Hi, I’m following the directions to run the cassandra example “org.apache.spark.examples.CassandraTest” and I get this error
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected at org.apache.cassandra.hadoop.AbstractColumnFamilyInputFormat.getSplits(AbstractColumnFamilyInputFormat.java:113) at org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:90) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:204) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:202) at scala.Option.getOrElse(Option.scala:120) at org.apache.spark.rdd.RDD.partitions(RDD.scala:202) at org.apache.spark.rdd.MappedRDD.getPartitions(MappedRDD.scala:28) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:204) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:202) at scala.Option.getOrElse(Option.scala:120) at org.apache.spark.rdd.RDD.partitions(RDD.scala:202) at org.apache.spark.rdd.FlatMappedRDD.getPartitions(FlatMappedRDD.scala:30) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:204) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:202) at scala.Option.getOrElse(Option.scala:120) at org.apache.spark.rdd.RDD.partitions(RDD.scala:202) at org.apache.spark.rdd.MappedRDD.getPartitions(MappedRDD.scala:28) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:204) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:202) at scala.Option.getOrElse(Option.scala:120) at org.apache.spark.rdd.RDD.partitions(RDD.scala:202) at org.apache.spark.Partitioner$.defaultPartitioner(Partitioner.scala:59) at org.apache.spark.rdd.PairRDDFunctions.reduceByKey(PairRDDFunctions.scala:370) at org.apache.spark.examples.CassandraTest$.main(CassandraTest.scala:100) at org.apache.spark.examples.CassandraTest.main(CassandraTest.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:292) at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:55) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) I’m running Cassandra version 2.0.6, and this comes from the spark-1.0.0-bin-hadoop2 distribution package. I am running the example with this commandline: bin/run-example org.apache.spark.examples.CassandraTest localhost localhost 9160 I suspect it’s because I’m running the wrong version of Cassandra, but I can’t find the correct version listed anywhere. I hope this is an easy issue to address. Much thanks, Tim