[ 
https://issues.apache.org/jira/browse/FLINK-10911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17094689#comment-17094689
 ] 

Aki Tanaka commented on FLINK-10911:
------------------------------------

I tried to test running a simple flink-scala-shell code with Scala 2.12 but the 
job failed. (I checked out Flink 1.10 code and applied commit in 
https://github.com/apache/flink/pull/11895) Maybe I miss something but does 
flink-scala-shell work with Scala 2.12?


{code:java}
scala>         val count = initial.iterate(10000) { iterationInput: 
DataSet[Int] =>
     |           val result = iterationInput.map { i =>
     |             val x = Math.random()
     |             val y = Math.random()
     |             i + (if (x * x + y * y < 1) 1 else 0)
     |           }
     |           result
     |         }
..
2020-04-28 16:48:32,191 INFO yarn.YarnClusterDescriptor: Found Web Interface 
ip-172-30-6-169:46583 of application 'application_1588091530380_0002'.
org.apache.flink.client.program.ProgramInvocationException: Job failed (JobID: 
e4655e171603cca37d2f5eba24b0a48d)
  at 
org.apache.flink.client.deployment.ClusterClientJobClientAdapter.lambda$null$6(ClusterClientJobClientAdapter.java:112)
  at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616)
  at 
java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:591)
  at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
  at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975)
  at 
org.apache.flink.client.program.rest.RestClusterClient.lambda$pollResourceAsync$21(RestClusterClient.java:565)
  at 
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
  at 
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
  at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
  at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975)
  at 
org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$8(FutureUtils.java:291)
  at 
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
  at 
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
  at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
  at java.util.concurrent.CompletableFuture.postFire(CompletableFuture.java:575)
  at 
java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:943)
  at 
java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:456)
  at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution 
failed.
  at 
org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:147)
  at 
org.apache.flink.client.deployment.ClusterClientJobClientAdapter.lambda$null$6(ClusterClientJobClientAdapter.java:110)
  ... 19 more
Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by 
NoRestartBackoffTimeStrategy
  at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:110)
  at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:76)
  at 
org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:192)
  at 
org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:186)
  at 
org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:180)
  at 
org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:484)
  at 
org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:380)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:279)
  at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:194)
  at 
org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74)
  at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:152)
  at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26)
  at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21)
  at scala.PartialFunction.applyOrElse(PartialFunction.scala:123)
  at scala.PartialFunction.applyOrElse$(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.ExceptionInInitializerError: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
  ... 37 more
{code}


> Enable flink-scala-shell with Scala 2.12
> ----------------------------------------
>
>                 Key: FLINK-10911
>                 URL: https://issues.apache.org/jira/browse/FLINK-10911
>             Project: Flink
>          Issue Type: Bug
>          Components: Scala Shell
>    Affects Versions: 1.7.0
>            Reporter: Till Rohrmann
>            Assignee: Jeff Zhang
>            Priority: Major
>              Labels: pull-request-available
>
> Flink's {{flink-scala-shell}} module is not working with Scala 2.12. 
> Therefore, it is currently excluded from the Scala 2.12 builds.



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