Hi ,
I've implemented a simple VectorWritable class as follows
package com;
import org.apache.hadoop.*;
import org.apache.hadoop.io.*;
import java.io.*;
import java.util.Vector;
public class VectorWritable implements WritableComparable {
private Vector value = new Vector();
public Vector
The readFields and write method is empty ?
When data is transfered from map phase to reduce phase, data is serialized
and deserialized , so the write and readFields will be called. You should
not leave them empty.
Jeff Zhang
On Tue, Dec 29, 2009 at 1:29 PM, bharath v <
bharathvissapragada1...@
Can you please tell me , what is the functionality of those 2 methods.
(How should i implement the same in this VectorWritable) ..
Thanks
On Tue, Dec 29, 2009 at 11:25 AM, Jeff Zhang wrote:
> The readFields and write method is empty ?
>
> When data is transfered from map phase to reduce phase,
Have a look at org.apache.hadoop.io.ArrayWritable. You may be able to
use this class in your application, or at least use it as a basis for
writing VectorWritable.
Cheers,
Tom
On Tue, Dec 29, 2009 at 1:37 AM, bharath v
wrote:
> Can you please tell me , what is the functionality of those 2 method
