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  1. Apache Arrow
  2. ARROW-6667

[Python] Avoid Reference Cycles in pyarrow.parquet

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      Reference cycles appear in two places inside pyarrow.parquet which causes these objects to have much longer lifetimes than necessary:

       

      _build_nested_path has a reference cycle because the closured function refers to the parent cell which also refers to the closured function again (objgraph shown in attachment)

      open_dataset_file is partialed with self inside the ParquetFile class (objgraph shown in attachment).

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        1. cycle2_open_dataset.PNG
          51 kB
          Aaron Opfer
        2. cycle1_build_nested_path.PNG
          30 kB
          Aaron Opfer

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              • Assignee:
                AaronOpferCTC Aaron Opfer
                Reporter:
                AaronOpferCTC Aaron Opfer
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