hadoop hbase mapreduce combiner

Question

Now I am writing a Java program to write the output into HBase using Hadoop MapReduce. The question is about the Combiner class. Because now my reduce class extends TableReducer, instead of Reducer. So what about my combiner class, should it also extends TableReducer, or still extends Reducer?

Answer 1

您的组合器类应扩展TableReducer本身，而不应扩展Reducer。