[jira] [Created] (SPARK-25027) LegacyAccumulatorWrapper test fails in Scala 2.12

["Sean Owen (JIRA)" <ji...@apache.org>]

Sean Owen created SPARK-25027:
---------------------------------

             Summary: LegacyAccumulatorWrapper test fails in Scala 2.12
                 Key: SPARK-25027
                 URL: https://issues.apache.org/jira/browse/SPARK-25027
             Project: Spark
          Issue Type: Bug
          Components: Build, Spark Core, Tests
    Affects Versions: 2.4.0
            Reporter: Sean Owen
            Assignee: Sean Owen


I've found at least one test failure in the 2.12; am running further to see if there are more.
{code:java}
- LegacyAccumulatorWrapper with AccumulatorParam that has no equals/hashCode *** FAILED ***
java.io.NotSerializableException: org.scalatest.Assertions$AssertionsHelper
Serialization stack:
- object not serializable (class: org.scalatest.Assertions$AssertionsHelper, value: org.scalatest.Assertions$AssertionsHelper@1b27bfe7)
- field (class: org.scalatest.FunSuite, name: assertionsHelper, type: class org.scalatest.Assertions$AssertionsHelper)
- object (class org.apache.spark.util.AccumulatorV2Suite, AccumulatorV2Suite)
- field (class: org.apache.spark.util.AccumulatorV2Suite$$anon$1, name: $outer, type: class org.apache.spark.util.AccumulatorV2Suite)
- object (class org.apache.spark.util.AccumulatorV2Suite$$anon$1, org.apache.spark.util.AccumulatorV2Suite$$anon$1@52d0064e)
- field (class: org.apache.spark.util.LegacyAccumulatorWrapper, name: param, type: interface org.apache.spark.AccumulableParam)
- object (class org.apache.spark.util.LegacyAccumulatorWrapper, LegacyAccumulatorWrapper(id: 358431, name: Some(test), value: org.apache.spark.util.AccumulatorV2Suite$MyData$1@7385bc7a))
at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:41)
at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
at org.apache.spark.util.AccumulatorV2Suite.$anonfun$new$5(AccumulatorV2Suite.scala:182)
at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
at org.scalatest.Transformer.apply(Transformer.scala:22)
at org.scalatest.Transformer.apply(Transformer.scala:20)
at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:186)
...
{code}



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