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https://issues.apache.org/jira/browse/SPARK-47331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim resolved SPARK-47331.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 45447
[https://github.com/apache/spark/pull/45447]
> Serialization using case classes/primitives/POJO based on SQL encoder for
> Arbitrary State API v2.
> --------------------------------------------------------------------------------------------------
>
> Key: SPARK-47331
> URL: https://issues.apache.org/jira/browse/SPARK-47331
> Project: Spark
> Issue Type: Task
> Components: Structured Streaming
> Affects Versions: 4.0.0
> Reporter: Jing Zhan
> Assignee: Jing Zhan
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> In the new operator for arbitrary state-v2, we cannot rely on the
> session/encoder being available since the initialization for the various
> state instances happens on the executors. Also, we can only support limited
> state types with the available encoders. Hence, for the state serialization,
> we propose to serialize primitives/case classes/POJO with SQL encoder.
> Leveraging SQL encoder can speed up the serialization.
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