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Posted to jira@arrow.apache.org by "Devin Petersohn (Jira)" <ji...@apache.org> on 2022/01/18 18:39:00 UTC

[jira] [Created] (ARROW-15362) Setting OMP_NUM_THREADS to 1 causes dataset to hang

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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