case class doesn't work in spark interpreter

import org.apache.commons.io.IOUtils
import java.net.URL
import java.nio.charset.Charset// Zeppelin creates and injects sc (SparkContext) and sqlContext (HiveContext or SqlContext)
// So you don't need create them manually// load bank data
val bankText = sc.parallelize(
    IOUtils.toString(
        new URL("https://s3.amazonaws.com/apache-zeppelin/tutorial/bank/bank.csv"),
        Charset.forName("utf8")).split("\n"))case class Bank(age: Integer, job: String, marital: String, education: String, balance: Integer)val bank = bankText.map(s => s.split(";")).filter(s => s(0) != "\"age\"").map(
    s => Bank(s(0).toInt, 
            s(1).replaceAll("\"", ""),
            s(2).replaceAll("\"", ""),
            s(3).replaceAll("\"", ""),
            s(5).replaceAll("\"", "").toInt
        )
)

bank.collect()
 

org.apache.spark.SparkDriverExecutionException: Execution error
  at org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:1690)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:2588)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2533)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2522)
  at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:49)
  at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:898)
  at org.apache.spark.SparkContext.runJob(SparkContext.scala:2214)
  at org.apache.spark.SparkContext.runJob(SparkContext.scala:2235)
  at org.apache.spark.SparkContext.runJob(SparkContext.scala:2254)
  at org.apache.spark.SparkContext.runJob(SparkContext.scala:2279)
  at org.apache.spark.rdd.RDD.$anonfun$collect$1(RDD.scala:1030)
  at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
  at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
  at org.apache.spark.rdd.RDD.withScope(RDD.scala:414)
  at org.apache.spark.rdd.RDD.collect(RDD.scala:1029)
  ... 44 elided
Caused by: java.lang.ArrayStoreException: [LBank;
  at scala.runtime.ScalaRunTime$.array_update(ScalaRunTime.scala:74)
  at org.apache.spark.SparkContext.$anonfun$runJob$4(SparkContext.scala:2235)
  at org.apache.spark.SparkContext.$anonfun$runJob$4$adapted(SparkContext.scala:2235)
  at org.apache.spark.scheduler.JobWaiter.taskSucceeded(JobWaiter.scala:59)
  at org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:1686)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:2588)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2533)
  at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2522)
  at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:49)