pengdafu opened a new issue, #19443:
URL: https://github.com/apache/shardingsphere/issues/19443

   ## Question
   I tried to use cluster mode and use ETCD as the registry. 
   But I get an error using the following configuration.
   
   configuaration:
   
   ```yaml
   mode:
     type: Cluster
     repository:
       type: Etcd
       props:
         namespace: /shardingproxy
         server-lists: localhost:2379
         retryIntervalMilliseconds: 500
         timeToLiveSeconds: 60
         maxRetries: 3
         operationTimeoutMilliseconds: 500
     overwrite: false
   ```
   
   err log:
   ```shell
   [WARN ] 2022-07-21 19:39:09.943 [grpc-default-executor-0] 
i.e.jetcd.resolver.SmartNameResolver - Error wile getting list of servers
   io.etcd.jetcd.common.exception.EtcdException: Unable to resolve endpoints 
[localhost:2379]
        at 
io.etcd.jetcd.common.exception.EtcdExceptionFactory.newEtcdException(EtcdExceptionFactory.java:30)
        at 
io.etcd.jetcd.resolver.SmartNameResolver.doResolve(SmartNameResolver.java:137)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)
   七月 21, 2022 7:39:09 下午 
io.grpc.internal.ManagedChannelImpl$NameResolverListener 
handleErrorInSyncContext
   警告: [Channel<1>: (etcd)] Failed to resolve name. 
status=Status{code=NOT_FOUND, description=null, cause=null}
   ```
   
   Unless I use the following configuration to boot properly.
   ```yaml
   mode:
     type: Cluster
     repository:
       type: Etcd
       props:
         namespace: /shardingproxy
         server-lists: http://localhost:2379
         retryIntervalMilliseconds: 500
         timeToLiveSeconds: 60
         maxRetries: 3
         operationTimeoutMilliseconds: 500
     overwrite: false
   ```


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