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Flink在Java 10啟動時失敗.TaskManager：java.lang.ClassCastException：[B無法強制轉換為[C

[英]Flink fails on startup on Java 10. TaskManager: java.lang.ClassCastException: [B cannot be cast to [C

 原文  2018-05-11 21:30:50  6   1    scala/ apache-flink

問題描述

背景

啟動Flink時，我立即在日志中失敗，並且后續運行應用程序的嘗試都失敗了。 我已經縮小了特定於Java 10的失敗，可能還有其他先決條件。

攝制

  1. 從官方下載頁面下載並解壓縮Flink 1.4.2。
  2. 切換到Java 10.我的特定版本信息在（1）中。
  3. 使用./bin/start-local.sh啟動Flink。
  4. 觀察TaskManager日志。 例如， cat ./log/flink-ming-taskmanager-0-C02TJ6XBG8WN.log 。 將會有大量的錯誤輸出，如（2）所示。
  5. 運行任何應用程序 例如，。 ./bin/flink run ~/git/ming-data-frameworks-poc/flinkpoc/target/scala-2.11/flinkpoc_2.11-0.1-SNAPSHOT.jar --port 900 。 我的示例應用程序在（3）中，但據我所知，任何應用程序都會發生這種情況。 它應該失敗並出現錯誤，如（4）中所示
  6. 使用./bin/stop-local.sh停止Flink。
  7. 清空Flink日志目錄。
  8. 切換到Java 8.我的特定版本信息在（5）中。
  9. 重復步驟3 - 7。
  10. 它應該顯示成功消息，如（6）所示。 它不應該因錯誤而失敗。 TaskManager日志不應包含步驟4中的錯誤輸出。

問題

這是一個已知的不兼容性嗎？ 它沒有記錄在案。 特別是， 官方快速入門文檔說：

Flink可在Linux，Mac OS X和Windows上運行。 為了能夠運行Flink，唯一的要求是安裝一個有效的Java 7.x（或更高版本）。

如何在Java 10上修復或解決此問題？

這是Flink的錯誤嗎？ 是否應該在項目的上游報告？

提前感謝您提供任何建議或幫助。

補充信息

（1） 

$ uname -a
Darwin C02TJ6XBG8WN 16.7.0 Darwin Kernel Version 16.7.0: Tue Jan 30 11:27:06 PST 2018; root:xnu-3789.73.11~1/RELEASE_X86_64 x86_64

$ java -version
java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)

（2） 

2018-05-11 17:19:05,353 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@localhost:6123] has failed, address is now gated for [5000] ms. Reason: [[B cannot be cast to [C] 
2018-05-11 17:19:10,428 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@localhost:6123] has failed, address is now gated for [5000] ms. Reason: [Disassociated] 
2018-05-11 17:19:23,111 ERROR akka.remote.Remoting                                          - [B cannot be cast to [C
java.lang.ClassCastException: [B cannot be cast to [C
    at akka.remote.artery.FastHash$.ofString(LruBoundedCache.scala:18)
    at akka.remote.serialization.ActorRefResolveCache.hash(ActorRefResolveCache.scala:61)
    at akka.remote.serialization.ActorRefResolveCache.hash(ActorRefResolveCache.scala:55)
    at akka.remote.artery.LruBoundedCache.getOrCompute(LruBoundedCache.scala:110)
    at akka.remote.RemoteActorRefProvider.resolveActorRef(RemoteActorRefProvider.scala:403)
    at akka.actor.SerializedActorRef.readResolve(ActorRef.scala:433)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at java.base/java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1250)
    at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2087)
    at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1585)
    at java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2346)
    at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2240)
    at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2078)
    at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1585)
    at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
    at akka.serialization.JavaSerializer$$anonfun$1.apply(Serializer.scala:328)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
    at akka.serialization.JavaSerializer.fromBinary(Serializer.scala:328)
    at akka.serialization.Serialization.akka$serialization$Serialization$$deserializeByteArray(Serialization.scala:156)
    at akka.serialization.Serialization$$anonfun$deserialize$2.apply(Serialization.scala:142)
    at scala.util.Try$.apply(Try.scala:192)
    at akka.serialization.Serialization.deserialize(Serialization.scala:136)
    at akka.remote.MessageSerializer$.deserialize(MessageSerializer.scala:30)
    at akka.remote.DefaultMessageDispatcher.payload$lzycompute$1(Endpoint.scala:64)
    at akka.remote.DefaultMessageDispatcher.payload$1(Endpoint.scala:64)
    at akka.remote.DefaultMessageDispatcher.dispatch(Endpoint.scala:82)
    at akka.remote.EndpointReader$$anonfun$akka$remote$EndpointReader$$deliverAndAck$1.apply(Endpoint.scala:1047)
    at akka.remote.EndpointReader$$anonfun$akka$remote$EndpointReader$$deliverAndAck$1.apply(Endpoint.scala:1046)
    at scala.collection.Iterator$class.foreach(Iterator.scala:891)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
    at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at akka.remote.EndpointReader.akka$remote$EndpointReader$$deliverAndAck(Endpoint.scala:1046)
    at akka.remote.EndpointReader$$anonfun$receive$2.applyOrElse(Endpoint.scala:980)
    at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
    at akka.remote.EndpointActor.aroundReceive(Endpoint.scala:446)
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
    at akka.actor.ActorCell.invoke(ActorCell.scala:495)
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
    at akka.dispatch.Mailbox.run(Mailbox.scala:224)
    at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

