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Sun Rui commented on SPARK-2075: -------------------------------- I met the same issue. I had a post in the Spark user mailing list but it does not get archived in http://apache-spark-user-list.1001560.n3.nabble.com/, so I have to describe the issue here: Steps to reproduce: 1. Download the official pre-built Spark binary 1.1.1 at http://d3kbcqa49mib13.cloudfront.net/spark-1.1.1-bin-hadoop1.tgz 2. Launch the Spark cluster in pseudo cluster mode 3. A small scala APP which calls RDD.saveAsObjectFile() scalaVersion := "2.10.4" libraryDependencies ++= Seq( "org.apache.spark" %% "spark-core" % "1.1.1" ) val sc = new SparkContext(args(0), "test") //args[0] is the Spark master URI val rdd = sc.parallelize(List(1, 2, 3)) rdd.saveAsObjectFile("/tmp/mysaoftmp") sc.stop throws an exception as follows: [error] (run-main-0) org.apache.spark.SparkException: Job aborted due to stage failure: Task 1 in stage 0.0 failed 4 times, most recent failure: Lost task 1.3 in stage 0.0 (TID 6, ray-desktop.sh.intel.com): java.lang.ClassCastException: scala.Tuple2 cannot be cast to scala.collection.Iterator [error] org.apache.spark.rdd.RDD$$anonfun$13.apply(RDD.scala:596) [error] org.apache.spark.rdd.RDD$$anonfun$13.apply(RDD.scala:596) [error] org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35) [error] org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262) [error] org.apache.spark.rdd.RDD.iterator(RDD.scala:229) [error] org.apache.spark.rdd.MappedRDD.compute(MappedRDD.scala:31) [error] org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262) [error] org.apache.spark.rdd.RDD.iterator(RDD.scala:229) [error] org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:62) [error] org.apache.spark.scheduler.Task.run(Task.scala:54) [error] org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:178) [error] java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) [error] java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [error] java.lang.Thread.run(Thread.java:701) After investigation, I found that this is caused by bytecode incompatibility issue between RDD.class in spark-core_2.10-1.1.1.jar and the pre-built spark assembly respectively. This issue also happens with spark 1.1.0. > Anonymous classes are missing from Spark distribution > ----------------------------------------------------- > > Key: SPARK-2075 > URL: https://issues.apache.org/jira/browse/SPARK-2075 > Project: Spark > Issue Type: Bug > Components: Build, Spark Core > Affects Versions: 1.0.0 > Reporter: Paul R. Brown > Priority: Critical > > Running a job built against the Maven dep for 1.0.0 and the hadoop1 > distribution produces: > {code} > java.lang.ClassNotFoundException: > org.apache.spark.rdd.RDD$$anonfun$saveAsTextFile$1 > {code} > Here's what's in the Maven dep as of 1.0.0: > {code} > jar tvf > ~/.m2/repository/org/apache/spark/spark-core_2.10/1.0.0/spark-core_2.10-1.0.0.jar > | grep 'rdd/RDD' | grep 'saveAs' > 1519 Mon May 26 13:57:58 PDT 2014 > org/apache/spark/rdd/RDD$anonfun$saveAsTextFile$1.class > 1560 Mon May 26 13:57:58 PDT 2014 > org/apache/spark/rdd/RDD$anonfun$saveAsTextFile$2.class > {code} > And here's what's in the hadoop1 distribution: > {code} > jar tvf spark-assembly-1.0.0-hadoop1.0.4.jar| grep 'rdd/RDD' | grep 'saveAs' > {code} > I.e., it's not there. It is in the hadoop2 distribution: > {code} > jar tvf spark-assembly-1.0.0-hadoop2.2.0.jar| grep 'rdd/RDD' | grep 'saveAs' > 1519 Mon May 26 07:29:54 PDT 2014 > org/apache/spark/rdd/RDD$anonfun$saveAsTextFile$1.class > 1560 Mon May 26 07:29:54 PDT 2014 > org/apache/spark/rdd/RDD$anonfun$saveAsTextFile$2.class > {code} -- 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