java - Helpful error messages in jersey -

i implementing restful webapp in jersey on grizzly 2 server , have following class.

@path("/faulttree") public class faulttreeresource  {    @get   @produces(mediatype.text_plain)   public string sendgetjson(@queryparam("treeid") string treeid) {      return "you requested fault tree number "+treeid;   } 

}

if go http://localhost:8080/faulttree message "request failed", because forgot query parameter. behavior makes sense in production. however, during development more helpful error message. how can enable helpful error messages or @ least logging in jersey?

the sendgetjson-method isn't executed (according eclipse debugger), logging there not option.

when want enable logging in grizzly add following code above call startserver():

 logger l = logger.getlogger("org.glassfish.grizzly.http.server.httphandler");  l.setlevel(level.fine);  l.setuseparenthandlers(false);  consolehandler ch = new consolehandler();  ch.setlevel(level.all);  l.addhandler(ch);