title: Failed to obtain R2DBC Connection Java Spring
body: <p>I am getting following exeption connecting to Mssql Server.</p>
  <pre><code>&gt; org.springframework.dao.DataAccessResourceFailureException: Failed to obtain R2DBC Connection; nested exception is java.net.UnknownHostException: failed to resolve '' after 10 queries 
      at org.springframework.r2dbc.connection.ConnectionFactoryUtils.lambda$getConnection$0(ConnectionFactoryUtils.java:88) ~[spring-r2dbc-5.3.2.jar:5.3.2]
      Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
  Error has been observed at the following site(s):
      |_ checkpoint ⇢ Handler com.reactive.testreactive.controller.TestStreamController#findAll() [DispatcherHandler]
      |_ checkpoint ⇢ HTTP GET &quot;/test&quot; [ExceptionHandlingWebHandler]
  </code></pre>
  <p>I connected to JDBC with the same configuration in properties but having an issue while trying to connect to R2DBC. Happens on rest and not on starting an app.</p>
  <pre><code>   @Bean
  public MssqlConnectionFactory connectionFactory() {
      return new MssqlConnectionFactory(MssqlConnectionConfiguration.builder()
              .host(&quot;host&quot;)
              .port(1433)
              .database(&quot;DataBase&quot;)
              .username(&quot;username&quot;)
              .password(&quot;password&quot;)
              .build());
  }
  </code></pre>