Yyou need cassandra 1.2.6 for Spark examples —
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On Thu, Jun 5, 2014 at 12:02 AM, Tim Kellogg wrote:
> 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
