Spark-java.lang.ClassCastException:无法分配scala.collection.immutable.List $ SerializationProxy的实例 [英] Spark - java.lang.ClassCastException: cannot assign instance of scala.collection.immutable.List$SerializationProxy
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问题描述
我有一个带有Schema的数据框:
I have a dataframe with Schema :
root
|-- QUERY: string (nullable = true)
|-- TYPE: string (nullable = true)
|-- DEVICE: string (nullable = true)
|-- PURCHASE_UNITS_SUM: double (nullable = true)
|-- CLICK_SUM: decimal(38,18) (nullable = true)
|-- IMPRESSION_COUNT: long (nullable = false)
|-- CLICK_THROUGH_RATE: decimal(38,2) (nullable = true)
|-- PURCHASE_RATE: double (nullable = true)
我正在尝试将某些列转换为地图(设备->列):
I am trying to convert some columns to map (device -> columns) :
val result = df.withColumn("CLICK_THROUGH_RATE_MAP",
map(col("DEVICE"), col("CLICK_THROUGH_RATE")))
.withColumn("PURCHASE_RATE_MAP",
map(col("DEVICE"), col("PURCHASE_RATE")))
.withColumn("PURCHASE_SUM_MAP",
map(col("DEVICE"), col("PURCHASE_UNITS_SUM")))
.withColumn("CLICK_SUM_MAP",
map(col("DEVICE"), col("CLICK_SUM")))
.withColumn("IMPRESSION_SUM_MAP",
map(col("DEVICE"), col("IMPRESSION_COUNT")))
.groupBy("QUERY", "TYPE")
.agg(collect_list("CLICK_THROUGH_RATE_MAP"),
collect_list("PURCHASE_RATE_MAP"),
collect_list("PURCHASE_SUM_MAP"),
collect_list("CLICK_SUM_MAP"),
collect_list("IMPRESSION_SUM_MAP"))
.as[(String, String,
Seq[Map[String, Double]],
Seq[Map[String, Double]],
Seq[Map[String, Double]],
Seq[Map[String, Double]],
Seq[Map[String, Double]])]
.map {
case (query, type, list1, list2, list3, list4, list5) =>
(query, type,
list1.reduce(_ ++ _),
list2.reduce(_ ++ _),
list3.reduce(_ ++ _),
list4.reduce(_ ++ _),
list5.reduce(_ ++ _))
}.
toDF("QUERY",
"TYPE",
"CLICK_THROUGH_RATE",
"PURCHASE_RATE",
"PURCHASE_UNITS",
"CLICKS",
"IMPRESSIONS")
}
这给了我-
root
|-- QUERY: string (nullable = true)
|-- TYPE: string (nullable = true)
|-- CLICK_THROUGH_RATE: map (nullable = true)
| |-- key: string
| |-- value: string (valueContainsNull = true)
|-- PURCHASE_RATE: map (nullable = true)
| |-- key: string
| |-- value: string (valueContainsNull = true)
|-- PURCHASE_UNITS: map (nullable = true)
| |-- key: string
| |-- value: string (valueContainsNull = true)
|-- CLICKS: map (nullable = true)
| |-- key: string
| |-- value: string (valueContainsNull = true)
|-- IMPRESSIONS: map (nullable = true)
| |-- key: string
| |-- value: string (valueContainsNull = true)
但是当我执行result.count时，我会收到此异常-
But when I do result.count, I am getting this exception -
org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 63.0 failed 4 times, most recent failure: Lost task 0.3 in stage 63.0 (TID 62365, ip-10-0-1-52.ec2.internal, executor 2): java.lang.ClassCastException: cannot assign instance of scala.collection.immutable.List$SerializationProxy to field org.apache.spark.rdd.RDD.org$apache$spark$rdd$RDD$$dependencies_ of type scala.collection.Seq in instance of org.apache.spark.rdd.MapPartitionsRDD
at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2287)
at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1417)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2347)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:490)
at sun.reflect.GeneratedMethodAccessor232.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2232)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75)
at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:83)
at org.apache.spark.scheduler.Task.run(Task.scala:123)
at org.apache.spark.executor.Executor$TaskRunner$$anonfun$10.apply(Executor.scala:408)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:414)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Driver stacktrace:
at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:2041)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:2029)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:2028)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:2028)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:966)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:966)
at scala.Option.foreach(Option.scala:257)
at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:966)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:2262)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2211)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:2200)
at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:49)
at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:777)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:2061)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:2082)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:2101)
at org.apache.spark.sql.execution.SparkPlan.executeTake(SparkPlan.scala:401)
at org.apache.spark.sql.execution.CollectLimitExec.executeCollect(limit.scala:38)
at org.apache.spark.sql.Dataset.org$apache$spark$sql$Dataset$$collectFromPlan(Dataset.scala:3389)
at org.apache.spark.sql.Dataset$$anonfun$head$1.apply(Dataset.scala:2550)
at org.apache.spark.sql.Dataset$$anonfun$head$1.apply(Dataset.scala:2550)
at org.apache.spark.sql.Dataset$$anonfun$52.apply(Dataset.scala:3370)
at org.apache.spark.sql.execution.SQLExecution$$anonfun$withNewExecutionId$1.apply(SQLExecution.scala:78)
at org.apache.spark.sql.execution.SQLExecution$.withSQLConfPropagated(SQLExecution.scala:125)
at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:73)
at org.apache.spark.sql.Dataset.withAction(Dataset.scala:3369)
at org.apache.spark.sql.Dataset.head(Dataset.scala:2550)
at org.apache.spark.sql.Dataset.take(Dataset.scala:2764)
at org.apache.spark.sql.Dataset.getRows(Dataset.scala:254)
at org.apache.spark.sql.Dataset.showString(Dataset.scala:291)
at org.apache.spark.sql.Dataset.show(Dataset.scala:753)
at org.apache.spark.sql.Dataset.show(Dataset.scala:730)
... 53 elided
Caused by: java.lang.ClassCastException: cannot assign instance of scala.collection.immutable.List$SerializationProxy to field org.apache.spark.rdd.RDD.org$apache$spark$rdd$RDD$$dependencies_ of type scala.collection.Seq in instance of org.apache.spark.rdd.MapPartitionsRDD
at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2287)
at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1417)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2347)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:490)
at sun.reflect.GeneratedMethodAccessor232.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2232)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2341)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2265)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2123)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75)
at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:83)
at org.apache.spark.scheduler.Task.run(Task.scala:123)
at org.apache.spark.executor.Executor$TaskRunner$$anonfun$10.apply(Executor.scala:408)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:414)
... 3 more
我做错什么了吗?
推荐答案
HashMap存在相同的问题.
There is the same problem with HashMap.
我在这里找到了解决方案: https://gist.github.com/ramn/5566596
I found the solution here : https://gist.github.com/ramn/5566596
您必须用新的类ObjectObjectStreamWithCustomClassLoader替换代码中的ObjectInputStream类
You have to replace the class ObjectInputStream in your code by a new class : ObjectInputStreamWithCustomClassLoader
class ObjectInputStreamWithCustomClassLoader(
fileInputStream: FileInputStream
) extends ObjectInputStream(fileInputStream) {
override def resolveClass(desc: java.io.ObjectStreamClass): Class[_] = {
try { Class.forName(desc.getName, false, getClass.getClassLoader) }
catch { case ex: ClassNotFoundException => super.resolveClass(desc) }
}
}
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