vert.x WebClient握手与使用letEncrypt证书的主机失败

Question

尝试在JVM 1.8.0_152上使用vert.x 3.7.1连接到使用LetsEncrypt证书的https服务器。虽然有效，例如使用www.google.com时，我得到javax.net.ssl.SSLException：收到致命警报：handshake_failure

我的代码：

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import io.vertx.core.AbstractVerticle;
import io.vertx.core.Vertx;
import io.vertx.ext.web.client.WebClient;
import io.vertx.ext.web.client.WebClientOptions;

public class ClientTest extends AbstractVerticle {

    private WebClient webClient;

    public static void main(String[] args) {
        //Runner.runVerticle(ClientTest.class.getName(), true);
        Vertx vertx = Vertx.vertx();
        ClientTest clientTest = new ClientTest();
        vertx.deployVerticle(clientTest);
    }

    @Override
    public void start() {
        WebClientOptions clientOptions = new WebClientOptions()
                .setMaxInitialLineLength(10000).setLogActivity(true)
                .setTryUseCompression(true).setSsl(true).setTrustAll(true)
                .setVerifyHost(false);

        webClient = WebClient.create(vertx, clientOptions); 
        Set<String> hostList = new HashSet<>(Arrays.asList("www.wissel.net","www.google.com"));

        hostList.forEach(host -> {
            System.out.println("Connecting to "+host);
            webClient.get(443, host, "/")
            .send(ar -> {
                if (ar.failed()) {
                    ar.cause().printStackTrace();
                } else {
                    System.out.println(host+" returnCode:"+ ar.result().statusCode());
                }
            });
        });

    }   
}

我正在尝试在Mac上运行它。 我想念什么？