Invalid Class Exception

Fri, 23 May 2014 15:21:13 -0700 

Hi,

I get the following exception when using Spark to run various programs.
java.io.InvalidClassException: org.apache.spark.SerializableWritable; local class incompatible: stream classdesc serialVersionUID = 6301214776158303468, local class serialVersionUID = -7785455416944904980 at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:604) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1601) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40) at org.apache.spark.broadcast.HttpBroadcast$.read(HttpBroadcast.scala:165) at org.apache.spark.broadcast.HttpBroadcast.readObject(HttpBroadcast.scala:56) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at scala.collection.immutable.$colon$colon.readObject(List.scala:362) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at scala.collection.immutable.$colon$colon.readObject(List.scala:362) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40) at org.apache.spark.scheduler.ResultTask$.deserializeInfo(ResultTask.scala:63) at org.apache.spark.scheduler.ResultTask.readExternal(ResultTask.scala:139) at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40) at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:62) at org.apache.spark.executor.Executor$TaskRunner$$anonfun$run$1.apply$mcV$sp(Executor.scala:193) at org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:42) at org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:41) 
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.spark.deploy.SparkHadoopUtil.runAsUser(SparkHadoopUtil.scala:41) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:176) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
        at java.lang.Thread.run(Thread.java:722)

What is the cause of this exception?

Thanks,
Suman.

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