[jira] [Commented] (ARROW-14329) [C++] Segfault when calling ExecPlan::StopProducing

["Weston Pace (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-14329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17565020#comment-17565020 ] 

Weston Pace commented on ARROW-14329:
-------------------------------------

A number of these kinds of problems came down to nodes calling StopProducing on downstream nodes leading to StopProducing being called twice on a single node in various situations.  I think [~sakras] fixed several of these.

{{StopProducing}} is still a little bit clunky however.  The merge generator doesn't pass the cancellation down to the readers and so read operations may continue to read for some time after the call and I think it may be possible that some memory is leaked.

> [C++] Segfault when calling ExecPlan::StopProducing
> ---------------------------------------------------
>
>                 Key: ARROW-14329
>                 URL: https://issues.apache.org/jira/browse/ARROW-14329
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Neal Richardson
>            Priority: Major
>
> Observed on ARROW-12763, have not tried to debug or reproduce further
> https://github.com/apache/arrow/pull/11405#discussion_r728391508



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