You can control your map outputs based on any condition you want. I have
done that - it worked for me.
It could be your code problem that its not working for you.
Can you please share your map code or cross-check whether your conditions
are correct ?
Regards,
Praveenesh
On Mon, Jun 4, 2012 at 5:52 PM, murat migdisoglu <murat.migdiso...@gmail.com
> wrote:
> Hi,
> I have a small application where I have only mapper class defined(no
> reducer, no combiner).
> Within the mapper class, I have an if condition according to which I decide
> If I want to put something in the context or not.
> If my condition is not match, I want that mapper does not give any output
> to the hdfs.
> But apparently, this does not worj as I expected. Once I run my job, a file
> per mapper in the hdfs with 87 kb of size.
>
> the if block that I'm using in the map method is as following:
> if (ip == null || ip.equals(cip)) {
> Text value = new Text(mwrapper.toJson());
> word.set(ip);
> context.write( word, value);
> } else {
> log.info("ip not match [" + ip + "]");
> }
> }
> }//end of mapper method
>
> How can I manage that? Does mapper always need to have an output?
>
> --
> "Find a job you enjoy, and you'll never work a day in your life."
> Confucius
>
