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From "Chiwan Park (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-2001) DistanceMetric cannot be serialized
Date Tue, 12 May 2015 03:43:00 GMT
Chiwan Park created FLINK-2001:
----------------------------------

             Summary: 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


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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