[jira] [Created] (SPARK-2292) NullPointerException in JavaPairRDD.reduceByKey

["Bharath Ravi Kumar (JIRA)" <ji...@apache.org>]

Bharath Ravi Kumar created SPARK-2292:
-----------------------------------------

             Summary: NullPointerException in JavaPairRDD.reduceByKey
                 Key: SPARK-2292
                 URL: https://issues.apache.org/jira/browse/SPARK-2292
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 1.0.0
         Environment: Spark 1.0.0, Standalone with a single slave running with 4G memory allocation. The data file was 
            Reporter: Bharath Ravi Kumar


Invoking JavaPairRDD.reduceByKey results in an NPE:

14/06/26 21:05:35 WARN scheduler.TaskSetManager: Loss was due to java.lang.NullPointerException
java.lang.NullPointerException
	at org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:750)
	at org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:750)
	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
	at org.apache.spark.Aggregator.combineValuesByKey(Aggregator.scala:59)
	at org.apache.spark.rdd.PairRDDFunctions$$anonfun$1.apply(PairRDDFunctions.scala:96)
	at org.apache.spark.rdd.PairRDDFunctions$$anonfun$1.apply(PairRDDFunctions.scala:95)
	at org.apache.spark.rdd.RDD$$anonfun$14.apply(RDD.scala:582)
	at org.apache.spark.rdd.RDD$$anonfun$14.apply(RDD.scala:582)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:158)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99)
	at org.apache.spark.scheduler.Task.run(Task.scala:51)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:187)
	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)


 This occurs only after migrating to the 1.0.0 API. The details of the code the data file used to test are included in this gist : https://gist.github.com/reachbach/d8977c8eb5f71f889301



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