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Do not merge this PR. This is only a PoC at the moment.
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Are these changes tested?
Are there any user-facing changes?
This PR includes breaking changes to public APIs. (If there are any breaking changes to public APIs, please explain which changes are breaking. If not, you can remove this.)
This PR contains a "Critical Fix". (If the changes fix either (a) a security vulnerability, (b) a bug that caused incorrect or invalid data to be produced, or (c) a bug that causes a crash (even when the API contract is upheld), please provide explanation. If not, you can remove this.)
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raulcd
changed the title
WIP: GH-38536: [Python][Packaging] PoC to split libarrow_s3 into its own wheel
GH-38536: [Python][Packaging] PoC to split libarrow_s3 into its own wheel
Sep 22, 2026
Indirectly we have tested the error message works correctly when pyarrow-s3 isn't installed (or loaded in this case):
+ python -c 'from pyarrow._fs import FileSystem; FileSystem.from_uri('\''s3://bucket/key?region=***'\'')'
Traceback (most recent call last):
File "<string>", line 1, in <module>
from pyarrow._fs import FileSystem; FileSystem.from_uri('s3://bucket/key?region=***')
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "pyarrow/_fs.pyx", line 517, in pyarrow._fs.FileSystem.from_uri
pyarrow.lib.ArrowInvalid: Unrecognized filesystem type in URI: s3://bucket/key?region=*** (Error loading shared library libarrow_s3.so.2600: No such file or directory (needed by /usr/local/lib/python3.14/site-packages/pyarrow/_s3fs.cpython-314-x86_64-linux-musl.so). If pyarrow was installed from PyPI, S3 support is provided by the separate 'pyarrow-s3' package)
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raulcd
changed the title
Caution
Do not merge this PR. This is only a PoC at the moment.
Rationale for this change
What changes are included in this PR?
Are these changes tested?
Are there any user-facing changes?
This PR includes breaking changes to public APIs. (If there are any breaking changes to public APIs, please explain which changes are breaking. If not, you can remove this.)
This PR contains a "Critical Fix". (If the changes fix either (a) a security vulnerability, (b) a bug that caused incorrect or invalid data to be produced, or (c) a bug that causes a crash (even when the API contract is upheld), please provide explanation. If not, you can remove this.)
Was AI used for this PR?
In accordance to the AI generation guidelines, please disclose below whether and how AI was used in this PR.
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Reviewed before submission by: