603 call declined

oh thanks but I asked the resource means no user…

I think the log says no receiver on dialplan. is it right?..

but my situation is…

  1. caller(5000) to receiver(5001) when no other calls.
    it works well no decline

  2. caller(5000) to receiver(5001) when many other calls or registration.
    2 works well but 1 make decline…

but i don’t think lack of memory or cpu because my server htop is this…

I use asterisk realtime mysql
is it possible the delay time of asterisk searching receiver on mysql make this situation?