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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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Apache Spark reassigned SPARK-28074:
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Assignee: Apache Spark
> [SS] Document caveats on using multiple stateful operations in single query
> ---------------------------------------------------------------------------
>
> Key: SPARK-28074
> URL: https://issues.apache.org/jira/browse/SPARK-28074
> Project: Spark
> Issue Type: Documentation
> Components: Structured Streaming
> Affects Versions: 3.0.0
> Reporter: Jungtaek Lim
> Assignee: Apache Spark
> Priority: Major
>
> 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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