[GitHub] [incubator-dubbo] freeseawind opened issue #2511: 集群 Failfast 配置问题

[GitHub]

- [ ] I have searched the 
[issues](https://github.com/apache/incubator-dubbo/issues) of this repository 
and believe that this is not a duplicate.
- [ ] I have checked the 
[FAQ](https://github.com/apache/incubator-dubbo/blob/master/FAQ.md) of this 
repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.6.2
* Operating System version: win7
* Java version: 1.8

### Steps to reproduce this issue

1. 启动两个服务提供者
2. 对其中一个服务提供者设置断点使其不响应客户端
3. 启动服务消费者消费服务

#### 服务消费者代码

```
@Reference(loadbalance = "random", cluster = "failfast", retries = 2)
private DemoService failFastService;

@Test
 public void testFail()
 {
       String str = failFastService.sayHello("freeseawind");
        System.out.println(str);
 }
```
##### 服务提供者示例截图

![image](https://user-images.githubusercontent.com/19760912/45597745-2f895e00-ba03-11e8-8b06-35bfb99570c7.png)


问题重现工程地址：https://github.com/freeseawind/copycat-dubbo

### Expected Result

调用失败后立即结束

### Actual Result

随机重试了服务消费者


[ Full content available at: 
https://github.com/apache/incubator-dubbo/issues/2511 ]
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