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https://issues.apache.org/jira/browse/SPARK-19873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-19873:
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Assignee: Apache Spark
> If the user changes the number of shuffle partitions between batches,
> Streaming aggregation will fail.
> ------------------------------------------------------------------------------------------------------
>
> Key: SPARK-19873
> URL: https://issues.apache.org/jira/browse/SPARK-19873
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.1.0
> Reporter: Kunal Khamar
> Assignee: Apache Spark
>
> If the user changes the shuffle partition number between batches, Streaming
> aggregation will fail.
> Here are some possible cases:
> - Change "spark.sql.shuffle.partitions"
> - Use "repartition" and change the partition number in codes
> - RangePartitioner doesn't generate deterministic partitions. Right now it's
> safe as we disallow sort before aggregation. Not sure if we will add some
> operators using RangePartitioner in future.
> Fix:
> Record # shuffle partitions in offset log and enforce in next batch
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