sqoop2编码报错，getStringInput抛出 Config do not exist - config name: linkConfig

代码和报错如下

代码片段：

 public static void main(String[] args) throws Exception {
    //String ip = "137.0.253.6";
    String url = "http://137.0.253.70:12000/sqoop/";
    SqoopClient client = new SqoopClient(url);

    //1 源端连接
    // long connectorId = 1;
    MLink fromLink = client.createLink("oracle-jdbc-connector");
    fromLink.setName("jdbcLink");
    fromLink.setCreationUser("Buffy");
    MLinkConfig fLinkConfig = fromLink.getConnectorLinkConfig();
    // 填入连接配置的值
    fLinkConfig.getStringInput("linkConfig.connectionString").setValue("jdbc:oracle:thin:@136.10.223.14:1921:cm");

报错：
Caused by: org.apache.sqoop.common.SqoopException: MODEL_010:Config do not exist - config name: linkConfig

配置中没有“linkConfig”，检查一下