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From "Chesnay Schepler (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-9847) OneInputStreamTaskTest.testWatermarksNotForwardedWithinChainWhenIdle unstable
Date Mon, 16 Jul 2018 12:48:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-9847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chesnay Schepler closed FLINK-9847.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.5.2

Probably fixed in FLINK-8731 which encountered the same exception.

> OneInputStreamTaskTest.testWatermarksNotForwardedWithinChainWhenIdle unstable
> -----------------------------------------------------------------------------
>
>                 Key: FLINK-9847
>                 URL: https://issues.apache.org/jira/browse/FLINK-9847
>             Project: Flink
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 1.6.0
>            Reporter: Till Rohrmann
>            Priority: Critical
>              Labels: test-stability
>             Fix For: 1.5.2, 1.6.0
>
>
> The test {{OneInputStreamTaskTest.testWatermarksNotForwardedWithinChainWhenIdle}} is
unstable. When executing repeatedly the test fails from time to time with 
> {code}
> java.lang.Exception: error in task
> 	at org.apache.flink.streaming.runtime.tasks.StreamTaskTestHarness.waitForTaskCompletion(StreamTaskTestHarness.java:250)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTaskTestHarness.waitForTaskCompletion(StreamTaskTestHarness.java:233)
> 	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTaskTest.testWatermarksNotForwardedWithinChainWhenIdle(OneInputStreamTaskTest.java:348)
> 	at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
> 	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> 	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> 	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:67)
> 	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> 	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> Caused by: org.mockito.exceptions.misusing.WrongTypeOfReturnValue: 
> Boolean cannot be returned by getChannelIndex()
> getChannelIndex() should return int
> ***
> If you're unsure why you're getting above error read on.
> Due to the nature of the syntax above problem might occur because:
> 1. This exception *might* occur in wrongly written multi-threaded tests.
>    Please refer to Mockito FAQ on limitations of concurrency testing.
> 2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies -

>    - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.
> 	at org.apache.flink.streaming.runtime.io.BarrierBuffer.getNextNonBlocked(BarrierBuffer.java:165)
> 	at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:209)
> 	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:105)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTaskTestHarness$TaskThread.run(StreamTaskTestHarness.java:437)
> {code}
> Given the exception I suspect that there is a problem with mocking in the {{OneInputStreamTaskTestHarness}}.



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