我正在尝试使用Zeppelin在Flink(Scala(中开发K-Means模型。这是我简单代码的一部分：
//Reading data
val mapped : DataSet[Vector] = data.map {x => DenseVector (x._1,x._2) }
//Create algorithm
val knn = KNN()
.setK(3)
.setBlocks(10)
.setDistanceMetric(SquaredEuclideanDistanceMetric())
.setUseQuadTree(false)
.setSizeHint(CrossHint.SECOND_IS_SMALL)
...
//Just to learn I use the same data predicting the model
val result = knn.predict(mapped).collect()
当我打印数据或使用预测方法时，我得到了此错误：
org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Job execution failed.
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:409)
at org.apache.flink.client.program.StandaloneClusterClient.submitJob(StandaloneClusterClient.java:95)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:382)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:369)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:344)
at org.apache.flink.client.RemoteExecutor.executePlanWithJars(RemoteExecutor.java:211)
at org.apache.flink.client.RemoteExecutor.executePlan(RemoteExecutor.java:188)
at org.apache.flink.api.java.RemoteEnvironment.execute(RemoteEnvironment.java:172)
at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:896)
at org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:637)
at org.apache.flink.api.scala.DataSet.collect(DataSet.scala:547)
... 36 elided
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply$mcV$sp(JobManager.scala:822)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:768)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:768)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: org.apache.flink.api.common.io.ParseException: Line could not be parsed: '-6.59 -44.68'
ParserError NUMERIC_VALUE_FORMAT_ERROR
Expect field types: class java.lang.Double, class java.lang.Double
in file: /home/borja/flink/kmeans/points
at org.apache.flink.api.common.io.GenericCsvInputFormat.parseRecord(GenericCsvInputFormat.java:407)
at org.apache.flink.api.java.io.CsvInputFormat.readRecord(CsvInputFormat.java:110)
at org.apache.flink.api.common.io.DelimitedInputFormat.nextRecord(DelimitedInputFormat.java:470)
at org.apache.flink.api.java.io.CsvInputFormat.nextRecord(CsvInputFormat.java:78)
at org.apache.flink.runtime.operators.DataSourceTask.invoke(DataSourceTask.java:162)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:585)
at java.lang.Thread.run(Thread.java:748)
我不知道是我的错误加载数据还是与类似的数据有关。
感谢您的帮助！：(
您尚未向我们显示您使用的代码来读取和解析数据，这是发生错误的地方。但是，鉴于错误消息，我会危害一个猜测您正在使用readcsvfile和由空格或选项卡界定的数据，并且没有指定fieldDelimiter(默认为逗号(。如果是这种情况，请参见有关如何配置CSV解析器的文档。