Flink job不定期就会重启，版本是1.9

Flink job经常不定期重启，看了异常日志基本都是下面这种，可以帮忙解释下什么原因吗？

2020-07-01 20:20:43.875 [flink-akka.actor.default-dispatcher-27] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator flink-akka.remote.default-remote-dispatcher-22 - Remoting shut down. 2020-07-01 20:20:43.875 [flink-akka.actor.default-dispatcher-27] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator flink-akka.remote.default-remote-dispatcher-22 - Remoting shut down. 2020-07-01 20:20:43.875 [flink-metrics-16] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator flink-metrics-akka.remote.default-remote-dispatcher-14 - Remoting shut down. 2020-07-01 20:20:43.875 [flink-metrics-16] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator flink-metrics-akka.remote.default-remote-dispatcher-14 - Remoting shut down. 2020-07-01 20:20:43.891 [flink-metrics-16] INFO org.apache.flink.runtime.rpc.akka.AkkaRpcService - Stopped Akka RPC service. 2020-07-01 20:20:43.895 [flink-akka.actor.default-dispatcher-15] INFO org.apache.flink.runtime.entrypoint.ClusterEntrypoint - Terminating cluster entrypoint process YarnJobClusterEntrypoint with exit code 2. java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/resourcemanager#-781959047]] after [10000 ms]. Message of type [org.apache.flink.runtime.rpc.messages.LocalFencedMessage]. A typical reason for AskTimeoutException is that the recipient actor didn't send a reply. 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$1.onComplete(FutureUtils.java:871) at akka.dispatch.OnComplete.internal(Future.scala:263) at akka.dispatch.OnComplete.internal(Future.scala:261) at akka.dispatch.japi$CallbackBridge.apply(Future.scala:191) at akka.dispatch.japi$CallbackBridge.apply(Future.scala:188) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:74) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:644) at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:205) at scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:599) at scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109) at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:597) at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:328) at akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:279) at akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:283) at akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:235) at java.lang.Thread.run(Thread.java:745) Caused by: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/resourcemanager#-781959047]] after [10000 ms]. Message of type [org.apache.flink.runtime.rpc.messages.LocalFencedMessage]. A typical reason for AskTimeoutException is that the recipient actor didn't send a reply. at akka.pattern.PromiseActorRef$$anonfun$2.apply(AskSupport.scala:635) at akka.pattern.PromiseActorRef$$anonfun$2.apply(AskSupport.scala:635) at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:648) ... 9 common frames omitted

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