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https://issues.apache.org/jira/browse/FLINK-4387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388066#comment-16388066
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Nico Kruber commented on FLINK-4387:
------------------------------------

because it is not fixed :( - and I'd target this for 1.6 only

> Instability in KvStateClientTest.testClientServerIntegration()
> --------------------------------------------------------------
>
>                 Key: FLINK-4387
>                 URL: https://issues.apache.org/jira/browse/FLINK-4387
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 1.1.0, 1.5.0, 1.6.0
>            Reporter: Robert Metzger
>            Assignee: Nico Kruber
>            Priority: Major
>              Labels: test-stability
>             Fix For: 1.2.0, 1.6.0
>
>
> According to this log: 
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/151491745/log.txt
> the {{KvStateClientTest}} didn't complete.
> {code}
> "main" #1 prio=5 os_prio=0 tid=0x00007fb2b400a000 nid=0x29dc in Object.wait() 
> [0x00007fb2bcb3b000]
>    java.lang.Thread.State: WAITING (on object monitor)
>       at java.lang.Object.wait(Native Method)
>       - waiting on <0x00000000f7c049a0> (a 
> io.netty.util.concurrent.DefaultPromise)
>       at java.lang.Object.wait(Object.java:502)
>       at 
> io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:254)
>       - locked <0x00000000f7c049a0> (a 
> io.netty.util.concurrent.DefaultPromise)
>       at io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:32)
>       at 
> org.apache.flink.runtime.query.netty.KvStateServer.shutDown(KvStateServer.java:185)
>       at 
> org.apache.flink.runtime.query.netty.KvStateClientTest.testClientServerIntegration(KvStateClientTest.java:680)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> {code}
> and
> {code}
> Exception in thread "globalEventExecutor-1-3" java.lang.AssertionError
>       at 
> io.netty.util.concurrent.AbstractScheduledEventExecutor.pollScheduledTask(AbstractScheduledEventExecutor.java:83)
>       at 
> io.netty.util.concurrent.GlobalEventExecutor.fetchFromScheduledTaskQueue(GlobalEventExecutor.java:110)
>       at 
> io.netty.util.concurrent.GlobalEventExecutor.takeTask(GlobalEventExecutor.java:95)
>       at 
> io.netty.util.concurrent.GlobalEventExecutor$TaskRunner.run(GlobalEventExecutor.java:226)
>       at 
> io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
>       at java.lang.Thread.run(Thread.java:745)
> {code}



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