Question

我已经使用h2o大约三年了，这是我第一次遇到这种错误。我无法共享一个可重复的示例，因为我使用的是敏感数据，但数据集包含约20K观测值，R版本4.0.2，macOS Catalina 10.15.6，最新稳定版本h20 3.30.1.3。您能帮我理解错误吗？这是经过几分钟训练模型的结果（根据进度条完成了53％）：

java.lang.NullPointerException

java.lang.NullPointerException
    at hex.ModelMetrics.getMetricFromModelMetric(ModelMetrics.java:151)
    at ai.h2o.automl.leaderboard.Leaderboard.getMetrics(Leaderboard.java:558)
    at ai.h2o.automl.leaderboard.Leaderboard.updateModels(Leaderboard.java:422)
    at ai.h2o.automl.leaderboard.Leaderboard.lambda$addModels$0(Leaderboard.java:381)
    at ai.h2o.automl.leaderboard.Leaderboard.atomicUpdate(Leaderboard.java:442)
    at ai.h2o.automl.leaderboard.Leaderboard.addModels(Leaderboard.java:378)
    at ai.h2o.automl.leaderboard.Leaderboard.addModel(Leaderboard.java:459)
    at ai.h2o.automl.ModelingStepsExecutor.addModel(ModelingStepsExecutor.java:186)
    at ai.h2o.automl.ModelingStepsExecutor.monitor(ModelingStepsExecutor.java:163)
    at ai.h2o.automl.ModelingStepsExecutor.submit(ModelingStepsExecutor.java:82)
    at ai.h2o.automl.AutoML.learn(AutoML.java:604)
    at ai.h2o.automl.AutoML.run(AutoML.java:407)
    at ai.h2o.automl.H2OJob$1.compute2(H2OJob.java:33)
    at water.H2O$H2OCountedCompleter.compute(H2O.java:1563)
    at jsr166y.CountedCompleter.exec(CountedCompleter.java:468)
    at jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:263)
    at jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:974)
    at jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1477)
    at jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)

我有一种预感，如果我为training_frame和leaderboard_frame使用相同的数据输入，则会发生此错误。如果还有其他我可以分享的内容，可以帮助您了解此问题，请告诉我！谢谢。

使用H2O的AutoML训练时发生NullPointerException

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