我正在尝试通过java客户端的身份验证连接到dse 5.1集群。我用的Cassandra驱动程序是

<dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-core</artifactId>
        <version>3.1.4</version>
    </dependency>

添加了一个简单的测试，尝试连接到特定的键空间：

@Test
public void testConnection() {
    String user = "****";
    String pswd = "*******";
    String host = "********"
    Cluster cluster = Cluster.builder().addContactPoints(host)
            .withPort(9042)
            .withCredentials(user.trim(), pswd.trim())
            .build();
    Session session = cluster.connect(QueryBuilder.quote("TestKS"));
    Assert.assertNotNull(session);
}

我的结局是 com.datastax.driver.core.exceptions.AuthenticationException 从终端，我可以用相同的凭据连接到此节点，但从java代码，我无法通过此异常。
堆栈跟踪

com.datastax.driver.core.exceptions.AuthenticationException: Authentication error on host /<host>:9042: Failed to login. Please re-try.
    at com.datastax.driver.core.Connection$8.apply(Connection.java:390)
    at com.datastax.driver.core.Connection$8.apply(Connection.java:359)
    at com.google.common.util.concurrent.AbstractTransformFuture$AsyncTransformFuture.doTransform(AbstractTransformFuture.java:211)

请告知我遗漏了什么。