背景
启动 Flink 时，我在日志中立即失败，随后尝试运行应用程序都失败了。我已经将失败的范围缩小到 Java 10 特定，可能还有其他先决条件。
再现
./bin/start-local.sh 启动 Flink。 cat ./log/flink-ming-taskmanager-0-C02TJ6XBG8WN.log 。会有大量的错误输出，如(2)。 ./bin/flink run ~/git/ming-data-frameworks-poc/flinkpoc/target/scala-2.11/flinkpoc_2.11-0.1-SNAPSHOT.jar --port 900 。我的示例应用程序在 (3) 中，但据我所知，任何应用程序都会发生这种情况。它应该失败并出现错误，如 (4) ./bin/stop-local.sh 停止 Flink。 问题
这是已知的不兼容吗？它没有这样记录。特别是，the official quick start documentation 说:
Flink runs on Linux, Mac OS X, and Windows. To be able to run Flink, the only requirement is to have a working Java 7.x (or higher) installation.
如何在 Java 10 上修复或解决此问题？
这是 Flink 中的错误吗？是否应该向项目上游报告？
预先感谢您提供的任何建议或帮助。
补充资料
(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.sbtname := "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.scalapackage 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
最佳答案
文档已过时。 Flink 1.4 放弃了对 Java 7 的支持，目前还不支持 Java 9 和 10。您将需要使用 Java 8。
更新:
Flink-8033是跟踪 Java 9 支持的 Jira 问题。
关于scala - Flink 在 Java 10 上启动时失败。TaskManager : java. lang.ClassCastException: [B 无法转换为 [C]，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50300527/