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Fix race condition in rundir creation #3729

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Fix race condition in rundir creation #3729

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6 changes: 5 additions & 1 deletion parsl/dataflow/rundirs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,11 @@ def make_rundir(path: str) -> str:
x = sorted([int(os.path.basename(x)) for x in prev_rundirs])[-1]
current_rundir = os.path.join(path, '{0:03}'.format(x + 1))

os.makedirs(current_rundir)
try:
os.makedirs(current_rundir)
except FileExistsError:
logger.debug("Allocated rundir {0} exists. Making rundir again.".format(current_rundir))
return make_rundir(path)
logger.debug("Parsl run initializing in rundir: {0}".format(current_rundir))
return os.path.abspath(current_rundir)

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