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https://issues.apache.org/jira/browse/ARROW-15362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17478161#comment-17478161
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Devin Petersohn commented on ARROW-15362:
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Thanks [~westonpace] !
> 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
> Components: C++
> Affects Versions: 6.0.1
> Reporter: Devin Petersohn
> Assignee: Weston Pace
> Priority: Critical
> Fix For: 7.0.0
>
>
> 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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