[jira] [Resolved] (SPARK-18721) ForeachSink breaks Watermark in append mode

["Tathagata Das (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-18721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tathagata Das resolved SPARK-18721.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.1.0

Issue resolved by pull request 16160
[https://github.com/apache/spark/pull/16160]

> ForeachSink breaks Watermark in append mode
> -------------------------------------------
>
>                 Key: SPARK-18721
>                 URL: https://issues.apache.org/jira/browse/SPARK-18721
>             Project: Spark
>          Issue Type: Bug
>          Components: Structured Streaming
>    Affects Versions: 2.1.0
>            Reporter: Cristian Opris
>            Assignee: Shixiong Zhu
>            Priority: Critical
>             Fix For: 2.1.0
>
>
> The watermark is not updated in append mode with a ForeachSink
> Because ForeachSink creates a separate IncrementalExecution instance, the physical plan will be recreated for the logical plan, which results in a new EventTimeWatermarkExec operator being created, that's unreachable from StreamExecution. This results in the watermark never being updated, and append mode never emits results.



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