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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2015/08/27 08:13:46 UTC
[jira] [Resolved] (SPARK-10251) Some internal spark classes are not
registered with kryo
[ https://issues.apache.org/jira/browse/SPARK-10251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Reynold Xin resolved SPARK-10251.
---------------------------------
Resolution: Fixed
Fix Version/s: 1.6.0
> Some internal spark classes are not registered with kryo
> --------------------------------------------------------
>
> Key: SPARK-10251
> URL: https://issues.apache.org/jira/browse/SPARK-10251
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.4.1
> Reporter: Soren Macbeth
> Assignee: Ram Sriharsha
> Fix For: 1.6.0
>
>
> When running a job using kryo serialization and setting `spark.kryo.registrationRequired=true` some internal classes are not registered, causing the job to die. This is still a problem when this setting is false (which is the default) because it makes the space required to store serialized objects in memory or disk much much more expensive in terms of runtime and storage space.
> {code}
> 15/08/25 20:28:21 WARN spark.scheduler.TaskSetManager: Lost task 0.0 in stage 0.0 (TID 0, a.b.c.d): java.lang.IllegalArgumentException: Class is not registered: scala.Tuple2[]
> Note: To register this class use: kryo.register(scala.Tuple2[].class);
> at com.esotericsoftware.kryo.Kryo.getRegistration(Kryo.java:442)
> at com.esotericsoftware.kryo.util.DefaultClassResolver.writeClass(DefaultClassResolver.java:79)
> at com.esotericsoftware.kryo.Kryo.writeClass(Kryo.java:472)
> at com.esotericsoftware.kryo.Kryo.writeClassAndObject(Kryo.java:565)
> at org.apache.spark.serializer.KryoSerializerInstance.serialize(KryoSerializer.scala:250)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:236)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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