Hi, We have class hierarchy for output value for both mapper as well as reducer class as parent (abstract class) , child1,child2,… We have mapper class which is specified with its outputvalue class as parent class ; the map function will emit either child1 or child2 depending on the logic we used ( and reducer is having its inputvalue class as parent class). But we are getting error as "java.io.IOException: Type mismatch in value from map: expected parent classreceived child class” So is this possible to specify parent class as output/inputvalue class in case of mapper as well as in reducer ; since we want to follow some object-oriented approach. What will be the correct way of achieving this ?
- Anuja
