[FLINK-10671] rest monitoring api Savepoint status call fails if akka.ask.timeout < checkpoint duration

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 1.6.1
• Component/s: Runtime / REST
• Assignee: Gary Yao
• Reporter: Cliff Resnick
• Created: 24/Oct/18 19:59
• Updated: 06/Nov/18 18:29
• Resolved: 06/Nov/18 18:29

Description

Hi,
 
There seems to be a problem with REST monitoring API:

/jobs/:jobid/savepoints/:triggerid

 
The problem is that when the Savepoint represented by :triggerid is called with cancel=true the above status call seems to fail if the savepoint duration exceeds akka.ask.timeout value.
 
Below is a log in which I invoke "cancel with savepoint" then poll the above endpoint for status at 2 second intervals. akka.ask.timout is set for twenty seconds. The error is repeatable at various values of akka.ask.timeout.
 

2018/10/24 19:42:25 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:27 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:29 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:31 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:33 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:35 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:37 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:39 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:41 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:43 savepoint id 925964b35b2d501f4a45b714eca0a2ca is IN_PROGRESS
2018/10/24 19:42:45 Cancel with Savepoint may have failed: java.util.concurrent.CompletionException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/jobmanager_0#-234856817]] after [20000 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$$anon$4.run(LightArrayRevolverScheduler.scala:236)
at java.lang.Thread.run(Thread.java:748)
Caused by: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/jobmanager_0#-234856817]] after [20000 ms]. Sender[null] sent message of type "org.apache.flink.runtime.rpc.messages.LocalFencedMessage".
at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)
... 9 more

Issue Links

• is related to: FLINK-10193 Default RPC timeout is used when triggering savepoint via JobMasterGateway