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https://issues.apache.org/jira/browse/ARROW-6667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou reassigned ARROW-6667:
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Assignee: Aaron Opfer
> [Python] Avoid Reference Cycles in pyarrow.parquet
> --------------------------------------------------
>
> Key: ARROW-6667
> URL: https://issues.apache.org/jira/browse/ARROW-6667
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Aaron Opfer
> Assignee: Aaron Opfer
> Priority: Minor
> Labels: pull-request-available
> Fix For: 0.15.0
>
> Attachments: cycle1_build_nested_path.PNG, cycle2_open_dataset.PNG
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> 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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