[Asterisk-Users] Re: Avoiding IAX destroy deadlock

[dustin at cnw.com]

> On one of my 3 * servers I get this after 2 or 3 IAX2 calls 
> 
> Apr 22 15:54:39 NOTICE[1150495040]: chan_iax2.c:1271 iax2_destroy: 
> Avoiding IAX
> destroy deadlock
> 
> And as if that wasn't enough I get a never ending stream of this error 
> flying off the top of the screen. At which point I can no longer make 
> any calls into or out of the box. Any commands issued at the CLI prompt 
> are ignored so I have to do a service asterisk restart now to get it 
> back into service again.
> 
> Ideas?

I am seeing a very similar thing. Ideas?

Sep  8 12:17:46 NOTICE[-1137718352]: chan_iax2.c:1271 iax2_destroy: 
Avoiding IAX destroy deadlock

Fedora Core 1, Asterisk CVS-03/30/04-16:59:11. Asterisk is stuck in a 
select call. Here is a backtrace:

(gdb) bt
#0  0x0048dc32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x00579b21 in ___newselect_nocancel () from /lib/tls/libc.so.6
#2  0x08087384 in main (argc=0, argv=0x0) at channel.h:798

I'm not experienced with multi-threaded debugging, so I don't know what
any of the other threads were doing. I'm assuming that one of them was
responsible for the iax2_destroy call, but I didn't know how to get a
backtrace on the thread. I had to restart Asterisk so that phone calls
could go through.

# ps -C asterisk
  PID TTY          TIME CMD
 8356 ?        00:10:26 asterisk

# strace -p 8356
Process 8356 attached - interrupt to quit
select(0, NULL, NULL, NULL, NULL

# uname -a
Linux server 2.4.22-1.2115.nptl #1 Wed Oct 29 15:42:51 EST 2003 i686 i686 
i386 GNU/Linux

# grep -c "destroy deadlock" /var/log/asterisk/messages 
848934

# ls -l /var/log/asterisk/messages 
-rw-r--r--  1 root root 57236862 Sep  8 12:58 /var/log/asterisk/messages

Other log entries from the 7th (surrounding the start of these 
error messages) There are no other entries from the 6th or 8th.

Sep  7 14:06:46 WARNING[-1232168016]: Timeout, but no rule 't' in context 
'from-sip'
Sep  7 14:07:17 WARNING[-1232168016]: Timeout, but no rule 't' in context 
'from-sip'
Sep  7 15:03:54 WARNING[-1232168016]: Unable to read password
Sep  7 17:53:30 WARNING[-1232168016]: Invalid extension, but no rule 'i' 
in context 'from-sip'
Sep  7 17:53:57 WARNING[-1232168016]: Timeout, but no rule 't' in context 
'from-sip'

Dustin