Exception in thread "main" java.lang.IllegalArgumentException: Some primary key columns are missing

Exception in thread "main" java.lang.IllegalArgumentException: Some primary key columns are missing in RDD or have not been selected:sockpuppetuser

我的类定义如下：

private static class IPSockpuppetUser{
        private String ip;
        private String sockpuppetUser;
        .......

使用如下语句将这个类的信息保存到cassandra：

javaFunctions(ipScockpuppetStream).writerBuilder("ks", "ipsockpuppetuser", mapToRow(IPSockpuppetUser.class)).saveToCassandra();

运行的时候报这个错误：

Exception in thread "main" java.lang.IllegalArgumentException: Some primary key columns are missing in RDD or have not been selected:sockpuppetuser

原因是在往cassandra写数据的时候，会将sockpuppetUser成员映射成cassandra表ipsockpuppetuser的sockpuppetUser列，但是cassandra是不区分大小写的，所以java代码找不到这一列，所以报错了

解决办法：将sockpuppetUser属性定义为sockpuppetuser