THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Exceptions are handed to ResultCollector.addResult, causing ClassCastExceptions
On the ResultSender, there is a method to return exceptions using sendException.
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Since the type of T is the user result type, trying to call add result will almost invariably result in the ClassCastException, like below
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See
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Must use ResultCollector returned from FunctionService.execute
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