[jira] [Resolved] (ARROW-11687) [Rust][DataFusion] RepartitionExec Hanging

["Andrew Lamb (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Lamb resolved ARROW-11687.
---------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Issue resolved by pull request 9523
[https://github.com/apache/arrow/pull/9523]

> [Rust][DataFusion] RepartitionExec Hanging
> ------------------------------------------
>
>                 Key: ARROW-11687
>                 URL: https://issues.apache.org/jira/browse/ARROW-11687
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Rust - DataFusion
>            Reporter: Mike Seddon
>            Assignee: Mike Seddon
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Found an interesting defect where the final partition of the `RepartitionExec::execute` thread spawner was consistently not being spawned via `tokio::spawn`. This meant that `RepartitionStream::poll_next` was sitting waiting forever for data that never arrived.
> It looks like a race condition where the `JoinHandle` was not being `await`ed and something strange going on with the internals of tokio like lazy evaluation?



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