（3）

build.sbt 

name := "flinkpoc"

version := "0.1-SNAPSHOT"

scalaVersion := "2.11.8"

val flinkVersion = "1.4.2"

libraryDependencies := Seq(
  "org.apache.flink" %% "flink-scala" % flinkVersion % "provided",
  "org.apache.flink" %% "flink-streaming-scala" % flinkVersion % "provided"
)

SimpleJob.scala 

package flinkpoc

import org.apache.flink.streaming.api.scala._

object SimpleJob {

  def main(args: Array[String]): Unit = {
    val env = StreamExecutionEnvironment.getExecutionEnvironment

    val inStream = env.fromCollection(Range(0, 100).toList)
    val outStream = inStream.map(_ * 100)
    outStream.print

    env.execute("flinkpoc.SimpleJob")
  }

}

（4） 

org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Couldn't retrieve the JobExecutionResult from the JobManager.
    at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:492)
    at org.apache.flink.client.program.StandaloneClusterClient.submitJob(StandaloneClusterClient.java:105)
    at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:456)
    at org.apache.flink.streaming.api.environment.StreamContextEnvironment.execute(StreamContextEnvironment.java:66)
    at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:638)
    at flinkpoc.SimpleJob$.main(SimpleJob.scala:14)
    at flinkpoc.SimpleJob.main(SimpleJob.scala)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:525)
    at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:417)
    at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:396)
    at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:802)
    at org.apache.flink.client.CliFrontend.run(CliFrontend.java:282)
    at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1054)
    at org.apache.flink.client.CliFrontend$1.call(CliFrontend.java:1101)
    at org.apache.flink.client.CliFrontend$1.call(CliFrontend.java:1098)
    at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30)
    at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1098)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Couldn't retrieve the JobExecutionResult from the JobManager.
    at org.apache.flink.runtime.client.JobClient.awaitJobResult(JobClient.java:300)
    at org.apache.flink.runtime.client.JobClient.submitJobAndWait(JobClient.java:387)
    at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:481)
    ... 20 more
Caused by: org.apache.flink.runtime.client.JobClientActorConnectionTimeoutException: Lost connection to the JobManager.
    at org.apache.flink.runtime.client.JobClientActor.handleMessage(JobClientActor.java:219)
    at org.apache.flink.runtime.akka.FlinkUntypedActor.handleLeaderSessionID(FlinkUntypedActor.java:104)
    at org.apache.flink.runtime.akka.FlinkUntypedActor.onReceive(FlinkUntypedActor.java:71)
    at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:165)
    at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
    at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
    at akka.actor.ActorCell.invoke(ActorCell.scala:495)
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
    at akka.dispatch.Mailbox.run(Mailbox.scala:224)
    at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

（5） 

$ java -version
java version "1.8.0_172"
Java(TM) SE Runtime Environment (build 1.8.0_172-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.172-b11, mixed mode)

（6） 

Program execution finished
Job with JobID b41e26f012480d2842cbb8bde0098180 has finished.
Job Runtime: 379 ms

1 個解決方案

解決方案1
 7 已采納  2018-05-12 12:46:10

文檔已過期。 Flink 1.4放棄了對Java 7的支持，並且還不支持Java版本9和10。 您需要使用Java 8。

更新：

Flink-8033是跟蹤Java 9支持的Jira問題。

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