- [x] I have searched the [issues](https://github.com/apache/incubator-dubbo/issues) of this repository and believe that this is not a duplicate.
- [x] 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: 2.7.2-SNAPSHOT
* Operating System version: windows1
* Java version: 1.8

### Steps to reproduce this issue
```java
public class RedisMetadataReport extends AbstractMetadataReport {

    private final static Logger logger = LoggerFactory.getLogger(RedisMetadataReport.class);

    final JedisPool pool;

    public RedisMetadataReport(URL url) {
        super(url);
        pool = new JedisPool(new JedisPoolConfig(), url.getHost(), url.getPort());
    }
}
```
I see the construct method used `JedisPool`, 
**if cluster ，how should  do？**

}
    public String getVersion() {
        return version;
    }
    public void setVersion(String version) {
        this.version = version;
    }
    public String getGroup() {
        return group;
    }
    public void setGroup(String group) {
        this.group = group;
    }
    public String getSide() {
        return side;
    }
    public void setSide(String side) {
        this.side = side;
    }
    public String getApplication() {
        return application;
    }
    public void setApplication(String application) {
        this.application = application;
    }
    public static enum KeyTypeEnum {
        PATH, UNIQUE_KEY
    }
}