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Russell Alexander Spitzer commented on SPARK-6069: -------------------------------------------------- We've seen the same issue while developing the Spark Cassandra Connector. Unless the connector lib is loaded via spark.executor.extraClassPath, kryoSerializaition for joins always returns a classNotFound even though all operations which don't require a shuffle are fine. {code} com.esotericsoftware.kryo.KryoException: Unable to find class: org.apache.spark.sql.cassandra.CassandraSQLRow at com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:138) at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:115) at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:610) at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:721) at com.twitter.chill.Tuple2Serializer.read(TupleSerializers.scala:42) at com.twitter.chill.Tuple2Serializer.read(TupleSerializers.scala:33) at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:732) at org.apache.spark.serializer.KryoDeserializationStream.readObject(KryoSerializer.scala:144) at org.apache.spark.serializer.DeserializationStream$$anon$1.getNext(Serializer.scala:133) at org.apache.spark.util.NextIterator.hasNext(NextIterator.scala:71) at org.apache.spark.util.CompletionIterator.hasNext(CompletionIterator.scala:32) at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371) at org.apache.spark.util.CompletionIterator.hasNext(CompletionIterator.scala:32) at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39) at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) at org.apache.spark.sql.execution.joins.HashedRelation$.apply(HashedRelation.scala:80) at org.apache.spark.sql.execution.joins.ShuffledHashJoin$$anonfun$execute$1.apply(ShuffledHashJoin.scala:46) at org.apache.spark.sql.execution.joins.ShuffledHashJoin$$anonfun$execute$1.apply(ShuffledHashJoin.scala:45) at org.apache.spark.rdd.ZippedPartitionsRDD2.compute(ZippedPartitionsRDD.scala:88) at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:280) at org.apache.spark.rdd.RDD.iterator(RDD.scala:247) at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35) at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:280) at org.apache.spark.rdd.RDD.iterator(RDD.scala:247) at org.apache.spark.rdd.MappedRDD.compute(MappedRDD.scala:31) at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:280) at org.apache.spark.rdd.RDD.iterator(RDD.scala:247) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61) at org.apache.spark.scheduler.Task.run(Task.scala:56) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:200) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) {code} Adding the jar to executorExtraClasspath rather than --jars solves the issue. > Deserialization Error ClassNotFoundException with Kryo, Guava 14 > ---------------------------------------------------------------- > > Key: SPARK-6069 > URL: https://issues.apache.org/jira/browse/SPARK-6069 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 1.2.1 > Environment: Standalone one worker cluster on localhost, or any > cluster > Reporter: Pat Ferrel > Priority: Critical > > A class is contained in the jars passed in when creating a context. It is > registered with kryo. The class (Guava HashBiMap) is created correctly from > an RDD and broadcast but the deserialization fails with ClassNotFound. > The work around is to hard code the path to the jar and make it available on > all workers. Hard code because we are creating a library so there is no easy > way to pass in to the app something like: > spark.executor.extraClassPath /path/to/some.jar -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org