javasparkmllib:有一个错误“error owlqn:failure!重置历史:breeze.optimize.nanhistory:“用于ml库中的logistic回归

zfycwa2u  于 2021-05-29  发布在  Hadoop
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我刚刚尝试使用apachesparkml库进行logistic回归,但每次尝试时都会出现一条错误消息,例如
“错误:失败!重置历史记录:breeze.optimize.nanhistory:“
logistic回归的数据集示例如下:

+-----+---------+---------+---------+--------+-------------+
|state|dayOfWeek|hourOfDay|minOfHour|secOfMin|     features|
+-----+---------+---------+---------+--------+-------------+
|  1.0|      7.0|      0.0|      0.0|     0.0|(4,[0],[7.0])|

逻辑回归的代码如下:

//Data Set
StructType schema = new StructType(
new StructField[]{
    new StructField("state", DataTypes.DoubleType, false, Metadata.empty()),
    new StructField("dayOfWeek", DataTypes.DoubleType, false, Metadata.empty()),
    new StructField("hourOfDay", DataTypes.DoubleType, false, Metadata.empty()),
    new StructField("minOfHour", DataTypes.DoubleType, false, Metadata.empty()),
    new StructField("secOfMin", DataTypes.DoubleType, false, Metadata.empty())
});
List<Row> dataFromRDD = bucketsForMLs.map(p -> {
    return RowFactory.create(p.label(), p.features().apply(0), p.features().apply(1), p.features().apply(2), p.features().apply(3));
}).collect();

Dataset<Row> stateDF = sparkSession.createDataFrame(dataFromRDD, schema);
String[] featureCols = new String[]{"dayOfWeek", "hourOfDay", "minOfHour", "secOfMin"};
VectorAssembler vectorAssembler = new VectorAssembler().setInputCols(featureCols).setOutputCol("features");
Dataset<Row> stateDFWithFeatures = vectorAssembler.transform(stateDF);

StringIndexer labelIndexer = new StringIndexer().setInputCol("state").setOutputCol("label");
Dataset<Row> stateDFWithLabelAndFeatures = labelIndexer.fit(stateDFWithFeatures).transform(stateDFWithFeatures);

MLRExecutionForDF mlrExe = new MLRExecutionForDF(javaSparkContext);
mlrExe.execute(stateDFWithLabelAndFeatures);

// Logistic Regression part
LogisticRegressionModel lrModel = new LogisticRegression().setMaxIter(maxItr).setRegParam(regParam).setElasticNetParam(elasticNetParam)  
// This part would occur error
.fit(stateDFWithLabelAndFeatures);
68bkxrlz

68bkxrlz1#

我也遇到了同样的错误。它来自breeze scalanlp软件包,spark刚刚进口。它说一些关于衍生产品的东西是不能产生的。
我不确定这到底意味着什么,但在我的数据集中,我可以说我使用的数据越少,抛出错误的频率就越高。这意味着,对于要训练的类来说,缺失特征的比例越高,错误发生的频率就越高。我认为这与由于缺少类的信息而无法正确优化有关。
否则,该错误似乎不会阻止代码运行。

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