytime I try a "show channels" I get the Avoided 
deadlock message.  Here's what the logfile shows.  Any ideas?  And is 
there a way to fix the deadlock without restarting Asterisk?

Feb  1 09:10:33 WARNING[5327]: channel.c:784 channel_find_locked: 
Avoided deadlock for '0xbf002d10', 10 retries!

Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:08 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:09 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:09 DEBUG[6606] channel.c: Avoiding deadlock for 
'SCCP/204-00000205'
Feb  1 09:17:09 WARNING[6606] channel.c: Avoided deadlock for 
'0xbf002d10', 10 retries!