[asterisk-users] 1.6.0.10: core restart on ReceiveFax()

[Miguel Molina]

sean darcy escribió:
> For our internal fax machines, I'm checking if the faxes are going to 
> branch offices. If they are, I want to capture and email them to the 
> branches. I've set up extension 8447 to test this.
>
> A fax machines is connected via an SPA 2102 on 173. Any calls from 173 
> are sent to:
>
> [outbound-fax]
> exten => 8447,1,Answer()
> exten => 8447,n,GoSub(Capture-Fax,s,1)
>
> exten =>_NXXNXXXXXX,1,Answer()
> exten =>_NXXNXXXXXX,n,GoSub(DialOut-PSTN,s,1(1${EXTEN}))
>
> exten =>_1NXXNXXXXXX,1,Answer()
> exten =>_1NXXNXXXXXX,n,GoSub(DialOut-PSTN,s,1(${EXTEN}))
>
> exten =>_91NXXNXXXXXX,1,Answer()
> exten =>_91NXXNXXXXXX,n,GoSub(DialOut-PSTN,s,1(${EXTEN:1}))
>
> Actual outbound faxes work correctly. That is, a call from 173 to an 
> outside fax machine works.
>
> The test faxes go to:
>
> [Capture-Fax]
> exten => 
> s,1,Set(FAXFILE=/var/spool/asterisk/fax/${STRFTIME(${EPOCH},,%Y%m%d)}_${STRFTIME(${EPOCH},,%H%M)})
> exten => s,n,ReceiveFAX(${FAXFILE}.tif)  ;; 1.6 use ReceiveFAX
> exten => s,n,Hangup()
>
> When the test fax gets to ReceiveFax() asterisk restarts. Any calls at 
> the time are lost.
>
>      -- Executing [8447 at outbound-fax:1] Answer("SIP/173-081d3780", "") 
> in new stack
>      -- Executing [8447 at outbound-fax:2] Gosub("SIP/173-081d3780", 
> "Capture-Fax,s,1") in new stack
>      -- Executing [s at Capture-Fax:1] Set("SIP/173-081d3780", 
> "FAXFILE=/var/spool/asterisk/fax/20090612_1710") in new stack
>      -- Executing [s at Capture-Fax:2] ReceiveFAX("SIP/173-081d3780", 
> "/var/spool/asterisk/fax/20090612_1710.tif") in new stack
>
> /var/spool/asterisk/fax exists, permissions 777:
>
> ls -l /var/spool/asterisk
> total 32
> ..............
> drwxrwxrwx 2 root root 4096 2009-05-03 14:21 fax
> ...........
>
>
> I've set debug and verbose to 20, but no further info.
>
> What am I missing? Anybody have something like this working this working?
>
> sean
>
>
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Two thoughts on this:

1. On Exten 8447, why are you using a GoSub instead of a simple Goto? 
(Shouldn't pose a problem, just curious)
2. I wouldn't recommend the use of date-time only to form the filename 
of the received fax. This was the key issue that was killing asterisk in 
my case, when I switched to date-time + uniqueid for example, everything 
went fine. That's because it looks like RxFax() or in this case 
ReceiveFax() doesn't play well with duplicate (open) filenames, which I 
don't know if they occur in your case. It definitely can happen if you 
have programmed it and have the capacity to receive simultaneous faxes 
at a time. After the change my machine is rock stable, receiving and 
sending hundreds of faxes a day with no restarts.

Hope this helps.

Cheers,

-- 
Ing. Miguel Molina
Grupo de Tecnología
Millenium Phone Center