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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/02/03 00:38:49 UTC

[GitHub] [arrow] nealrichardson commented on pull request #12323: ARROW-9235: [R] Support for `connection` class when reading and writing files

nealrichardson commented on pull request #12323:
URL: https://github.com/apache/arrow/pull/12323#issuecomment-1028491499


   Without having looked closely at the code, I suspect you're right about threading. IIUC R's memory allocation is not thread safe, so we can't call R functions that allocate in R with multithreading. In the conversion code, @romainfrancois did something clever to distinguish the things that could run in parallel from the things that could not. Another option to explore here, perhaps to confirm the issue, would be to do all of the things to disable multithreading (thread pools to 1, arrow.use_threads = FALSE) and see if that makes the crash go away.


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