Exception in thread \"main\" java.lang.IllegalArgumentException: Fetcher: No agents listed in \'http.agent.name\' property.
at org.apache.nutch.fetcher.Fetch
using 1.3? If so make sure you changed nutch-site.xml (and not default) in runtime/local/conf Changing the conf in NUTCH_HOME/conf won't be copied to the runtime dirs unless you rebuild with ant.
Try giving the agent name for http.robots.agents also. It worked for me. I didn't get that message thereafter!!!