4.x: can't connect to the cluster when first node is non-responsive

[dkropachev]

Since netty bootstrap.connect uses only first address of unresolved InetSocketAddress 4.x does not even try to connect to other when it fails.

Consider following test:

  @Test
  public void cannot_connect_if_first_node_is_unavailable() {
    // Reproduce case when first two dns record contains nodes that are unresponsive
    // With RESOLVE_CONTACT_POINTS set to false
    DriverConfigLoader loader =
        new DefaultProgrammaticDriverConfigLoaderBuilder()
            .withBoolean(TypedDriverOption.RESOLVE_CONTACT_POINTS.getRawOption(), false)
            .withBoolean(TypedDriverOption.RECONNECT_ON_INIT.getRawOption(), true)
            .withStringList(
                TypedDriverOption.CONTACT_POINTS.getRawOption(),
                Collections.singletonList("test.cluster.fake:9042"))
            .build();

    CqlSessionBuilder builder = new CqlSessionBuilder().withConfigLoader(loader);
    CqlSession session;
    try (CcmBridge ccmBridge = CcmBridge.builder().withNodes(3).withIpPrefix("127.0.1.").build()) {
      MultimapHostResolverProvider.removeResolverEntries("test.cluster.fake");
      MultimapHostResolverProvider.addResolverEntry(
          "test.cluster.fake", ccmBridge.getNodeIpAddress(11));
      MultimapHostResolverProvider.addResolverEntry(
          "test.cluster.fake", ccmBridge.getNodeIpAddress(2));
      MultimapHostResolverProvider.addResolverEntry(
          "test.cluster.fake", ccmBridge.getNodeIpAddress(3));
      ccmBridge.create();
      ccmBridge.start();
      session = builder.build();
      SimpleStatement statement =
          new SimpleStatementBuilder("SELECT * FROM system.local")
              .setTimeout(Duration.ofSeconds(3))
              .build();
      session.execute(statement);
      ccmBridge.stop(2);
      session.execute(statement);
    }
  }