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https://issues.apache.org/jira/browse/FLINK-16872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17071576#comment-17071576
]
Yingjie Cao commented on FLINK-16872:
-------------------------------------
Is the job finished? Currently, we can only request back pressure stats of a
running job. Maybe we should return an empty result instead of throwing an
exception for better user experience.
> Flink UI shows server error on selecting back pressure on a batch job
> ----------------------------------------------------------------------
>
> Key: FLINK-16872
> URL: https://issues.apache.org/jira/browse/FLINK-16872
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.10.0
> Environment: flink 1.10
> Reporter: Nikola
> Priority: Minor
> Attachments: Screenshot 2020-03-30 at 19.58.04.png
>
>
> I have a batch job which when I click on "Back pressure" it shows a bubble
> saying "Server error". The reason is because the backend returns 500 error.
> !Screenshot 2020-03-30 at 19.58.04.png!
>
> This is the body returned:
>
> {code:java}
> { "errors": [ "Internal server error.", "<Exception on server side:
> org.apache.flink.runtime.messages.FlinkJobNotFoundException: Could not find
> Flink job (b32f584d7f5970f4d8b9047e86d46170) at
> org.apache.flink.runtime.dispatcher.Dispatcher.getJobMasterGatewayFuture(Dispatcher.java:776)
> at
> org.apache.flink.runtime.dispatcher.Dispatcher.requestOperatorBackPressureStats(Dispatcher.java:527)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498) at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:279)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:194)
> at
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:152)
> at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) at
> akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) at
> scala.PartialFunction.applyOrElse(PartialFunction.scala:123) at
> scala.PartialFunction.applyOrElse$(PartialFunction.scala:122) at
> akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) at
> akka.actor.Actor.aroundReceive(Actor.scala:517) at
> akka.actor.Actor.aroundReceive$(Actor.scala:515) at
> akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225) at
> akka.actor.ActorCell.receiveMessage(ActorCell.scala:592) at
> akka.actor.ActorCell.invoke(ActorCell.scala:561) at
> akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258) at
> akka.dispatch.Mailbox.run(Mailbox.scala:225) at
> akka.dispatch.Mailbox.exec(Mailbox.scala:235) at
> akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at
> akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at
> akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> End of exception on server side>" ] }{code}
>
>
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