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https://issues.apache.org/jira/browse/ARROW-15362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17478122#comment-17478122
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Devin Petersohn commented on ARROW-15362:
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Originally reported here: https://github.com/modin-project/modin/issues/3982
> 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
> Priority: Critical
>
> 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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