@Override
  public int hashCode() {
    return getServerName().hashCode();
  }
For internal use only.
@param hostName  the name of the host to use
@param port      the port on the host to use
@param startCode the startcode to use for formatting
@return Server name made of the concatenation of hostname, port and startcode formatted as
        <code>&lt;hostname&gt; ',' &lt;port&gt; ',' &lt;startcode&gt;</code>
hbase-common/src/main/java/org/apache/hadoop/hbase/ServerName.java