title: Code: 210. DB::NetException: Connection refused (localhost:9000)
body: <p>unable to connect to the client,following is the error</p>
  
  <pre><code>root@abcC:~# clickhouse-server client ClickHouse client version
  20.1.4.14 (official build). Connecting to localhost:9000 as user default.
  **Code: 210. DB::NetException: Connection refused (localhost:9000)**
  </code></pre>