Hi Le, I believe the issue is the bounded source[1]. Stateful Functions only supports unbounded inputs.
Additionally, you can remove all the `synchronized` blocks from your code; statefun handles all synchronization for you. Seth [1] https://gist.github.com/flint-stone/cbc60f2d41507fdf33507ba998696134#file-example-java-L249-L251 On Fri, Feb 26, 2021 at 8:28 PM Le Xu <[email protected]> wrote: > Hello! > > I'm getting an exception running a modified version of datastream/statefun > example. (See exception details that follow.) The example was adapted from > the original datastream example provided in statefun repo. I was trying to > play with the example by chaining two functions (with the 1st function > simulating async IO function invocation). However I'm getting an exception > saying that the mailbox is closed before the operation finishes. I'm adding > the source code of the example here > <https://gist.github.com/flint-stone/cbc60f2d41507fdf33507ba998696134> > (Please ignore the printing statement and variable usage not making any > sense since I'm debugging). The example works without chaining the second > function or without using AsyncIO in any of the functions. Any ideas why > this happens? Any suggestions would be appreciated. > > > Thanks! > > Le > > org.apache.flink.client.program.ProgramInvocationException: The main > method caused an error: > org.apache.flink.client.program.ProgramInvocationException: Job failed > (JobID: 885ad02322104a6e36b011fadc704d2a) > at > org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:302) > at > org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:198) > at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:149) > at > org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:699) > at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:232) > at > org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:916) > at > org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:992) > at > org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30) > at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:992) > Caused by: java.util.concurrent.ExecutionException: > org.apache.flink.client.program.ProgramInvocationException: Job failed > (JobID: 885ad02322104a6e36b011fadc704d2a) > at > java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) > at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895) > at > org.apache.flink.client.program.StreamContextEnvironment.getJobExecutionResult(StreamContextEnvironment.java:116) > at > org.apache.flink.client.program.StreamContextEnvironment.execute(StreamContextEnvironment.java:80) > at > org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1700) > at > org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1682) > at > org.apache.flink.statefun.examples.datastream.Example.main(Example.java:142) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at > org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:288) > ... 8 more > Caused by: org.apache.flink.client.program.ProgramInvocationException: Job > failed (JobID: 885ad02322104a6e36b011fadc704d2a) > at > org.apache.flink.client.deployment.ClusterClientJobClientAdapter.lambda$null$6(ClusterClientJobClientAdapter.java:116) > at > java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) > at > java.util.concurrent.CompletableFuture$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$22(RestClusterClient.java:602) > at > java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760) > at > java.util.concurrent.CompletableFuture$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$8(FutureUtils.java:309) > at > java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760) > at > java.util.concurrent.CompletableFuture$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: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$6(ClusterClientJobClientAdapter.java:114) > ... 19 more > Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed > by NoRestartBackoffTimeStrategy > at > org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:116) > at > org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:78) > at > org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:192) > at > org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:185) > at > org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:179) > at > org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:590) > at > org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:384) > at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at > org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:286) > at > org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:201) > at > org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74) > at > org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:154) > at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) > at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) > at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123) > at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) > at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170) > at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) > at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) > at akka.actor.Actor$class.aroundReceive(Actor.scala:517) > 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$WorkQueue.runTask(ForkJoinPool.java:1339) > at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > at > akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) > Caused by: java.util.concurrent.RejectedExecutionException: > java.lang.IllegalStateException: Mailbox is in state CLOSED, but is > required to be in state OPEN for put operations. > at > org.apache.flink.streaming.runtime.tasks.mailbox.MailboxExecutorImpl.execute(MailboxExecutorImpl.java:71) > at > org.apache.flink.streaming.api.operators.MailboxExecutor.execute(MailboxExecutor.java:94) > at > org.apache.flink.statefun.flink.core.common.MailboxExecutorFacade.execute(MailboxExecutorFacade.java:35) > at > org.apache.flink.statefun.flink.core.feedback.FeedbackChannel$ConsumerTask.scheduleDrainAll(FeedbackChannel.java:114) > at > org.apache.flink.statefun.flink.core.feedback.FeedbackChannel.put(FeedbackChannel.java:64) > at > org.apache.flink.statefun.flink.core.feedback.FeedbackSinkOperator.processElement(FeedbackSinkOperator.java:58) > at > org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:161) > at > org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:178) > at > org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:153) > at > org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:67) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:351) > at > org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:185) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:569) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:534) > at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721) > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546) > at java.lang.Thread.run(Thread.java:748) > Caused by: java.lang.IllegalStateException: Mailbox is in state CLOSED, > but is required to be in state OPEN for put operations. > at > org.apache.flink.streaming.runtime.tasks.mailbox.TaskMailboxImpl.checkPutStateConditions(TaskMailboxImpl.java:265) > at > org.apache.flink.streaming.runtime.tasks.mailbox.TaskMailboxImpl.put(TaskMailboxImpl.java:193) > at > org.apache.flink.streaming.runtime.tasks.mailbox.MailboxExecutorImpl.execute(MailboxExecutorImpl.java:69) > ... 16 more >
