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https://issues.apache.org/jira/browse/ARROW-11802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Lamb reassigned ARROW-11802:
-----------------------------------
Assignee: Andrew Lamb
> [Rust][DataFusion] Mixing of crossbeam channel and async tasks can lead to
> deadlock
> -----------------------------------------------------------------------------------
>
> Key: ARROW-11802
> URL: https://issues.apache.org/jira/browse/ARROW-11802
> Project: Apache Arrow
> Issue Type: Bug
> Components: Rust - DataFusion
> Reporter: Andrew Lamb
> Assignee: Andrew Lamb
> Priority: Major
>
> [~edrevo] noticed, on
> https://github.com/apache/arrow/pull/9523#issuecomment-786237494, that the
> use of crossbeam channels can potentially deadlock datafusion
> The use of crossbeam channel is left over from earlier, non `async`
> implementations and get been fingered in some hangs that [~MikeSeddonAU] has
> observed in DataFusion ). Specifically the crossbeam channel can block a
> thread when the channel is full or empty, which can result in blocking all
> the tokio executor threads and deadlocking the system
> The proposal is is to use tokio's mpsc channels instead of crossbeam which
> can properly yield back to tokio to run another task when the channel is
> either full or empty. .
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