[Paraview] ParaViewWeb Visualizer black screen

[louise.davies at stfc.ac.uk]

Hello,

I have been trying to set up a ParaViewWeb server on my CentOS 6 machine to run Visualizer. I have gotten to a point where the UI loads correctly but remote rendering only displays a black screen. Not even the axes in the bottom left are displayed. However, if I switch to local rendering mode it works as normal. There are no errors at all in the Apache logs and the session log starts fine but after the twisted server startup and the lines filled with plus signs, I get the lines:

2017-10-02 11:14:48+0100 [_GenericHTTPChannelProtocol,0,127.0.0.1] Client has reconnected, cancelling reaper
2017-10-02 11:14:48+0100 [_GenericHTTPChannelProtocol,0,127.0.0.1] on_connect: connection count = 1
2017-10-02 11:14:48+0100 [-] Property BeginValueCapture has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property CaptureValuesFloat has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property CaptureZBuffer has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property EndValueCapture has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property Send to OpenVR has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property StartCaptureLuminance has no GetData() method, skipping
2017-10-02 11:14:48+0100 [-] Property StopCaptureLuminance has no GetData() method, skipping
Warning: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/VTK/Rendering/OpenGL2/vtkXOpenGLRenderWindow.cxx, line 1093
vtkXOpenGLRenderWindow (0x3e184d0): warning window did not resize in the allotted time

Since it works with local rendering and not remote rendering I feel as though it must be a problem with OpenGL, but running glxinfo shows that the user running the launcher has access to direct rendering.

Any suggestions on what could possibly be going wrong would be greatly appreciated.

Kind Regards,

Louise
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