polish

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/feign/FeignClient.java

@@ -93,7 +93,8 @@ public @interface FeignClient {
 	/**
 	 * Define a fallback factory for the specified Feign client interface. The fallback
 	 * factory must produce instances of fallback classes that implement the interface
-	 * annotated by {@link FeignClient}.
+	 * annotated by {@link FeignClient}. The fallback factory must be a valid spring
+	 * bean.
 	 *
 	 * @see feign.hystrix.FallbackFactory for details.
 	 */