[jira] [Created] (FLINK-10475) Standalone HA - Leader election is not triggered on loss of leader

["Thomas Wozniakowski (JIRA)" <ji...@apache.org>]

Thomas Wozniakowski created FLINK-10475:
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             Summary: Standalone HA - Leader election is not triggered on loss of leader
                 Key: FLINK-10475
                 URL: https://issues.apache.org/jira/browse/FLINK-10475
             Project: Flink
          Issue Type: Bug
    Affects Versions: 1.5.4
            Reporter: Thomas Wozniakowski


Hey Guys,

Just testing the new bugfix release of 1.5.4. Happy to see that the issue of jobgraphs hanging around forever has been resolved in standalone/zookeeper HA mode, but now I'm seeing a different issue.

It looks like the HA failover is never triggered. I set up a 3/3/3 cluster of zookeeper/jobmanager/taskmanagers. Started my job, all fine with the new version. I then proceeded to kill the leading jobmanager to test the failover.

The remaining jobmanagers never triggered a leader election, and simply got stuck.
The logs of the remaining job managers were full of this:

```
2018-10-01 15:35:44,558 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.tcp://flink@10.1.3.118:50010/user/dispatcher#-1286445443]] after [10000 ms]. Sender[null] sent message of type "org.apache.flink.runtime.rpc.messages.RemoteFencedMessage".
	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)
```



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