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From Koert Kuipers <ko...@tresata.com>
Subject Re: java serialization errors with spark.files.userClassPathFirst=true
Date Fri, 16 May 2014 18:25:52 GMT
well, i modified ChildExecutorURLClassLoader to also delegate to
parentClassloader if NoClassDefFoundError is thrown... now i get yet
another error. i am clearly missing something with these classloaders. such
nasty stuff... giving up for now. just going to have to not use
spark.files.userClassPathFirst=true for now, until i have more time to look
at this.

14/05/16 13:58:59 ERROR Executor: Exception in task ID 3
java.lang.ClassCastException: cannot assign instance of scala.None$ to
field org.apache.spark.rdd.RDD.checkpointData of type scala.Option in
instance of MyRDD
        at
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2083)
        at
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1261)
        at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1995)
        at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)
        at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
        at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
        at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1989)
        at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)
        at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
        at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at
scala.collection.immutable.$colon$colon.readObject(List.scala:362)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
        at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1891)
        at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
        at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
        at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1989)
        at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)
        at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
        at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at
org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:60)



On Fri, May 16, 2014 at 1:46 PM, Koert Kuipers <koert@tresata.com> wrote:

> after removing all class paramater of class Path from my code, i tried
> again. different but related eror when i set
> spark.files.userClassPathFirst=true
>
> now i dont even use FileInputFormat directly. HadoopRDD does...
>
> 14/05/16 12:17:17 ERROR Executor: Exception in task ID 45
> java.lang.NoClassDefFoundError: org/apache/hadoop/mapred/FileInputFormat
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
>         at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
>         at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
>         at
> org.apache.spark.executor.ChildExecutorURLClassLoader$userClassLoader$.findClass(ExecutorURLClassLoader.scala:42)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>         at
> org.apache.spark.executor.ChildExecutorURLClassLoader.findClass(ExecutorURLClassLoader.scala:51)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:270)
>         at
> org.apache.spark.serializer.JavaDeserializationStream$$anon$1.resolveClass(JavaSerializer.scala:57)
>         at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1610)
>         at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515)
>         at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1481)
>         at
> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1331)
>         at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1989)
>         at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)
>         at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
>         at
> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
>         at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1989)
>         at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)
>         at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
>         at
> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
>         at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
>         at
> scala.collection.immutable.$colon$colon.readObject(List.scala:362)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
>         at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1891)
>         at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
>         at
> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
>
>
>
> On Thu, May 15, 2014 at 3:03 PM, Koert Kuipers <koert@tresata.com> wrote:
>
>> when i set spark.files.userClassPathFirst=true, i get java serialization
>> errors in my tasks, see below. when i set userClassPathFirst back to its
>> default of false, the serialization errors are gone. my spark.serializer is
>> KryoSerializer.
>>
>> the class org.apache.hadoop.fs.Path is in the spark assembly jar, but not
>> in my task jars (the ones i added to the SparkConf). so looks like the
>> ClosureSerializer is having trouble with this class once the
>> ChildExecutorURLClassLoader is used? thats me just guessing.
>>
>> Exception in thread "main" org.apache.spark.SparkException: Job aborted
>> due to stage failure: Task 1.0:5 failed 4 times, most recent failure:
>> Exception failure in TID 31 on host node05.tresata.com:
>> java.lang.NoClassDefFoundError: org/apache/hadoop/fs/Path
>>         java.lang.Class.getDeclaredConstructors0(Native Method)
>>         java.lang.Class.privateGetDeclaredConstructors(Class.java:2398)
>>         java.lang.Class.getDeclaredConstructors(Class.java:1838)
>>
>> java.io.ObjectStreamClass.computeDefaultSUID(ObjectStreamClass.java:1697)
>>         java.io.ObjectStreamClass.access$100(ObjectStreamClass.java:50)
>>         java.io.ObjectStreamClass$1.run(ObjectStreamClass.java:203)
>>         java.security.AccessController.doPrivileged(Native Method)
>>
>> java.io.ObjectStreamClass.getSerialVersionUID(ObjectStreamClass.java:200)
>>         java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:556)
>>
>> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1580)
>>
>> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1493)
>>
>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1729)
>>         java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1326)
>>
>> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1950)
>>
>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1874)
>>
>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1756)
>>         java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1326)
>>         java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>>         scala.collection.immutable.$colon$colon.readObject(List.scala:362)
>>         sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>         java.lang.reflect.Method.invoke(Method.java:597)
>>
>> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
>>
>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1852)
>>
>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1756)
>>         java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1326)
>>
>> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1950)
>>
>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1874)
>>
>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1756)
>>         java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1326)
>>         java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>>
>> org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:60)
>>
>> org.apache.spark.scheduler.ShuffleMapTask$.deserializeInfo(ShuffleMapTask.scala:66)
>>
>> org.apache.spark.scheduler.ShuffleMapTask.readExternal(ShuffleMapTask.scala:139)
>>
>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1795)
>>
>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1754)
>>         java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1326)
>>         java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>>
>> org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:60)
>>
>> org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:82)
>>
>> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:190)
>>
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>>
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>>         java.lang.Thread.run(Thread.java:662)
>>
>>
>

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