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Posted to commits@beam.apache.org by "ethanhunt999 (JIRA)" <ji...@apache.org> on 2017/12/27 06:43:00 UTC
[jira] [Updated] (BEAM-3394) Trying to run Apache Beam
2.3.0-SNAPSHOT pipeline on Spark 2.2.1 standalone cluster and I am facing
some ClassCastException.
[ https://issues.apache.org/jira/browse/BEAM-3394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ethanhunt999 updated BEAM-3394:
-------------------------------
Description:
As Jira Issue for [Spark 2.x support in Spark runner](https://issues.apache.org/jira/browse/BEAM-1920) is resolved, Now I am able to execute pipeline in Local mode successfully. But if am trying to run on Spark standalone cluster its showing some _ClassCastException_
Here is some tech versioning details which am currently using may be will helpful to you:
-Scala 2.11.8
-Spark 2.2.1
-Apache Beam 2.3.0-SNAPSHOT
Here is the full trace for error
{noformat}
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:2233)
at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2288)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
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.ShuffleMapTask.runTask(ShuffleMapTask.scala:85)
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:338)
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)
{noformat}
was:
As Jira Issue for [Spark 2.x support in Spark runner](https://issues.apache.org/jira/browse/BEAM-1920) is resolved, Now I am able to execute pipeline in Local mode successfully. But if am trying to run on Spark standalone cluster its showing some _ClassCastException_
Here is some tech versioning details which am currently using may be will helpful to you:
-Scala 2.11.8
-Spark 2.2.1
-Apache Beam 2.3.0-SNAPSHOT
Here is the full trace for error
<prev>
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$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233)
at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2288)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
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.ShuffleMapTask.runTask(ShuffleMapTask.scala:85)
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$TaskRunner.run(Executor.scala:338)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
</prev>
> Trying to run Apache Beam 2.3.0-SNAPSHOT pipeline on Spark 2.2.1 standalone cluster and I am facing some ClassCastException.
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-3394
> URL: https://issues.apache.org/jira/browse/BEAM-3394
> Project: Beam
> Issue Type: Bug
> Components: beam-model, runner-spark
> Affects Versions: 2.3.0
> Reporter: ethanhunt999
> Assignee: Jean-Baptiste Onofré
>
> As Jira Issue for [Spark 2.x support in Spark runner](https://issues.apache.org/jira/browse/BEAM-1920) is resolved, Now I am able to execute pipeline in Local mode successfully. But if am trying to run on Spark standalone cluster its showing some _ClassCastException_
> Here is some tech versioning details which am currently using may be will helpful to you:
> -Scala 2.11.8
> -Spark 2.2.1
> -Apache Beam 2.3.0-SNAPSHOT
> Here is the full trace for error
> {noformat}
> 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$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233)
> at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2288)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> at scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
> 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.ShuffleMapTask.runTask(ShuffleMapTask.scala:85)
> 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$TaskRunner.run(Executor.scala:338)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
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