Unable to run basic WordCount example program from flink tutorial
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Unable to run basic WordCount example program from flink tutorial
 
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Dear all,
I am trying to set up flink and after hours I still fail to make a simple program run even though I follow every recommended step in the tutorials. My operating system is OSX (therefore everything was installed via brew) and I am using Maven as a build tool. I used the quick start script for scala to set up a new project. Then, I only did two things: 1) paced the code from word count object to the BatchJob.scala file (https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/batch/) 2) alternated the MainClass in the pom.xml file from StreamJob to BatchJob Then, I build via "mvn clean package" and run the .jar. file. When compiling, I receive the following warning: ———————————————————————————————————————————————————————————————————— Expected all dependencies to require Scala version: 2.11.12 org.scala-lang:scala-reflect:2.11.12 requires scala version: 2.11.12 org.apache.flink:flink-scala_2.11:1.10.0 requires scala version: 2.11.12 org.apache.flink:flink-scala_2.11:1.10.0 requires scala version: 2.11.12 org.scala-lang:scala-compiler:2.11.12 requires scala version: 2.11.12 org.scala-lang.modules:scala-xml_2.11:1.0.5 requires scala version: 2.11.7 Multiple versions of scala libraries detected! ———————————————————————————————————————————————————————————————————— Which is weird, since the pom.xml file should keep all versions the same (at least the structures seems like it) and by playing around with the pom.xml file I could not prevent this warning. Either way, I could not find any information on the internet if the warning might be the reason for the error I am getting when running the jar file. The error I get when I run my .jar file is the following: ———————————————————————————————————————————————————————————————————— The program finished with the following exception: org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: org.apache.flink.client.program.ProgramInvocationException: Job failed (JobID: 32d249e2b67ef0ecbc72bd164fe1dfb9) at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:335) at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:205) at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:138) at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:662) at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:210) at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:893) at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:966) at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30) at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:966) Caused by: java.util.concurrent.ExecutionException: org.apache.flink.client.program.ProgramInvocationException: Job failed (JobID: 32d249e2b67ef0ecbc72bd164fe1dfb9) at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895) at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:73) at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:844) at org.apache.flink.api.java.DataSet.collect(DataSet.java:413) at org.apache.flink.api.java.DataSet.print(DataSet.java:1652) at org.apache.flink.api.scala.DataSet.print(DataSet.scala:1864) at org.myorg.quickstart.BatchJob$.main(BatchJob.scala:19) at org.myorg.quickstart.BatchJob.main(BatchJob.scala) 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:498) at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:321) ... 8 more Caused by: org.apache.flink.client.program.ProgramInvocationException: Job failed (JobID: 32d249e2b67ef0ecbc72bd164fe1dfb9) at org.apache.flink.client.deployment.ClusterClientJobClientAdapter.lambda$null$6(ClusterClientJobClientAdapter.java:112) at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) at org.apache.flink.client.program.rest.RestClusterClient.lambda$pollResourceAsync$21(RestClusterClient.java:565) at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760) at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) at org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$8(FutureUtils.java:291) at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760) at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) at java.util.concurrent.CompletableFuture.postFire(CompletableFuture.java:561) at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:929) at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed. at org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:147) at org.apache.flink.client.deployment.ClusterClientJobClientAdapter.lambda$null$6(ClusterClientJobClientAdapter.java:110) ... 19 more Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by NoRestartBackoffTimeStrategy at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:110) at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:76) at org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:192) at org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:186) at org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:180) at org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:496) at org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:380) at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:284) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:199) at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:152) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) at scala.PartialFunction.applyOrElse(PartialFunction.scala:123) at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122) at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) at akka.actor.Actor.aroundReceive(Actor.scala:517) at akka.actor.Actor.aroundReceive$(Actor.scala:515) at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592) at akka.actor.ActorCell.invoke(ActorCell.scala:561) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258) at akka.dispatch.Mailbox.run(Mailbox.scala:225) at akka.dispatch.Mailbox.exec(Mailbox.scala:235) at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) Caused by: java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps; at org.myorg.quickstart.BatchJob$$anonfun$1.apply(BatchJob.scala:14) at org.myorg.quickstart.BatchJob$$anonfun$1.apply(BatchJob.scala:14) at org.apache.flink.api.scala.DataSet$$anon$5.flatMap(DataSet.scala:609) at org.apache.flink.runtime.operators.chaining.ChainedFlatMapDriver.collect(ChainedFlatMapDriver.java:80) at org.apache.flink.runtime.operators.util.metrics.CountingCollector.collect(CountingCollector.java:35) at org.apache.flink.runtime.operators.DataSourceTask.invoke(DataSourceTask.java:196) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:708) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:533) at java.lang.Thread.run(Thread.java:745) ———————————————————————————————————————————————————————————————————— I would be very glad, if some can help me out with this issue. Best, Tom |
