[Info-vax] Device with owner that doesn't exist.

[Fred. Zwarts]

Op 23.okt..2019 om 14:34 schreef Jan-Erik Söderholm:
> Den 2019-10-23 kl. 14:16, skrev Simon Clubley:
>> On 2019-10-23, Volker Halle <volker_halle at hotmail.com> wrote:
>>> The OpenVMS Freeware V8 tool CLRREF may help as well:
>>>
>>> https://www.digiater.nl/openvms/freeware/v80/clrref/
>>>
>>> Use at your own risk.
>>>
>>
>> On the plus side however, if it goes wrong, Jan-Erik will get the
>> reboot he needs to clear the reference in a supported way. :-)
>>
>> Seriously however, it's probably indeed best to make sure the system
>> is idle and not in the middle of doing something important before
>> running this tool just in case.
>>
>> Simon.
>>
> 
> I'm looking at it right now and I'll try to force this
> hanging device scenario on our test box, of course. But
> When it is really needed, is when work places in the
> factory stands still and really need to get going.
> 
> And it must be possible to use it in the COM files that
> the users can submit from there menu system.
> 
> Today, I simply change the appliation startup COM file
> and assignes another unused TNA device number and let the
> hanging one die by its onw. Actually, the device in my first
> post above (TNA8883:) is gone now, a couple of hours later.
> I changed the COM file to use TNA8884: instead so that they
> get the printer online again and then left it like that.
> And now TNA8883: is simply gone...
> 
> The TNA device points to an IP and port number of a label
> pinter (Zebra). Sometimes when the printouts hangs, the users
> simply close their session and that is where the user process
> goes away and the TNA device gets hang, I guess.
> 
> I also have another idea where a pool of TNA numbers are used
> in a round-robbin fashion. Then we can let any hanging devices
> just go away by their own.
> 
> But I'll look at this first and we'll see...
> 
> 

Maybe the device was being deleted, but was waiting for an IO operation 
to complete. It might have been that after a TCP time-out, or when the 
printer disconnected, this IO completed and the device was deleted.