The MetaCost operator fails to run when the Linear Discriminant Analysis operator is used as the base learner.
The following Stack Trace is generated in the Debug Mode:
- Exception: java.lang.NullPointerException
- Message: null
- Stack trace:
- com.rapidminer.example.table.DataRow.set(DataRow.java:84)
- com.rapidminer.belt.table.ConvertOnWriteExampleTable$1$1.set(ConvertOnWriteExampleTable.java:188)
- com.rapidminer.example.table.AbstractAttribute.setValue(AbstractAttribute.java:192)
- com.rapidminer.example.table.DataRow.set(DataRow.java:84)
- com.rapidminer.example.Example.setValue(Example.java:142)
- com.rapidminer.example.Example.setConfidence(Example.java:214)
- com.rapidminer.operator.learner.meta.MetaCostModel.performPrediction(MetaCostModel.java:156)
- com.rapidminer.operator.learner.PredictionModel.apply(PredictionModel.java:117)
- com.rapidminer.operator.AbstractModel.apply(AbstractModel.java:82)
- com.rapidminer.operator.AbstractModel.apply(AbstractModel.java:34)
- com.rapidminer.operator.ModelApplier.applyModel(ModelApplier.java:140)
- com.rapidminer.operator.ModelApplier.doWork(ModelApplier.java:125)
- com.rapidminer.operator.Operator.execute(Operator.java:1023)
- com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:77)
- com.rapidminer.operator.ExecutionUnit$2.run(ExecutionUnit.java:805)
- com.rapidminer.operator.ExecutionUnit$2.run(ExecutionUnit.java:800)
- java.security.AccessController.doPrivileged(Native Method)
- com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:800)
- com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:423)
- com.rapidminer.operator.Operator.execute(Operator.java:1023)
- com.rapidminer.Process.executeRoot(Process.java:1464)
- com.rapidminer.Process.lambda$executeRootInPool$5(Process.java:1443)
- com.rapidminer.studio.concurrency.internal.AbstractConcurrencyContext$AdaptedCallable.exec(AbstractConcurrencyContext.java:362)
- java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
- java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
- java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
- java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