Re: Unable to run basic WordCount example program from flink tutorial
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Dear Tom, This is likely a scala version issue. Can you post your pom.xml? Regards,
Roman On Tue, Jun 2, 2020 at 6:34 PM Tom Burgert <[hidden email]> wrote:
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Re:Unable to run basic WordCount example program from flink tutorial
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In reply to this post by Tom Burgert
Dear Tom， This is likely a Scala version issue, you can check the following aspects: 1. Scala version of your development environment; 2. Whether there are multiple versions of Scala in your development environment; 3. Supported Scala versions for each dependency in the pom.xml file. At 2020-06-03 00:33:54, "Tom Burgert" <[hidden email]> wrote: Dear all,
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Re: Unable to run basic WordCount example program from flink tutorial
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In reply to this post by r_khachatryan
Dear Roman,
this is my pom.xml file, which is the file from the template project from the official flink website. Only the main class has been changed. <!--
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.myorg.quickstart</groupId> <artifactId>quickstart</artifactId> <version>0.1</version> <packaging>jar</packaging> <name>Flink Quickstart Job</name> <url>http://www.myorganization.org</url> <repositories> <repository> <id>apache.snapshots</id> <name>Apache Development Snapshot Repository</name> <url>https://repository.apache.org/content/repositories/snapshots/</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <flink.version>1.10.0</flink.version> <scala.binary.version>2.11</scala.binary.version> <scala.version>2.11.12</scala.version> </properties> <dependencies> <!-- Apache Flink dependencies --> <!-- These dependencies are provided, because they should not be packaged into the JAR file. --> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-scala_${scala.binary.version}</artifactId> <version>${flink.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-streaming-scala_${scala.binary.version}</artifactId> <version>${flink.version}</version> <scope>provided</scope> </dependency> <!-- Scala Library, provided by Flink as well. --> <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-library</artifactId> <version>${scala.version}</version> <scope>provided</scope> </dependency> <!-- Add connector dependencies here. They must be in the default scope (compile). --> <!-- Example: <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-connector-kafka-0.10_${scala.binary.version}</artifactId> <version>${flink.version}</version> </dependency> --> <!-- Add logging framework, to produce console output when running in the IDE. --> <!-- These dependencies are excluded from the application JAR by default. --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.7</version> <scope>runtime</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> <scope>runtime</scope> </dependency> </dependencies> <build> <plugins> <!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. --> <!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.1.1</version> <executions> <!-- Run shade goal on package phase --> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <artifactSet> <excludes> <exclude>org.apache.flink:force-shading</exclude> <exclude>com.google.code.findbugs:jsr305</exclude> <exclude>org.slf4j:*</exclude> <exclude>log4j:*</exclude> </excludes> </artifactSet> <filters> <filter> <!-- Do not copy the signatures in the META-INF folder. Otherwise, this might cause SecurityExceptions when using the JAR. --> <artifact>*:*</artifact> <excludes> <exclude>META-INF/*.SF</exclude> <exclude>META-INF/*.DSA</exclude> <exclude>META-INF/*.RSA</exclude> </excludes> </filter> </filters> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>org.myorg.quickstart.BatchJob</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin> <!-- Java Compiler --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <!-- Scala Compiler --> <plugin> <groupId>net.alchim31.maven</groupId> <artifactId>scala-maven-plugin</artifactId> <version>3.2.2</version> <executions> <execution> <goals> <goal>compile</goal> <goal>testCompile</goal> </goals> </execution> </executions> <configuration> <args> <arg>-nobootcp</arg> </args> </configuration> </plugin> <!-- Eclipse Scala Integration --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.8</version> <configuration> <downloadSources>true</downloadSources> <projectnatures> <projectnature>org.scala-ide.sdt.core.scalanature</projectnature> <projectnature>org.eclipse.jdt.core.javanature</projectnature> </projectnatures> <buildcommands> <buildcommand>org.scala-ide.sdt.core.scalabuilder</buildcommand> </buildcommands> <classpathContainers> <classpathContainer>org.scala-ide.sdt.launching.SCALA_CONTAINER</classpathContainer> <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer> </classpathContainers> <excludes> <exclude>org.scala-lang:scala-library</exclude> <exclude>org.scala-lang:scala-compiler</exclude> </excludes> <sourceIncludes> <sourceInclude>**/*.scala</sourceInclude> <sourceInclude>**/*.java</sourceInclude> </sourceIncludes> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>1.7</version> <executions> <!-- Add src/main/scala to eclipse build path --> <execution> <id>add-source</id> <phase>generate-sources</phase> <goals> <goal>add-source</goal> </goals> <configuration> <sources> <source>src/main/scala</source> </sources> </configuration> </execution> <!-- Add src/test/scala to eclipse build path --> <execution> <id>add-test-source</id> <phase>generate-test-sources</phase> <goals> <goal>add-test-source</goal> </goals> <configuration> <sources> <source>src/test/scala</source> </sources> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>
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Re:Re: Unable to run basic WordCount example program from flink tutorial
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In reply to this post by Tom Burgert
If you use IntelliJ IDEA to compile and run directly, you need to set the Scala version of your project in IntelliJ. At 2020-06-03 18:58:36, "Tom Burgert" <[hidden email]> wrote: Thanks for the reply and the ideas. Does the scala version in e.g. IntelliJ has an impact on the program running, when I just compile it with maven? I wasn’t aware of that fact.
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