Github user fangshil commented on the issue:

    https://github.com/apache/spark/pull/21276
  
    made a few changes: 
    since getSimpleName is a method of Class, it makes sense for 
Utils.getSimpleName to takes a Class param
    Utils.getSimpleName will try to use the Class's getSimpleName first, and 
only use the alternative if the internal error is caught. This should minimize 
the potential impact of this patch
    updated a few other places where similar issue may happen


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