Getting stack overflow error when running recursive linear search

I realize that a binary search would be much more efficient and I even have one working but I'm required to write a recursive linear search for a lab. i keep getting stack overflow on the method linSearch(), specifically on line 33.

I'm required to search arrays as big as 1,280,000.

import java.util.Scanner;
public class linSearch {    
    public static void main(String[] args){
       Scanner in = new Scanner(System.in);
       System.out.println("enter size");
       int size = in.nextInt();
       System.out.println("enter numb");
       double numb = in.nextDouble();
       double [] array = new double[size];
       for(int i = 0; i < 30; i++){
          for(int j = 0; j < size-1; j++){
              double random = (int)(Math.random() * 1000000);
              array[j] = (double)(random / 100);
          }
          int position = linSearch(array, numb, 0);
          if(position == -1){
              System.out.println("the term was not found");
         }
        else{
            System.out.println("the term was found");
        }
    }
}
public static int linSearch(double[] array, double key, int counter){
    if(counter == array.length){
        return -1;
    }
        if(array[counter] == key){
            return counter;
        }
        else{
            counter += 1;
            return linSearch(array, key, counter);  //error occurs here
        }
    }
}