qian created SPARK-39111:
----------------------------

             Summary: Add override annotation for 
handleExtraArgs#AbstractLauncher
                 Key: SPARK-39111
                 URL: https://issues.apache.org/jira/browse/SPARK-39111
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.3.0
            Reporter: qian


An overridden method from an interface or abstract class must be marked with 
{{@Override}} annotation. To accurately determine whether the overriding is 
successful, an {{@Override}} annotation is necessary. Meanwhile, once the 
method signature in the abstract class is changed, the implementation class 
will report a compile-time error immediately.



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