java.util.NoSuchElementException：Cassandra Spark中的表demo.usertable中找不到列ID

Question

I am try to write RDD[CassandraRow] into existing Cassandra Table using Spark-cassandra-Connector. Here is my piece of code

val conf = new SparkConf().setAppName(getClass.getSimpleName)
            .setMaster("local[*]")
            .set("spark.cassandra.connection.host", host)
        val sc = new SparkContext("local[*]", keySpace, conf)
val rdd = sc.textFile("hdfs://hdfs-host:8020/Users.csv")
val columns = Array("ID", "FirstName", "LastName", "Email", "Country")
val types = Array("int", "string", "string", "string", "string")
val crdd=rdd.map(p => {
            var tokens = p.split(",")
            new CassandraRow(columns,tokens)
        })
val targetedColumns = SomeColumns.seqToSomeColumns(columns)
crdd.saveToCassandra(keySpace, tableName, targetedColumns,  WriteConf.fromSparkConf(conf))

When I run this code I get following exception

Exception in thread "main" java.util.NoSuchElementException: Column not found ID in table demo.usertable

here is actual schema of table

CREATE TABLE usertable (
  id int,
  country text,
  email text,
  firstname text,
  lastname text,
  PRIMARY KEY ((id))
)

Any suggestion? Thanks

Answer 1

Keyspace, table and column names are case sensitive in Cassandra. Have you tried adjusting your code to use the same case as the table definition? (For example use 'id' instead of 'ID').