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 <ko...@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 <ko...@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) >> >> >