[squeak-dev] OsProcess - UnixProcess Hangs - VPN related
JohnReed Maffeo
aldeveron at graffiti.net
Mon Feb 24 16:35:14 UTC 2014
> ----- Original Message -----
> From: David T. Lewis
> Sent: 02/19/14 07:54 PM
> To: The general-purpose Squeak developers list
> Subject: Re: [squeak-dev] OsProcess - UnixProcess Hangs - VPN related
>
> On Wed, Feb 19, 2014 at 08:29:20PM -0500, JohnReed Maffeo wrote:
> > I am currently working in an environment where I have to access external resources using VPN.
> >
> > I was working in Squeak (4.4-12327) last night, worked with VPN enabled today, closed it launched Squeak and now when I execute "osp := ExternalUnixOSProcess command: cmdLine" and instpect osp, it is undefined.
> >
> > When I execute "UnixProcess testRunCommand" I get the warning "process accessor module not available"
> >
>
> This is the error message that you will see if you run your image on a VM
> that does not have the OSProcess plugin. You can confirm this by evaluating:
>
> OSProcess accessor canAccessSystem ==> true
The image that I am running in has OSProcess installed and working for several months. The code that fails only fails in conjunction with my use of Cisco VPN software.
>
>
> > I don't have a complete test case defined of the exact repeatable steps but, I think the issue resolves itself
> > when I reboot.
> >
> > Is there a way for me to get UnixProcess to wake up? I tried to initialize ??it, but that did not help.
> >
>
> Perhaps you are running your image on a different VM, or on a different operating
> system? If you run it on a VM with the OSProcess plugin, I would expect it to return
> to normal.
>
> But I do not understand the part about the issue resolving itself when you reboot
> the system. So I think maybe I am misunderstanding the problem.
If I reboot my computer, launch Squeak and run my program, OSProcess works as expected. The problem is associated with launching VPN while I have an image open. I have been spending my development time trying to get my application working well enough so that I can spend some time digging into the root cause of this particular issue. That happened last night and I spent some time poking around and discovered that "HTTPSocket initialize" seems to resolve the issue, if so, this is not an OSProcess issue.
I will have to do more testing to verify the specific failure and recovery scenario, but I think I am on the right track. Now that I have a working application, I can focus on Socket and see if I can figure out what is happening.
>
> Dave
jrm
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