kahemker opened a new issue, #46080: URL: https://github.com/apache/arrow/issues/46080
### Describe the bug, including details regarding any error messages, version, and platform. **Summary** I would like to migrate a project from conda to uv and it appears that when uv builds the environment, pyarrow can no longer write orc files that include datetimes with timezones. I have confirmed the same problem exists even if you install pyarrow and polars with pip which makes me believe this related to the distributed wheels on Windows. I have run `pyarrow.util.download_tzdata_on_windows()`. The files downloaded successfully. [I created a minimum reproducible example here.](https://github.com/kahemker/pyarrow-orc-failure) Steps to recreate the problem. 1. Clone the repo 2. Run `uv sync` to install polars and pyarrow using pyproject.toml 3. Run `uv run main.py` The error message is ``` Traceback (most recent call last): File "W:\code\test_pyarrow\main.py", line 21, in <module> main() File "W:\code\test_pyarrow\main.py", line 17, in main writer.write(df.to_arrow().cast(table_schema)) File "W:\code\test_pyarrow\.venv\Lib\site-packages\pyarrow\orc.py", line 289, in write self.writer.write(table) File "pyarrow\\_orc.pyx", line 439, in pyarrow._orc.ORCWriter.write File "pyarrow\\error.pxi", line 92, in pyarrow.lib.check_status pyarrow.lib.ArrowException: Unknown error: Time zone file /usr/share/zoneinfo/GMT does not exist. Please install IANA time zone database and set TZDIR env. ``` You can build the working conda environment by following these steps (again starting from the minimum reproducible example) 1. `conda env create -f environment.yml` 2. `conda activate test_pyarrow_conda` 3. `python main.py` The code will terminate successfully and the test.orc.snappy file will exist in the directory. **Platform** Windows 10 Pro, Version 10.0.19045, 64-bit Windows 11 Pro, 24H2, 26100.3775 **Version** pyarrow-19.0.1 polars-1.26.0 uv 0.6.12 (https://github.com/astral-sh/uv/commit/e4e03833fc430d44384362a121f2a24b49e0cb4a 2025-04-02) **Python version** Python 3.12.9 ### Component(s) Python -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
