No such method exception Hadoop

Question

When I am running a Hadoop .jar file from the command prompt, it throws an exception saying no such method StockKey method.

StockKey is my custom class defined for m

Answer 1

For scala too, I fixed the problem adding default constructor as below,

class IntPair (first : IntWritable, second : IntWritable) extends WritableComparable[IntPair] {

     def this() = this(first = new IntWritable(), second = new IntWritable())

     def getFirst () : IntWritable = {
         first
     }

     def getSecond () : IntWritable = {
         second
     }

}