pvpython/pvbatch with MPI Build Causes Deadlock on Consecutive Runs

[anilbeycorintis]

I’m experiencing an issue with ParaView’s pvpython and pvbatch when using an MPI-enabled build (ParaView-5.11.2-egl-MPI-Linux-Python3.9). Specifically, when I run pvpython or pvbatch scripts multiple times from the same parent process (e.g., within a Python testing framework like pytest), the first execution completes successfully, but subsequent runs hang indefinitely.

• Is there a supported method to disable or bypass MPI initialization in pvpython/pvbatch when using an MPI-enabled build?
• Are there any known workarounds or patches that address this issue?
• Would building ParaView from source without MPI support be the only viable solution?

I appreciate any guidance or suggestions you can provide.

[mwestphal (Mathieu Westphal (Kitware))]

@anilbeycorintis

Is there a supported method to disable or bypass MPI initialization in pvpython/pvbatch when using an MPI-enabled build?

--no-mpi should do the trick

Still an issue to open, this should not be needed. Could you open it ?

https://gitlab.kitware.com/paraview/paraview/-/issues

[anilbeycorintis]

Even when no-mpi flag is passed there are still multiple processes getting launched.

Ok thanks I will create an issue on the repository.

[mwestphal (Mathieu Westphal (Kitware))]

@anilbeycorintis

Even when no-mpi flag is passed there are still multiple processes getting launched.

I do not see this behavior, even without the --no-mpi flag