[jira] [Created] (FLINK-8407) Setting the parallelism after a partitioning operation should be forbidden

["Xingcan Cui (JIRA)" <ji...@apache.org>]

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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