How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

sakura99 — Mon, 05 Oct 2020 14:22:19 GMT

Halo, I have been facing talend issue like this:

WARN ]: org.apache.spark.scheduler.TaskSetManager - Lost task 0.0 in stage 0.0 (TID 0, xxx.com, executor 1): java.io.IOException: java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1381)

at org.apache.spark.rdd.ParallelCollectionPartition.readObject(ParallelCollectionRDD.scala:70)

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:1170)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2177)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2068)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1572)

at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2286)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2210)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2068)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1572)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430)

at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75)

at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114)

at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:375)

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)

Caused by: java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

at org.apache.spark.rdd.ParallelCollectionPartition$$anonfun$readObject$1$$anonfun$apply$mcV$sp$2.apply(ParallelCollectionRDD.scala:80)

at org.apache.spark.util.Utils$.deserializeViaNestedStream(Utils.scala:211)

at org.apache.spark.rdd.ParallelCollectionPartition$$anonfun$readObject$1.apply$mcV$sp(ParallelCollectionRDD.scala:80)

at org.apache.spark.rdd.ParallelCollectionPartition$$anonfun$readObject$1.apply(ParallelCollectionRDD.scala:70)

at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1374)

... 20 more

[ERROR]: org.apache.spark.scheduler.TaskSetManager - Task 0 in stage 0.0 failed 4 times; aborting job

anyone have a idea of what happens here? Can we fix this problem with adding parameter in talend or something?

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

Anonymous — Mon, 19 Oct 2020 03:38:39 GMT

Hello,

Is there any detailed steps to repro your issue? What does your job look like? Could you upload the screenshot of your job?

Best regards

Sabrina

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

sakura99 — Sun, 01 Nov 2020 08:46:47 GMT

Dear Sabrina,

thank you for your time. I already reinstall my talend and the issue was solved.

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

Anonymous — Mon, 02 Nov 2020 03:32:41 GMT

Hello,

Thanks for your feedback and letting us know you have resolved this issue by yourself.

Best regards

Sabrina

topic Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq in Talend Studio

How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq

Re: How to set parameter java.lang.ClassCastException: scala.None$ cannot be cast to scala.collection.Seq