[jira] [Commented] (SPARK-21569) Internal Spark class needs to be kryo-registered

["YongGang Cao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-21569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16514529#comment-16514529 ] 

YongGang Cao commented on SPARK-21569:
--------------------------------------

seems this is not workaround-able, at least from java side. 

tried to register both of following in SparkConf, no luck, still get the not registered error message. 
{{}}
{code:java}
org.apache.spark.internal.io.FileCommitProtocol.TaskCommitMessage.class,
org.apache.spark.internal.io.FileCommitProtocol.TaskCommitMessage[].class{code}

> Internal Spark class needs to be kryo-registered
> ------------------------------------------------
>
>                 Key: SPARK-21569
>                 URL: https://issues.apache.org/jira/browse/SPARK-21569
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.2.0
>            Reporter: Ryan Williams
>            Priority: Major
>
> [Full repro here|https://github.com/ryan-williams/spark-bugs/tree/hf]
> As of 2.2.0, {{saveAsNewAPIHadoopFile}} jobs fail (when {{spark.kryo.registrationRequired=true}}) with:
> {code}
> java.lang.IllegalArgumentException: Class is not registered: org.apache.spark.internal.io.FileCommitProtocol$TaskCommitMessage
> Note: To register this class use: kryo.register(org.apache.spark.internal.io.FileCommitProtocol$TaskCommitMessage.class);
> 	at com.esotericsoftware.kryo.Kryo.getRegistration(Kryo.java:458)
> 	at com.esotericsoftware.kryo.util.DefaultClassResolver.writeClass(DefaultClassResolver.java:79)
> 	at com.esotericsoftware.kryo.Kryo.writeClass(Kryo.java:488)
> 	at com.esotericsoftware.kryo.Kryo.writeClassAndObject(Kryo.java:593)
> 	at org.apache.spark.serializer.KryoSerializerInstance.serialize(KryoSerializer.scala:315)
> 	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:383)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}
> This internal Spark class should be kryo-registered by Spark by default.
> This was not a problem in 2.1.1.



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