Issue when working with ArrayWritables
You need to override default behavior of toString() method in your IntArrayWritable implementation.
Please try this:
import org.apache.hadoop.io.ArrayWritable;import org.apache.hadoop.io.IntWritable;public class IntArrayWritable extends ArrayWritable { public IntArrayWritable() { super(IntWritable.class); } public IntArrayWritable(IntWritable[] values) { super(IntWritable.class, values); } @Override public String toString() { StringBuilder sb = new StringBuilder("["); for (String s : super.toStrings()) { sb.append(s).append(" "); } sb.append("]") return sb.toString(); }}If you liked this answer please mark it as accepted. Thank you.