krfricke commented on issue #15233:
URL: https://github.com/apache/arrow/issues/15233#issuecomment-1421103441
I think this issue is a duplicate of #32372. I've added more details in that
issue, but in a nutshell, pyarrow.fs.copy_files hangs for s3 buckets and with
`use_threads=True` if more files are uploaded than CPU cores available:
```
mkdir -p /tmp/pa-s3
cd /tmp/pa-s3
for i in {1..7}; do touch $i.txt; done
# This works
python -c "import pyarrow.fs; pyarrow.fs.copy_files('/tmp/pa-s3',
's3://bucket/folder')"
for i in {1..8}; do touch $i.txt; done
# This hangs forever
python -c "import pyarrow.fs; pyarrow.fs.copy_files('/tmp/pa-s3',
's3://bucket/folder')"
```
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