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• This is a breaking, incompatible change because (1) TimestampExtractor interface is changed and (2) we remove an exception.changed an exception.
  • If user has a custom timestamp extractor, she needs to change her code (otherwise it won't compile)
• Using default timestamp extractor and if use reacts to source node exception: StreamsException("Extracted timestamp value is negative, which is not allowed."); 
  she must change code an react on 
• By default, the overall behavior is the same as before this KIP (using default timestamp extractor use gets an exception in case of a negative timestamp).
• Custom timestamp extractors must be updated by the user to adopt the new interface.

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