[Asterisk-Users] Possible Bug in Asterisk 1.2.0 with Queues and MOH

[Waldo Rubinstein]

I think I discovered a bug.

I have a dual Xeon machine running * 1.2.0

I have a queue defined to play the default music on hold class, which  
simply plays an mp3 file.

When a call comes into the queue (note that there are no agents  
logged in, but I have joinempty=yes and leavewhenempty=no in  
queues.conf) * answers, puts the call in the queue and the caller is  
holding "listening" to MOH. What's interesting is that there is no  
MOH playing, or at least nothing is heard.

When a second call comes in, the new caller does in fact hear music  
on hold. When the first caller hangs up while the second caller is  
still waiting, the MOH the second caller was listening to stops  
playing until another call comes in and is put into the queue.

It seems that the music on hold is only heard when there are two or  
more callers waiting in the queue.

Has anyone else experienced this?

Also, while testing this, I was running vmstat 1 on a separate window  
and it showed me some interesting things about CPU utilization.

When there are no calls, CPU is 100% idle. When the first call comes  
in, CPU utilization drops to 50% idle, which, in my case, I think one  
of the CPUs is 100% busy and the other is 100% idle. When additional  
calls come in, it only drops the idle % by 1-2 percent per call. When  
the calls hang up, CPU idle goes back to 100%. At first, I thought it  
could be mpg123 taking all the CPU but running top shows a single  
(among many) asterisk process using 99.9% of one of the CPUs. This  
may be another bug.

Any comments/ideas?

Thanks,
Waldo