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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/10/16 19:58:00 UTC
[jira] [Commented] (FLINK-8887) ClusterClient.getJobStatus can
throw FencingTokenException
[ https://issues.apache.org/jira/browse/FLINK-8887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16652363#comment-16652363 ]
ASF GitHub Bot commented on FLINK-8887:
---------------------------------------
zentol closed pull request #5648: [FLINK-8887][flip-6] ClusterClient.getJobStatus can throw FencingTokenException
URL: https://github.com/apache/flink/pull/5648
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java b/flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java
index 9b2411c66b7..1789758a6f1 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java
@@ -57,6 +57,7 @@
import org.apache.flink.runtime.rpc.FencedRpcEndpoint;
import org.apache.flink.runtime.rpc.RpcService;
import org.apache.flink.runtime.rpc.RpcUtils;
+import org.apache.flink.runtime.rpc.exceptions.FencingTokenException;
import org.apache.flink.util.ExceptionUtils;
import org.apache.flink.util.FlinkException;
import org.apache.flink.util.Preconditions;
@@ -74,6 +75,7 @@
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
import java.util.stream.Collectors;
/**
@@ -404,7 +406,29 @@ public void start() throws Exception {
final JobManagerRunner jobManagerRunner = jobManagerRunners.get(jobId);
if (jobManagerRunner != null) {
- return jobManagerRunner.getJobManagerGateway().requestJobStatus(timeout);
+ CompletableFuture<JobStatus> statusFuture = jobManagerRunner.getJobManagerGateway().requestJobStatus(timeout);
+ statusFuture.handle((JobStatus status, Throwable throwable) -> {
+ if (throwable != null) {
+ Throwable error = ExceptionUtils.stripCompletionException(throwable);
+
+ if (error instanceof FencingTokenException) {
+ log.warn("It occurs FencingTokenException may be the job manager runner has no leadership or" +
+ " the job has finished, so we would try to get it from archived execution graph store.");
+ final JobDetails jobDetails = archivedExecutionGraphStore.getAvailableJobDetails(jobId);
+
+ if (jobDetails != null) {
+ return jobDetails.getStatus();
+ } else {
+ throw new CompletionException(new FlinkJobNotFoundException(jobId));
+ }
+ }
+
+ }
+
+ return status;
+ });
+
+ return statusFuture;
} else {
final JobDetails jobDetails = archivedExecutionGraphStore.getAvailableJobDetails(jobId);
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> ClusterClient.getJobStatus can throw FencingTokenException
> ----------------------------------------------------------
>
> Key: FLINK-8887
> URL: https://issues.apache.org/jira/browse/FLINK-8887
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination
> Affects Versions: 1.5.0
> Reporter: Gary Yao
> Assignee: Till Rohrmann
> Priority: Blocker
> Labels: flip-6, pull-request-available
> Fix For: 1.5.0
>
>
> *Description*
> Calling {{RestClusterClient.getJobStatus}} or {{MiniClusterClient.getJobStatus}} can result in a {{FencingTokenException}}.
> *Analysis*
> {{Dispatcher.requestJobStatus}} first looks the {{JobManagerRunner}} up by job id. If a reference is found, {{requestJobStatus}} is called on the respective instance. If not, the {{ArchivedExecutionGraphStore}} is queried. However, between the lookup and the method call, the {{JobMaster}} of the respective job may have lost leadership already (job finished), and has set the fencing token to {{null}}.
> *Stacktrace*
> {noformat}
> Caused by: org.apache.flink.runtime.rpc.exceptions.FencingTokenException: Fencing token mismatch: Ignoring message LocalFencedMessage(null, LocalRpcInvocation(requestJobStatus(Time))) because the fencing token null did not match the expected fencing token b8423c75bc6838244b8c93c8bd4a4f51.
> at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleMessage(FencedAkkaRpcActor.java:73)
> at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$onReceive$1(AkkaRpcActor.java:132)
> at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:544)
> at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
> at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
> at akka.actor.ActorCell.invoke(ActorCell.scala:495)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
> at akka.dispatch.Mailbox.run(Mailbox.scala:224)
> at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> {noformat}
> {noformat}
> Caused by: org.apache.flink.runtime.rpc.exceptions.FencingTokenException: Fencing token not set: Ignoring message LocalFencedMessage(null, LocalRpcInvocation(requestJobStatus(Time))) because the fencing token is null.
> at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleMessage(FencedAkkaRpcActor.java:56)
> at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$onReceive$1(AkkaRpcActor.java:132)
> at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:544)
> at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
> at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
> at akka.actor.ActorCell.invoke(ActorCell.scala:495)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
> at akka.dispatch.Mailbox.run(Mailbox.scala:224)
> at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> {noformat}
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