code: function subscribeError(message, exceptionMessage, exceptionType) {
  		reply(proto.writeSubscribeException(
  			message.id, exceptionMessage, exceptionType));
  		dequeueSubUnsubRequest(message.itemName);
  		fireFirstSubUnsubEvent(message.itemName);
  	}
docs: Sends a subscribe error reply
  
  @param {Object} message the decoded request message
  @private