Aljoscha Krettek created FLINK-19123:
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             Summary: TestStreamEnvironment does not use shared MiniCluster for 
executeAsync()
                 Key: FLINK-19123
                 URL: https://issues.apache.org/jira/browse/FLINK-19123
             Project: Flink
          Issue Type: Bug
          Components: API / DataStream, Runtime / Coordination, Tests
            Reporter: Aljoscha Krettek


TestStreamEnvironment does override {{execute()}} but not {{executeAsync()}} . 
Now, {{execute()}} goes against the {{MiniCluster}} session that was started by 
a {{MiniClusterWithClientResource}} or some other method that uses 
{{TestStreamEnvironment}}. However, {{executeAsync()}} will go through the 
normal {{StreamExecutionEnvironment}} logic and tries to find an executor, does 
not know that it is a testing environment.

Up until recently, you would have gotten an exception that tells you that no 
executor is configured, then we would have found out that we need to override 
{{executeAsync()}} in {{TestStreamEnvironment}}. However, we currently 
configure a local executor in the constructor: 
[https://github.com/apache/flink/blob/2160c3294ef87143ab9a4e8138cb618651499792/flink-test-utils-parent/flink-test-utils/src/main/java/org/apache/flink/streaming/util/TestStreamEnvironment.java#L59].
 With this, you basically get the “local environment” behaviour when you call 
{{executeAsync()}}, which starts a cluster for the job and shuts it down when 
the job finishes. This basically makes the {{TestStreamEnvironment}} cluster 
sharing useless.



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