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https://issues.apache.org/jira/browse/SPARK-28074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim updated SPARK-28074:
---------------------------------
    Issue Type: Improvement  (was: Documentation)

> [SS] Log warn message on possible correctness issue for multiple stateful 
> operations in single query
> ----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-28074
>                 URL: https://issues.apache.org/jira/browse/SPARK-28074
>             Project: Spark
>          Issue Type: Improvement
>          Components: Documentation, Structured Streaming
>    Affects Versions: 3.0.0
>            Reporter: Jungtaek Lim
>            Assignee: Jungtaek Lim
>            Priority: Minor
>             Fix For: 3.0.0
>
>
> Please refer 
> [https://lists.apache.org/thread.html/cc6489a19316e7382661d305fabd8c21915e5faf6a928b4869ac2b4a@%3Cdev.spark.apache.org%3E]
>  to see rationalization of the issue.
> tl;dr. Using multiple stateful operators without fully understanding how 
> global watermark affects the query brings correctness issue.
> While we may not want to fully block the operations given some users could 
> leverage it with understanding of global watermark, it would be necessary for 
> end users to warn on such breaking-correctness possibility, and provide 
> alternative(s).



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