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https://issues.apache.org/jira/browse/FLINK-8750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16378991#comment-16378991
 ] 

ASF GitHub Bot commented on FLINK-8750:
---------------------------------------

Github user NicoK commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5588#discussion_r171002283
  
    --- Diff: 
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/serialization/EventSerializerTest.java
 ---
    @@ -117,49 +116,55 @@ public void testIsEventPeakOnly() throws Exception {
        }
     
        /**
    -    * Tests {@link EventSerializer#isEvent(Buffer, Class, ClassLoader)} 
returns
    +    * Tests {@link EventSerializer#isEvent(Buffer, Class)} returns
         * the correct answer for various encoded event buffers.
         */
        @Test
        public void testIsEvent() throws Exception {
                AbstractEvent[] events = {
                        EndOfPartitionEvent.INSTANCE,
    -                   EndOfSuperstepEvent.INSTANCE,
                        new CheckpointBarrier(1678L, 4623784L, 
CheckpointOptions.forCheckpointWithDefaultLocation()),
                        new TestTaskEvent(Math.random(), 12361231273L),
    -                   new CancelCheckpointMarker(287087987329842L)
    +                   new CancelCheckpointMarker(287087987329842L),
    +                   EndOfSuperstepEvent.INSTANCE
    +           };
    --- End diff --
    
    I wonder why the order of the events changed?


> InputGate may contain data after an EndOfPartitionEvent
> -------------------------------------------------------
>
>                 Key: FLINK-8750
>                 URL: https://issues.apache.org/jira/browse/FLINK-8750
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Network
>            Reporter: Nico Kruber
>            Assignee: Piotr Nowojski
>            Priority: Blocker
>             Fix For: 1.5.0
>
>
> The travis run at https://travis-ci.org/apache/flink/jobs/344425772 indicates 
> that there was still some data after an {{EndOfPartitionEvent}} or that 
> {{BufferOrEvent#moreAvailable}} contained the wrong value:
> {code}
> testOutputWithoutPk(org.apache.flink.table.runtime.stream.table.JoinITCase)  
> Time elapsed: 4.611 sec  <<< ERROR!
> org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply$mcV$sp(JobManager.scala:891)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:834)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:834)
>       at 
> scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
>       at 
> scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
>       at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39)
>       at 
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:415)
>       at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
>       at 
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.IllegalStateException: null
>       at 
> org.apache.flink.util.Preconditions.checkState(Preconditions.java:179)
>       at 
> org.apache.flink.runtime.io.network.partition.consumer.UnionInputGate.getNextBufferOrEvent(UnionInputGate.java:173)
>       at 
> org.apache.flink.streaming.runtime.io.BarrierTracker.getNextNonBlocked(BarrierTracker.java:94)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor.processInput(StreamTwoInputProcessor.java:292)
>       at 
> org.apache.flink.streaming.runtime.tasks.TwoInputStreamTask.run(TwoInputStreamTask.java:115)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:308)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)
>       at java.lang.Thread.run(Thread.java:748)
> {code}



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