[jira] [Created] (SPARK-4489) JavaPairRDD.collectAsMap from checkpoint RDD may fail with ClassCastException

["Christopher Ng (JIRA)" <ji...@apache.org>]

Christopher Ng created SPARK-4489:
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             Summary: JavaPairRDD.collectAsMap from checkpoint RDD may fail with ClassCastException
                 Key: SPARK-4489
                 URL: https://issues.apache.org/jira/browse/SPARK-4489
             Project: Spark
          Issue Type: Bug
          Components: Java API
    Affects Versions: 1.1.0
            Reporter: Christopher Ng


Calling collectAsMap() on a JavaPairRDD reconstructed from a checkpoint fails with a ClassCastException:

Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lscala.Tuple2;
	at org.apache.spark.rdd.PairRDDFunctions.collectAsMap(PairRDDFunctions.scala:595)
	at org.apache.spark.api.java.JavaPairRDD.collectAsMap(JavaPairRDD.scala:569)
	at org.facboy.spark.CheckpointBug.main(CheckpointBug.java:46)

Code sample reproducing the issue: https://gist.github.com/facboy/8387e950ffb0746a8272



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