Xingcan Cui created FLINK-8407:
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Summary: Setting the parallelism after a partitioning operation
should be forbidden
Key: FLINK-8407
URL: https://issues.apache.org/jira/browse/FLINK-8407
Project: Flink
Issue Type: Bug
Components: DataStream API
Reporter: Xingcan Cui
Partitioning operations ({{shuffle}}, {{rescale}}, etc.) for a {{DataStream}}
create new {{DataStreams}}, which allow the users to set parallelisms for them.
However, the {{PartitionTransformations}} in these returned {{DataStreams}}
will only add virtual nodes, whose parallelisms could not be specified, in the
execution graph. We should forbid users to set the parallelism after a
partitioning operation since they won't actually work. Also the corresponding
documents should be updated.
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