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https://issues.apache.org/jira/browse/SPARK-26511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16734009#comment-16734009
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Hyukjin Kwon commented on SPARK-26511:
--------------------------------------
BTW, please make sure such facts are described in the JIRA first to prevent
such overhead.
> java.lang.ClassCastException error when loading Spark MLlib model from
> parquet file
> -----------------------------------------------------------------------------------
>
> Key: SPARK-26511
> URL: https://issues.apache.org/jira/browse/SPARK-26511
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Affects Versions: 2.4.0
> Reporter: Amy Koh
> Priority: Major
> Attachments: repro.zip
>
>
> When I tried to load a decision tree model from a parquet file, the following
> error is thrown.
> {code:bash}
> Py4JJavaError: An error occurred while calling
> z:org.apache.spark.mllib.tree.model.DecisionTreeModel.load. :
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in
> stage 2.0 failed 1 times, most recent failure: Lost task 0.0 in stage 2.0
> (TID 2, localhost, executor driver): java.lang.ClassCastException: class
> java.lang.Double cannot be cast to class java.lang.Integer (java.lang.Double
> and java.lang.Integer are in module java.base of loader 'bootstrap') at
> scala.runtime.BoxesRunTime.unboxToInt(BoxesRunTime.java:101) at
> org.apache.spark.sql.Row$class.getInt(Row.scala:223) at
> org.apache.spark.sql.catalyst.expressions.GenericRow.getInt(rows.scala:165)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$SplitData$.apply(DecisionTreeModel.scala:171)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$NodeData$.apply(DecisionTreeModel.scala:195)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$$anonfun$9.apply(DecisionTreeModel.scala:247)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$$anonfun$9.apply(DecisionTreeModel.scala:247)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:409) at
> scala.collection.Iterator$$anon$11.next(Iterator.scala:409) at
> org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:149)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96) at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53) at
> org.apache.spark.scheduler.Task.run(Task.scala:108) at
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:335) at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at java.base/java.lang.Thread.run(Thread.java:834) Driver stacktrace: at
> org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1499)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1487)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1486)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) at
> org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1486)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:814)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:814)
> at scala.Option.foreach(Option.scala:257) at
> org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:814)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1714)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1669)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1658)
> at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) at
> org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:630) at
> org.apache.spark.SparkContext.runJob(SparkContext.scala:2022) at
> org.apache.spark.SparkContext.runJob(SparkContext.scala:2043) at
> org.apache.spark.SparkContext.runJob(SparkContext.scala:2062) at
> org.apache.spark.SparkContext.runJob(SparkContext.scala:2087) at
> org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:936) at
> org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
> at
> org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
> at org.apache.spark.rdd.RDD.withScope(RDD.scala:362) at
> org.apache.spark.rdd.RDD.collect(RDD.scala:935) at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$.constructTrees(DecisionTreeModel.scala:262)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$.load(DecisionTreeModel.scala:249)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$.load(DecisionTreeModel.scala:326)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel.load(DecisionTreeModel.scala)
> at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method) at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566) at
> py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244) at
> py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357) at
> py4j.Gateway.invoke(Gateway.java:280) at
> py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at
> py4j.commands.CallCommand.execute(CallCommand.java:79) at
> py4j.GatewayConnection.run(GatewayConnection.java:214) at
> java.base/java.lang.Thread.run(Thread.java:834) Caused by:
> java.lang.ClassCastException: class java.lang.Double cannot be cast to class
> java.lang.Integer (java.lang.Double and java.lang.Integer are in module
> java.base of loader 'bootstrap') at
> scala.runtime.BoxesRunTime.unboxToInt(BoxesRunTime.java:101) at
> org.apache.spark.sql.Row$class.getInt(Row.scala:223) at
> org.apache.spark.sql.catalyst.expressions.GenericRow.getInt(rows.scala:165)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$SplitData$.apply(DecisionTreeModel.scala:171)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$NodeData$.apply(DecisionTreeModel.scala:195)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$$anonfun$9.apply(DecisionTreeModel.scala:247)
> at
> org.apache.spark.mllib.tree.model.DecisionTreeModel$SaveLoadV1_0$$anonfun$9.apply(DecisionTreeModel.scala:247)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:409) at
> scala.collection.Iterator$$anon$11.next(Iterator.scala:409) at
> org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:149)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96) at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53) at
> org.apache.spark.scheduler.Task.run(Task.scala:108) at
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:335) at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> ... 1 more
> {code}
> Reproduction steps as follow with reproduction files attached:
> {code:python}
> from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
> from pyspark.mllib.util import MLUtils
> from pyspark import SparkContext
> sc = SparkContext()
> model = DecisionTreeModel.load(spark, <modelFilePath>)
> {code}
>
>
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