cpugputpu opened a new pull request #11181: [FLINK-16230][tests]Use 
LinkedHashSet instead of HashSet
URL: https://github.com/apache/flink/pull/11181
 
 
   For background information, please refer to 
https://issues.apache.org/jira/browse/FLINK-16230
   
   ## What is the purpose of the change
   The fix for the test is to use LinkedHashSet instead of HashSet so that the 
iteration order will be deterministic across different JVM versions or vendors, 
thus making the test more stable.
   
   
   ## Verifying this change
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? no
     - If yes, how is the feature documented? not applicable
   

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