[Paraview] Paraview Web on Ubuntu with gpu but without screen

[Daniel Zuidinga]

Thanks for your long answer Scott.

seemed that I had a wrong x server configuration. I setup a new user and 
now it works. I think you can't use x or the paraview web stuff as a 
root user.

Am 07.09.2016 um 18:05 schrieb Scott Wittenburg:
> Hi Daniel,
>
>    I have several thoughts after reading your email, though I'm not 
> sure how helpful they may be.  First, the error you reported doesn't 
> sound (to me) like the typical error you might see when you do not 
> have your graphics environment configured properly.  I assume that 
> even without a display you are setting up an X server and making sure 
> to set the DISPLAY environment variable before running the script?  
> Even though you are not using EC2, some of the information at the link 
> below could pertain to your situation:
>
> http://kitware.github.io/paraviewweb/docs/guides/graphics_on_ec2_g2.html
>
> hopefully that gets you pointed in the right direction.
>
>    Another thing to note: I don't believe that the pv_web_visualizer 
> python script is included in ParaView anymore, though I don't recall 
> exactly when that moved (it appears you are using version 5 or 
> above).  Now the web side of ParaView has moved into various other 
> github repositories:
>
> Core Libraries: https://github.com/Kitware/paraviewweb
> Web Visualizer Application: https://github.com/Kitware/visualizer
>
>    These days you will find the equivalent of the pv_web_visualizer.py 
> script in the above repo (located under "server/pvw-visualizer.py").
>
>    However, if you do indeed have the python script in the location 
> stated in your email, then I'm not sure what could be causing the 
> apparent json error you mentioned.  Normally though, one might have 
> provided some arguments to that python script in the use case it seems 
> you are targeting, although perhaps you just left them out when 
> composing your email.  For example, if you did not provide a 
> "--content" argument, specifying the path to the static content you 
> are serving, are you managing that another way?
>
>    Feel free to post more information such as the complete command 
> line you are invoking, how you are connecting from your browser 
> (assuming you get that far), or perhaps more error output if there is any.
>
>    Hope this helps.
>
> Cheers,
> Scott
>
>
>
> On Wed, Sep 7, 2016 at 6:17 AM, Daniel Zuidinga <info at seoaachen.de 
> <mailto:info at seoaachen.de>> wrote:
>
>     Hi,
>
>     I try to get pvweb to run on my server without monitor (but intel
>     graphics card). Seems not as easy as I thought. I run e.g. the
>     visualizer:
>
>     /root/salome_meca/V2016/prerequisites/Paraview-v501_EDF/bin/pvpython
>     /root/salome_meca/V2016/prerequisites/Paraview-v501_EDF/lib/paraview-5.0/site-packages/paraview/web/pv_web_visualizer.py
>
>     and I get the error:
>
>     terminate called after throwing an instance of 'Json::LogicError'
>       what():  in Json::Value::find(key, end, found): requires
>     objectValue or nullValue
>
>
>     any ideas?
>
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