Devin Petersohn created ARROW-15362:
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Summary: Setting OMP_NUM_THREADS to 1 causes dataset to hang
Key: ARROW-15362
URL: https://issues.apache.org/jira/browse/ARROW-15362
Project: Apache Arrow
Issue Type: Bug
Reporter: Devin Petersohn
import os
import pyarrow.dataset as ds
os.environ["OMP_NUM_THREADS"] = "1" # offending line
dfile = 'any.csv'
data = ds.dataset(dfile, format='csv')
rb_iter = iter(data.to_batches())
next(rb_iter) # hangs
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