Kostas Kloudas created FLINK-15039:

             Summary: Remove default close() implementation from ClusterClient
                 Key: FLINK-15039
                 URL: https://issues.apache.org/jira/browse/FLINK-15039
             Project: Flink
          Issue Type: Improvement
          Components: Client / Job Submission
    Affects Versions: 1.10.0
            Reporter: Kostas Kloudas
            Assignee: Kostas Kloudas

Currently the {{ClusterClient}} interface extends {{AutoCloseable}} but 
provides a default, empty implementation for the {{close()}} method. This is 
error-prone as subclass implementations may not think that they need to 
actually implement a proper {{close()}}.


To this end, this issue aims at removing the default implementation and each 
implementation of the {{ClusterClient}} will have to explicitly provide its own 

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