From a38973a8a760811136e1ae3407f251286ab19364 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20Kl=C3=B6ckner?= <inform@tiker.net>
Date: Tue, 21 Aug 2018 14:21:16 -0400
Subject: [PATCH] Use -m mpi4py.run in spawning subprocesses to avoid hangs

---
 test/test_partition.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/test_partition.py b/test/test_partition.py
index 8dd23997..8ff25caa 100644
--- a/test/test_partition.py
+++ b/test/test_partition.py
@@ -535,7 +535,9 @@ def test_mpi_communication(num_partitions, order):
         "mpiexec", "-np", str(num_ranks),
         "-x", "RUN_WITHIN_MPI=1",
         "-x", "order=%d" % order,
-        sys.executable, __file__],
+
+        # https://mpi4py.readthedocs.io/en/stable/mpi4py.run.html
+        sys.executable, "-m", "mpi4py.run", __file__],
         )
 
 # }}}
-- 
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