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Posted to issues@spark.apache.org by "Burak Yavuz (JIRA)" <ji...@apache.org> on 2017/10/10 22:07:00 UTC
[jira] [Created] (SPARK-22238) EnsureStatefulOpPartitioning
shouldn't ask for the child RDD before planning is completed
Burak Yavuz created SPARK-22238:
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Summary: EnsureStatefulOpPartitioning shouldn't ask for the child RDD before planning is completed
Key: SPARK-22238
URL: https://issues.apache.org/jira/browse/SPARK-22238
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Affects Versions: 2.3.0
Reporter: Burak Yavuz
Assignee: Burak Yavuz
In EnsureStatefulOpPartitioning, we check that the inputRDD to a SparkPlan has the expected partitioning for Streaming Stateful Operators. The problem is that we are not allowed to access this information during planning.
The reason we added that check was because CoalesceExec could actually create RDDs with 0 partitions. We should fix it such that when CoalesceExec says that there is a SinglePartition, there is in fact an inputRDD of 1 partition instead of 0 partitions.
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