GitHub user potiuk added a comment to the discussion: Compatibility issues with 
polars: Any calculation of polars out of a task will block calculation in the 
task

BTW. some random similar issues returned by google threads mention that polars 
might hang where it requires to open many sockets/files and they are limited - 
maybe that is your case on your machine where workers are run (i.e. 
environmental issue) , but that's a totally wild guess. 

GitHub link: 
https://github.com/apache/airflow/discussions/45756#discussioncomment-11870070

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