Thanks, I agree improving that error message instead of hanging could be a
good candidate for backporting to 2.4

On Tue, Apr 21, 2020 at 6:43 PM wuyi <yi...@databricks.com> wrote:

> I have one: https://issues.apache.org/jira/browse/SPARK-31485, which could
> cause application hang.
>
>
> And, probably, also https://issues.apache.org/jira/browse/SPARK-31509, to
> make better guidance of barrier execution for user. But we do not have
> conclusion yet.
>
> Best,
>
> Yi Wu
>
>
>
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