[ 
https://issues.apache.org/jira/browse/FLINK-10314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Till Rohrmann reassigned FLINK-10314:
-------------------------------------

    Assignee: Till Rohrmann

> Blocking calls in Execution Graph creation bring down cluster
> -------------------------------------------------------------
>
>                 Key: FLINK-10314
>                 URL: https://issues.apache.org/jira/browse/FLINK-10314
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination, JobManager
>    Affects Versions: 1.5.2, 1.6.0
>            Reporter: Stephan Ewen
>            Assignee: Till Rohrmann
>            Priority: Blocker
>             Fix For: 1.6.1, 1.7.0, 1.5.4
>
>
> When the execution graph creation has long calls (or blocking calls), it 
> brings down the cluster. It seems to block the main actor thread of the 
> dispatcher, making the entire cluster unresponsive (web UI, etc.)
> h3. Reproducing
> One way to reproduce this is to use a FileSystem that blocks on 
> initialization or on opening a stream.
> h3. Full Exception Log
> {code}
> at 
> com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.initialize(GoogleHadoopFileSystemBase.java:1022)
>       at 
> com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.initialize(GoogleHadoopFileSystemBase.java:985)
>       at 
> org.apache.flink.runtime.fs.hdfs.HadoopFsFactory.create(HadoopFsFactory.java:159)
>       at 
> org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:399)
>       at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:318)
>       at org.apache.flink.core.fs.Path.getFileSystem(Path.java:298)
>       at 
> org.apache.flink.runtime.state.filesystem.FsCheckpointStorage.<init>(FsCheckpointStorage.java:61)
>       at 
> org.apache.flink.runtime.state.filesystem.FsStateBackend.createCheckpointStorage(FsStateBackend.java:443)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.<init>(CheckpointCoordinator.java:248)
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionGraph.enableCheckpointing(ExecutionGraph.java:495)
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionGraphBuilder.buildGraph(ExecutionGraphBuilder.java:345)
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionGraphBuilder.buildGraph(ExecutionGraphBuilder.java:100)
>       at 
> org.apache.flink.runtime.jobmaster.JobMaster.createExecutionGraph(JobMaster.java:1152)
>       at 
> org.apache.flink.runtime.jobmaster.JobMaster.createAndRestoreExecutionGraph(JobMaster.java:1132)
>       at 
> org.apache.flink.runtime.jobmaster.JobMaster.<init>(JobMaster.java:295)
>       at 
> org.apache.flink.runtime.jobmaster.JobManagerRunner.<init>(JobManagerRunner.java:157)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher$DefaultJobManagerRunnerFactory.createJobManagerRunner(Dispatcher.java:936)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher.createJobManagerRunner(Dispatcher.java:291)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher.runJob(Dispatcher.java:281)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher.persistAndRunJob(Dispatcher.java:266)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher$$Lambda$108/1800332159.acceptWithException(Unknown
>  Source)
>       at 
> org.apache.flink.util.function.ConsumerWithException.accept(ConsumerWithException.java:38)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher.lambda$waitForTerminatingJobManager$29(Dispatcher.java:820)
>       at 
> org.apache.flink.runtime.dispatcher.Dispatcher$$Lambda$110/1318857678.run(Unknown
>  Source)
>       at 
> java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705)
>       at 
> java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:687)
>       at 
> java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
> As a result, everything becomes unresponsive and breaks, and log is full of 
> these errors:
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:06:58,679 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:08,629 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:08,663 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:08,679 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:08,700 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:18,712 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:18,729 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:28,739 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:28,749 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:38,709 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:38,729 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:38,769 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:38,778 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:48,788 ERROR 
> org.apache.flink.runtime.rest.handler.job.JobsOverviewHandler  - Could not 
> retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> 2018-08-24 17:07:48,799 ERROR 
> org.apache.flink.runtime.rest.handler.cluster.ClusterOverviewHandler  - Could 
> not retrieve the redirect address.
> java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: 
> Ask timed out on [Actor[akka://flink/user/dispatcher#146546706]] after [10000 
> ms]. Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>       at 
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>       at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
>       at 
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>       at 
> org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:770)
>       at akka.dispatch.OnComplete.internal(Future.scala:258)
>       at akka.dispatch.OnComplete.internal(Future.scala:256)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
>       at 
> org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:83)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252)
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:603)
>       at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)
>       at 
> scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)
>       at 
> scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)
>       at 
> akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)
>       at 
> akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: akka.pattern.AskTimeoutException: Ask timed out on 
> [Actor[akka://flink/user/dispatcher#146546706]] after [10000 ms]. 
> Sender[null] sent message of type 
> "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
>       at 
> akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
>       ... 9 more
> {code}



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