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https://issues.apache.org/jira/browse/SPARK-23827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tathagata Das resolved SPARK-23827.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.3.1
2.4.0
3.0.0
Issue resolved by pull request 20941
[https://github.com/apache/spark/pull/20941]
> StreamingJoinExec should ensure that input data is partitioned into specific
> number of partitions
> -------------------------------------------------------------------------------------------------
>
> Key: SPARK-23827
> URL: https://issues.apache.org/jira/browse/SPARK-23827
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.3.0
> Reporter: Tathagata Das
> Assignee: Tathagata Das
> Priority: Critical
> Fix For: 3.0.0, 2.4.0, 2.3.1
>
>
> Currently, the requiredChildDistribution does not specify the partitions.
> This can cause the weird corner cases where the child's distribution is
> `SinglePartition` which satisfies the required distribution of
> `ClusterDistribution(no-num-partition-requirement)`, thus eliminating the
> shuffle needed to repartition input data into the required number of
> partitions (i.e. same as state stores). That can lead to "file not found"
> errors on the state store delta files as the micro-batch-with-no-shuffle will
> not run certain tasks and therefore not generate the expected state store
> delta files.
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