[Asterisk-Users] chan_zap graceful failure

[Andrew Kohlsmith]

On April 29, 2005 11:22 am, Jeb Campbell wrote:
> As soon as power came back, the server started.  However when it loaded
> wcfxs, port 3 on the card failed the tests (I assume from the module not
> being unloaded before power off).  Because this one port failed the
> test, chan_zap failed to load and asterisk will not start.

It has nothing to do with not being unloaded; I've seen the wctdm driver fail 
to detect modules correctly.  Run it again and it works just fine.  Some kind 
of minor tweak is in order, I believe.

> While the unclean shutdown can be controlled in the future, I have had
> ports go bad and when they do asterisk will not start until the
> offending lines are removed from zapata.conf.  This is not a very
> resilient solution (especially if you are not on site).  I would much
> prefer for asterisk to keep running with what it has got.

As an interim solution, your asterisk starup script should try to unload any 
modules and reload them upon asterisk failure...  preferably in a loop:

while(1) {
 unload modules
 sleep 1
 load modules
 start asterisk
 sleep 5
 }

I imagine at this point in time your startup script either does not loop, or 
it doesn't try to unload/load the modules inside the loop.

 -A.