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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/12/03 06:15:00 UTC
[jira] [Commented] (SPARK-33472) IllegalArgumentException when
applying RemoveRedundantSorts before EnsureRequirements
[ https://issues.apache.org/jira/browse/SPARK-33472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17242944#comment-17242944 ]
Apache Spark commented on SPARK-33472:
--------------------------------------
User 'allisonwang-db' has created a pull request for this issue:
https://github.com/apache/spark/pull/30584
> IllegalArgumentException when applying RemoveRedundantSorts before EnsureRequirements
> -------------------------------------------------------------------------------------
>
> Key: SPARK-33472
> URL: https://issues.apache.org/jira/browse/SPARK-33472
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.8, 3.0.2, 3.1.0
> Reporter: Allison Wang
> Assignee: Allison Wang
> Priority: Major
> Fix For: 2.4.8, 3.0.2, 3.1.0
>
>
> `RemoveRedundantSorts` rule uses SparkPlan's `outputPartitioning` to check whether a sort node is redundant. Currently, it is added before `EnsureRequirements`. Since `PartitioningCollection` requires left and right partitioning to have the same number of partitions, which is not necessarily true before applying `EnsureRequirements`, the rule can fail with the following exception:
> {{IllegalArgumentException: requirement failed: PartitioningCollection requires all of its partitionings have the same numPartitions.}}
> We should switch the order between these two rules to satisfy the requirement when instantiating `PartitioningCollection`.
>
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