Description
Currently, in EvaluatorException in REEF .Net, it gets exception message from Java FailedEvaluatorBridge.getCause() which uses the message from getCause() of java EvaluatorException.
As the "cause" property in Java EvaluatorException doesn't contain any value, therefore the message in C# EvaluatorException doesn't have proper exception message.
At this phase, we should at least return exception message instead.