org.apache.spark.SparkException: Task not serializable

Stack Overflow | wojtek_z | 2 months ago
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    org.apache.spark.SparkException: Task not serializable
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    org.apache.spark.SparkException: Task not serializable
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    Stack Overflow | 1 year ago | Newben
    java.io.NotSerializableException: myPackage.MyClass Serialization stack: - object not serializable (class: myPackage.MyClass, value: myPackage.MyClass@281c8380) - field (class: myPackage.MyClass$1, name: this$0, type: class myPackage.MyClass) - object (class myPackage.MyClass$1, myPackage.MyClass$1@28ef1bc8) - field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function) - object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, <function1>)

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    Root Cause Analysis

    1. java.io.NotSerializableException

      org.apache.spark.streaming.api.java.JavaStreamingContext Serialization stack: - object not serializable (class: org.apache.spark.streaming.api.java.JavaStreamingContext, value: org.apache.spark.streaming.api.java.JavaStreamingContext@4538856f) - field (class: test.spark.service.SparkServiceImpl, name: javaStreamingContext, type: class org.apache.spark.streaming.api.java.JavaStreamingContext) - object (class test.spark.service.SparkServiceImpl, test.spark.service.SparkServiceImpl@7e34b127) - field (class: test.spark.service.SparkServiceImpl$1, name: this$0, type: class test.spark.service.SparkServiceImpl) - object (class test.spark.service.SparkServiceImpl$1, test.spark.service.SparkServiceImpl$1@536b71b4) - field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function) - object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, <function1>)

      at org.apache.spark.serializer.SerializationDebugger$.improveException()
    2. Spark
      AbstractJavaRDDLike.groupBy
      1. org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
      2. org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
      3. org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
      4. org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:295)
      5. org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:288)
      6. org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:108)
      7. org.apache.spark.SparkContext.clean(SparkContext.scala:2037)
      8. org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:694)
      9. org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:693)
      10. org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      11. org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
      12. org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
      13. org.apache.spark.rdd.RDD.groupBy(RDD.scala:693)
      14. org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
      15. org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
      16. org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      17. org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
      18. org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
      19. org.apache.spark.rdd.RDD.groupBy(RDD.scala:664)
      20. org.apache.spark.api.java.JavaRDDLike$class.groupBy(JavaRDDLike.scala:242)
      21. org.apache.spark.api.java.AbstractJavaRDDLike.groupBy(JavaRDDLike.scala:45)
      21 frames
    3. test.spark.service
      SparkServiceTest.testProcess
      1. test.spark.service.SparkServiceImpl.process(SparkServiceServiceImpl.java:56)
      2. test.spark.service.SparkServiceTest.testProcess(SparkServiceTest.java:27)
      2 frames
    4. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:498)
      4 frames
    5. JUnit
      InvokeMethod.evaluate
      1. org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      2. org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      3. org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      4. org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      4 frames
    6. Spring TestContext
      SpringRepeat.evaluate
      1. org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
      2. org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
      3. org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
      3 frames
    7. JUnit
      ParentRunner.runLeaf
      1. org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      1 frame
    8. Spring TestContext
      SpringJUnit4ClassRunner.runChild
      1. org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
      2. org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
      2 frames
    9. JUnit
      ParentRunner$2.evaluate
      1. org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      2. org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      3. org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      4. org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      5. org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      5 frames
    10. Spring TestContext
      RunAfterTestClassCallbacks.evaluate
      1. org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      2. org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
      2 frames
    11. JUnit
      ParentRunner.run
      1. org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      1 frame
    12. Spring TestContext
      SpringJUnit4ClassRunner.run
      1. org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
      1 frame
    13. JUnit
      JUnitCore.run
      1. org.junit.runner.JUnitCore.run(JUnitCore.java:137)
      1 frame
    14. IntelliJ junit4 module
      JUnit4IdeaTestRunner.startRunnerWithArgs
      1. com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
      2. com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
      2 frames
    15. IDEA
      JUnitStarter.main
      1. com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
      2. com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
      2 frames
    16. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:498)
      4 frames
    17. IDEA
      AppMain.main
      1. com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
      1 frame