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https://issues.apache.org/jira/browse/SPARK-23471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16379516#comment-16379516
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Liang-Chi Hsieh commented on SPARK-23471:
-----------------------------------------
I can't reproduce this. With `fit`, the params are copied and saved correctly.
> RandomForestClassificationModel save() - incorrect metadata
> -----------------------------------------------------------
>
> Key: SPARK-23471
> URL: https://issues.apache.org/jira/browse/SPARK-23471
> Project: Spark
> Issue Type: Bug
> Components: ML
> Affects Versions: 2.2.1
> Reporter: Keepun
> Priority: Major
>
> RandomForestClassificationMode.load() does not work after save()
> {code:java}
> RandomForestClassifier rf = new RandomForestClassifier()
> .setFeaturesCol("features")
> .setLabelCol("result")
> .setNumTrees(100)
> .setMaxDepth(30)
> .setMinInstancesPerNode(1)
> //.setCacheNodeIds(true)
> .setMaxMemoryInMB(500)
> .setSeed(System.currentTimeMillis() + System.nanoTime());
> RandomForestClassificationModel rfmodel = rf.train(data);
> try {
> rfmodel.save(args[2] + "." + System.currentTimeMillis());
> } catch (IOException e) {
> LOG.error(e.getMessage(), e);
> e.printStackTrace();
> }
> {code}
> File metadata\part-00000:
> {code:java}
> {"class":"org.apache.spark.ml.classification.RandomForestClassificationModel",
> "timestamp":1519136783983,"sparkVersion":"2.2.1","uid":"rfc_7c7e84ce7488",
> "paramMap":{"featureSubsetStrategy":"auto","cacheNodeIds":false,"impurity":"gini",
> "checkpointInterval":10,
> "numTrees":20,"maxDepth":5,
> "probabilityCol":"probability","labelCol":"label","featuresCol":"features",
> "maxMemoryInMB":256,"minInstancesPerNode":1,"subsamplingRate":1.0,
> "rawPredictionCol":"rawPrediction","predictionCol":"prediction","maxBins":32,
> "minInfoGain":0.0,"seed":-491520797},"numFeatures":1354,"numClasses":2,
> "numTrees":20}
> {code}
> should be:
> {code:java}
> "numTrees":100,"maxDepth":30,{code}
>
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