当使用RocksDB作为后端存储并使用HDFS作为检查点的存储来运行Flink（1.6.0）数据流作业时，我在尝试通过cli进行保存点时遇到了akka.pattern.AskTimeoutException。
org.apache.flink.util.FlinkException: Triggering a savepoint for the job e569cf53baecae9cb4fa794d590d670f failed.
at org.apache.flink.client.cli.CliFrontend.triggerSavepoint(CliFrontend.java:714)
at org.apache.flink.client.cli.CliFrontend.lambda$savepoint$9(CliFrontend.java:692)
at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:979)
at org.apache.flink.client.cli.CliFrontend.savepoint(CliFrontend.java:689)
at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1059)
at org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1120)
at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30)
at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1120)
Caused by: java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/jobmanager_15#-1160136947]] after [60000 ms]. Sender[null] sent message of type "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
at java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:326)
at java.util.concurrent.CompletableFuture.completeRelay(CompletableFuture.java:338)
at java.util.concurrent.CompletableFuture.uniRelay(CompletableFuture.java:911)
at java.util.concurrent.CompletableFuture$UniRelay.tryFire(CompletableFuture.java:899)
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$$anon$4.run(LightArrayRevolverScheduler.scala:236)
at java.lang.Thread.run(Thread.java:748)
Caused by: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/jobmanager_15#-1160136947]] after [60000 ms]. Sender[null] sent message of type "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
... 9 more
我将askTimeout从10s增加到60s，但是我没有帮助。另外，在例外之后，我看到flink在HDFS上创建了2.4 G的保存点文件。
我想知道在这种情况下该怎么办？一旦状态开始进一步增长，将超时增加到高价值似乎不是可行的方法。
更新： 我感觉它实际上是CLI或JobManager的错误，正如我在日志中看到的那样，任务管理器能够在几秒钟内完成所有保存点。 截短的任务管理器日志： https://pastebin.com/fvu4uhAf