nutch hadoop only one slave is crawling

[Dustine Rene Bernasor]

I have a 3-slaves hadoop cluster and I am performing a crawl on a single 
website. However, only 1 slave is performing fetching (though the other 
slaves are still alive). Is this normal behavior if only 1 domain is 
crawled? Is there any way to force the other slaves to fetch?

Thanks.