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clarify rockstar error message about using the wrong number of MPI processes #42

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Jan 29, 2019
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clarify rockstar error message about using the wrong number of MPI processes #42

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8 changes: 5 additions & 3 deletions yt_astro_analysis/halo_finding/rockstar/rockstar.py
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Original file line number Diff line number Diff line change
Expand Up @@ -91,9 +91,11 @@ def __init__(self, num_readers, num_writers):
else:
self.num_writers = min(num_writers, psize)
if self.num_readers + self.num_writers + 1 != psize:
mylog.error('%i reader + %i writers + 1 server != %i mpi',
self.num_readers, self.num_writers, psize)
raise RuntimeError
raise RuntimeError(
'The number of MPI processes (%i) does not equal the '
'number of readers (%i) plus the number of writers '
'(%i) plus 1 server' % (
self.num_readers, self.num_writers, psize))

def run(self, handler, wg):
# Not inline so we just launch them directly from our MPI threads.
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