Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved org.apache.hadoop.io.LongWritable

Type mismatch in key from map: expected org.apache.hadoop.io.LongWritable, recieved org.apache.hadoop.io.Text 역시 구글, 타입을 지정안해서 나는 오류 였습니다.스택오버플로 짱 Add these 2 lines in your code :job.setMapOutputKeyClass(Text.class); job.setMapOutputValueClass(IntWritable.class); You are using TextOutputFormat which emits LongWritable key and Text value by default, but you are emitting Text as key and IntWritabl..

원문링크 : Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved org.apache.hadoop.io.LongWritable