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https://issues.apache.org/jira/browse/SPARK-20165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tathagata Das resolved SPARK-20165.
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Resolution: Fixed
Issue resolved by pull request 17488
[https://github.com/apache/spark/pull/17488]
> Resolve state encoder's deserializer in driver in FlatMapGroupsWithStateExec
> ----------------------------------------------------------------------------
>
> Key: SPARK-20165
> URL: https://issues.apache.org/jira/browse/SPARK-20165
> Project: Spark
> Issue Type: Sub-task
> Components: Structured Streaming
> Affects Versions: 2.2.0
> Reporter: Tathagata Das
> Assignee: Tathagata Das
> Fix For: 2.2.0
>
>
> Encoder's deserializer must be resolved at the driver where the class is
> defined. Otherwise there are corner cases using nested classes where
> resolving at the executor can fail.
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