[
https://issues.apache.org/jira/browse/FLINK-2001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stephan Ewen closed FLINK-2001.
-------------------------------
> DistanceMetric cannot be serialized
> -----------------------------------
>
> Key: FLINK-2001
> URL: https://issues.apache.org/jira/browse/FLINK-2001
> Project: Flink
> Issue Type: Bug
> Components: Machine Learning Library
> Reporter: Chiwan Park
> Assignee: Chiwan Park
> Priority: Critical
> Labels: ML
> Fix For: 0.9
>
>
> Because DistanceMeasure trait doesn't extend Serializable, The task using
> DistanceMeasure raises a following exception.
> {code}
> Task not serializable
> org.apache.flink.api.common.InvalidProgramException: Task not serializable
> at
> org.apache.flink.api.scala.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:179)
> at
> org.apache.flink.api.scala.ClosureCleaner$.clean(ClosureCleaner.scala:171)
> at org.apache.flink.api.scala.DataSet.clean(DataSet.scala:123)
> at org.apache.flink.api.scala.DataSet$$anon$10.<init>(DataSet.scala:691)
> at org.apache.flink.api.scala.DataSet.combineGroup(DataSet.scala:690)
> at org.apache.flink.ml.classification.KNNModel.transform(KNN.scala:78)
> at
> org.apache.flink.ml.classification.KNNITSuite$$anonfun$1.apply$mcV$sp(KNNSuite.scala:25)
> at
> org.apache.flink.ml.classification.KNNITSuite$$anonfun$1.apply(KNNSuite.scala:12)
> at
> org.apache.flink.ml.classification.KNNITSuite$$anonfun$1.apply(KNNSuite.scala:12)
> at
> org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
> at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
> at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
> at org.scalatest.Transformer.apply(Transformer.scala:22)
> at org.scalatest.Transformer.apply(Transformer.scala:20)
> at org.scalatest.FlatSpecLike$$anon$1.apply(FlatSpecLike.scala:1647)
> at org.scalatest.Suite$class.withFixture(Suite.scala:1122)
> at org.scalatest.FlatSpec.withFixture(FlatSpec.scala:1683)
> at
> org.scalatest.FlatSpecLike$class.invokeWithFixture$1(FlatSpecLike.scala:1644)
> at
> org.scalatest.FlatSpecLike$$anonfun$runTest$1.apply(FlatSpecLike.scala:1656)
> at
> org.scalatest.FlatSpecLike$$anonfun$runTest$1.apply(FlatSpecLike.scala:1656)
> at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
> at org.scalatest.FlatSpecLike$class.runTest(FlatSpecLike.scala:1656)
> at
> org.apache.flink.ml.classification.KNNITSuite.org$scalatest$BeforeAndAfter$$super$runTest(KNNSuite.scala:9)
> at org.scalatest.BeforeAndAfter$class.runTest(BeforeAndAfter.scala:200)
> at
> org.apache.flink.ml.classification.KNNITSuite.runTest(KNNSuite.scala:9)
> at
> org.scalatest.FlatSpecLike$$anonfun$runTests$1.apply(FlatSpecLike.scala:1714)
> at
> org.scalatest.FlatSpecLike$$anonfun$runTests$1.apply(FlatSpecLike.scala:1714)
> at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
> at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
> at scala.collection.immutable.List.foreach(List.scala:318)
> at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
> at
> org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:390)
> at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:427)
> at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
> at scala.collection.immutable.List.foreach(List.scala:318)
> at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
> at
> org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
> at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
> at org.scalatest.FlatSpecLike$class.runTests(FlatSpecLike.scala:1714)
> at org.scalatest.FlatSpec.runTests(FlatSpec.scala:1683)
> at org.scalatest.Suite$class.run(Suite.scala:1424)
> at
> org.scalatest.FlatSpec.org$scalatest$FlatSpecLike$$super$run(FlatSpec.scala:1683)
> at
> org.scalatest.FlatSpecLike$$anonfun$run$1.apply(FlatSpecLike.scala:1760)
> at
> org.scalatest.FlatSpecLike$$anonfun$run$1.apply(FlatSpecLike.scala:1760)
> at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
> at org.scalatest.FlatSpecLike$class.run(FlatSpecLike.scala:1760)
> at
> org.apache.flink.ml.classification.KNNITSuite.org$scalatest$BeforeAndAfter$$super$run(KNNSuite.scala:9)
> at org.scalatest.BeforeAndAfter$class.run(BeforeAndAfter.scala:241)
> at org.apache.flink.ml.classification.KNNITSuite.run(KNNSuite.scala:9)
> at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:55)
> at
> org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2563)
> at
> org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2557)
> at scala.collection.immutable.List.foreach(List.scala:318)
> at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:2557)
> at
> org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1044)
> at
> org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1043)
> at
> org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:2722)
> at
> org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1043)
> at org.scalatest.tools.Runner$.run(Runner.scala:883)
> at org.scalatest.tools.Runner.run(Runner.scala)
> at
> org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.runScalaTest2(ScalaTestRunner.java:138)
> at
> org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.main(ScalaTestRunner.java:28)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
> Caused by: java.io.NotSerializableException:
> org.apache.flink.ml.metrics.distances.EuclideanDistanceMetric
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> at
> org.apache.flink.util.InstantiationUtil.serializeObject(InstantiationUtil.java:314)
> at
> org.apache.flink.api.scala.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:177)
> ... 66 more
> {code}
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