DataOut::write_vtu_in_parallel: missing closing xml elements

[tamiko]

I am not sure why this happens but I encounter missing closing xml elements in the generated vtu files with DataOut::write_vtu_in_parallel:

(‼) maier@whistler scratch/20220522-cylinder % tail -3 cylinder-38M-solution_000006.vtu
 </Piece>
 </UnstructuredGrid>
</VTKFile>
(‼) maier@whistler scratch/20220522-cylinder % tail -3 cylinder-38M-solution_000007.vtu
    </DataArray>
  </PointData>
 </Piece>
(‼) maier@whistler scratch/20220522-cylinder % ls -la cylinder-38M-solution_00000[67].vtu
-rw-r--r-- 1 maier maier 2144574330 May 24 13:09 cylinder-38M-solution_000006.vtu
-rw-r--r-- 1 maier maier 2235272634 May 24 13:15 cylinder-38M-solution_000007.vtu

This might be related to the size of the file - I am not sure.

Manually adding the missing closing elements fixes the files. I have tested reading the files with ParaView version 5.9 and 5.10

[tjhei]

On it!

I have an idea.