Answering my own question.  Looks like this can be done by implementing 
SparkListener with method

  def onExecutorAdded(executorAdded: SparkListenerExecutorAdded): Unit

as the SparkListenerExecutorAdded object has the info.  
--
    Nick

________________________________________


Am using Spark 2.3 and looking for an API in Java to fetch the list of 
executors.  Need host and Id info for the executors.

Thanks for any pointers,
--
    Nick

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