[jira] [Resolved] (SPARK-23777) Missing DAG arrows between stages

["Hyukjin Kwon (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-23777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-23777.
----------------------------------
    Resolution: Incomplete

> Missing DAG arrows between stages
> ---------------------------------
>
>                 Key: SPARK-23777
>                 URL: https://issues.apache.org/jira/browse/SPARK-23777
>             Project: Spark
>          Issue Type: Bug
>          Components: Web UI
>    Affects Versions: 1.3.0, 2.3.0
>            Reporter: Stefano Pettini
>            Priority: Trivial
>              Labels: bulk-closed
>         Attachments: Screenshot-2018-3-23 RDDTestApp - Details for Job 0.png
>
>
> In the Spark UI DAGs, sometimes there are missing arrows between stages. It seems to happen when the same RDD is shuffled twice.
> For example in this case:
> {{val a = context.parallelize(List(10, 20, 30, 40, 50)).keyBy(_ / 10)}}
> {{val b = a join a}}
> {{b.collect()}}
> There's a missing arrow from stage 1 to 2.
> _This is an old one, since 1.3.0 at least, still reproducible in 2.3.0._



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