SuDewei created FLINK-34500:
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             Summary: Release Testing: Verify FLINK-33261 Support Setting 
Parallelism for Table/SQL Sources
                 Key: FLINK-34500
                 URL: https://issues.apache.org/jira/browse/FLINK-34500
             Project: Flink
          Issue Type: Sub-task
          Components: Connectors / Parent, Table SQL / API
    Affects Versions: 1.19.0
            Reporter: SuDewei
             Fix For: 1.19.0


This issue aims to verify 
[FLIP-367|https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=263429150].
Volunteers can verify it by following the [doc 
changes|https://github.com/apache/flink/pull/24234]. Since currently only the 
pre-defined DataGen connector and user-defined connector supports setting 
source parallelism, volunteers can verify it through DataGen Connector. The 
basic steps include:
1. Start a Flink cluster and submit a Flink SQL Job to the cluster.
2. In this Flink Job, use the DataGen SQL Connector to generate data.
3. Specify the parameter scan.parallelism in DataGen connector options as 
user-defined parallelism instead of default parallelism.
4. Observe whether the parallelism of the source has changed on the job graph 
of the Flink Application UI, and whether the shuffle mode is correct.
If everything is normal, you will see that the parallelism of the source 
operator is indeed different from that of downstream, and the shuffle mode is 
rebalanced by default.



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