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Backport PR #4875 on branch stable (BUG: create duplicate of MPI communicator, to avoid double comm.Free) #4886

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Backport PR #4875 on branch stable (BUG: create duplicate of MPI communicator, to avoid double comm.Free) #4886

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4 changes: 3 additions & 1 deletion yt/utilities/parallel_tools/parallel_analysis_interface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,9 @@ def enable_parallelism(suppress_logging=False, communicator=None):

# if no communicator specified, set to COMM_WORLD
if communicator is None:
communicator = MPI.COMM_WORLD
communicator = MPI.COMM_WORLD.Dup()
else:
communicator = communicator.Dup()

parallel_capable = communicator.size > 1
if not parallel_capable:
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