XDMF reader fails to read attribute data when running in parallel

Reproducing:

1. Run paraview with more than one pvserver.
2. Open the given xdmf file using the 'XDMF Reader'.
3. Click 'Apply'.

It works fine with a single pvserver instance and using just the client.

test.hdf5 test.xdmf

ERROR: In [test.hdf5](/uploads/11f56ec6a8e82d71f7072cc432199581/test.hdf5)

[test.xdmf](/uploads/80a4a7393ecff70a877e0cb716035f95/test.xdmf)5.6.1-osmesa_intel-18.0.5_openmpi-2.1.2/superbuild/paraview/src/VTK/IO/Xdmf2/vtkXdmfHeavyData.cxx, line 1214
vtkXdmfReader (0x36f3640): Failed to read attribute data