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https://issues.apache.org/jira/browse/ARROW-17771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607136#comment-17607136
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Joris Van den Bossche commented on ARROW-17771:
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The updated conda patch for Python 3.11 (which is removing the effect of this
env variable, https://github.com/conda-forge/python-feedstock/pull/577) has the
following explainer:
{quote}Note that in conda python <3.11, there was an option
CONDA_DLL_SEARCH_MODIFICATION=1 to add directories in PATH to the search
order, but this was deprecated in 3.10 and removed in 3.11 in favour of using
AddDllDirectory
{quote}
> [Python] Python does not finds the DLLs correctly on Windows
> ------------------------------------------------------------
>
> Key: ARROW-17771
> URL: https://issues.apache.org/jira/browse/ARROW-17771
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Alenka Frim
> Priority: Critical
> Fix For: 10.0.0
>
>
> It seems that after the Python refactoring PR
> [https://github.com/apache/arrow/pull/13311] (ARROW-16340) Python is unable
> to find {{arrow_python}} even though the library it is imported into the
> correct directory.
> Currently this issue is fixed with setting an additional environment variable:
> {code:}
> CONDA_DLL_SEARCH_MODIFICATION_ENABLE=1
> {code}
> We need to investigate further why this error is happening after the
> [refactoring|https://github.com/apache/arrow/pull/13311] and make sure Python
> is able to find the libraries on Windows without the additional env vars
> being specified.
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