[Bf-viewport] 2.77 OGL requirement seems to break renderfarm job submission (possible?)

[Mike Erwin]

Hi Adam,
Your interesting not about manual runs working *is* interesting. I'm not
very familiar with Windows servers so bear with me...

Do your render nodes have GPUs? The command string seems to suggest that.
If so are they just used for CUDA/OpenCL and not OpenGL?

In normal operation are the render nodes GUI-less and have no need for
OpenGL or other display?

During the successful manual run, something changes. Is simply "being
there" enough to get it working? Meaning there is a display to draw to, a
console to read from and write to, etc.

Mike Erwin
musician, naturalist, pixel pusher, hacker extraordinaire

On Fri, May 13, 2016 at 1:35 PM, Adam Glick <adam at renderstorm.com> wrote:

> Greetings from www.renderstorm.com !
>
> This is *not* directly related to the viewport, but more related (*we
> think*) to the new requirement in 2.77a for hardware-accelerated OGL and
> any potential effect on spawning network rendering jobs in Windows.
>
> Our render farm queue manager executes blender.exe -b at the command line
> using Windows "createProcess()" function.
>
> *Here's what we're passing to the rendernodes :*
>
> CreateProcessAsUser( token, NULL, commandToExecute, lpSA, NULL,
> inheritHandles, CREATE_NEW_CONSOLE, NULL, NULL, &si, pi)
>
> *commandToExecute typically looks something like this:*
>
> ["C:\Program Files\Blender Foundation\Blender\blender.exe" -b
> "\\DISKSTATION1\farm\SquidNetRenderFolder\sync\521450\87E82C8694\project\BMW1M
> Mike Pangpu.blend" -x 1 -s 4 -e 4 -j 1 -F EXR --python-text
> renderstorm_blender_0107.py -E CYCLES  -P "C:\Program Files
> (x86)\SquidNetSoftware\SquidNet\plugins\\blender\squidnet_blender_gpu_render.py"
> -o
> \\Diskstation1\FusionIO_DS1\ProjectData\jobs\521450\6974A4\1AE094A25B\slices\slice-4\broken_277_agtest
> -a -y]
>
>
> *This works great for 2.76b and previous builds.  But we get the following
> errors back from all Blender 2.77 network jobs now  :*
>
> "...
> Fatal Python error: Py_Initialize: can't initialize sys standard streams
>
> OSError: [WinError 6] The handle is invalid
> ...
> "
>
> ***Interesting note**  We can paste our full blender command string into
> the Windows CMD shell on one of the rendernodes and manually run the job in
> 2.77a with no errors at all! *
>
>
> Maybe there's something else in 2.77 that's breaking our process, but our
> best guess is the new OGL implementation...
>
> Does anybody have any suggestions on how we might troubleshoot/remedy this
> issue?
>
> Thanks in Advance!!
>
> Adam
>
>
> --
> Adam Glick,
> VP, Pipeline Technology
> 760--818-3668 (cell)
> www.RenderStorm.com
>
> _______________________________________________
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> Bf-viewport at blender.org
> https://lists.blender.org/mailman/listinfo/bf-viewport
>
>
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