[SPARK-4489] JavaPairRDD.collectAsMap from checkpoint RDD may fail with ClassCastException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Affects Version/s: 1.1.0
• Component/s: Java API
• Labels: bulk-closed
• Assignee: Unassigned
• Reporter: Christopher Ng
• Created: 19/Nov/14 12:13
• Updated: 21/May/19 05:37
• Resolved: 21/May/19 05:37

Description

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

Issue Links

• relates to: SPARK-2737 ClassCastExceptions when collect()ing JavaRDDs' underlying Scala RDDs
• relates to: SPARK-1040 Collect as Map throws a casting exception when run on a JavaPairRDD object
• relates to: SPARK-10762 GenericRowWithSchema exception in casting ArrayBuffer to HashSet in DataFrame to RDD from Hive table