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https://issues.apache.org/jira/browse/FLINK-20011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17227965#comment-17227965
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Dian Fu commented on FLINK-20011:
---------------------------------

https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9288&view=logs&j=c5f0071e-1851-543e-9a45-9ac140befc32&t=1fb1a56f-e8b5-5a82-00a0-a2db7757b4f5

> PageRankITCase.testPrintWithRMatGraph hangs
> -------------------------------------------
>
>                 Key: FLINK-20011
>                 URL: https://issues.apache.org/jira/browse/FLINK-20011
>             Project: Flink
>          Issue Type: Bug
>          Components: Library / Graph Processing (Gelly), Runtime / 
> Coordination, Runtime / Network
>    Affects Versions: 1.12.0
>            Reporter: Dian Fu
>            Priority: Major
>              Labels: test-stability
>
> [https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9121&view=logs&j=1fc6e7bf-633c-5081-c32a-9dea24b05730&t=80a658d1-f7f6-5d93-2758-53ac19fd5b19]
> {code}
> 2020-11-05T22:42:34.4186647Z "main" #1 prio=5 os_prio=0 
> tid=0x00007fa98c00b800 nid=0x32f8 waiting on condition [0x00007fa995c12000] 
> 2020-11-05T22:42:34.4187168Z java.lang.Thread.State: WAITING (parking) 
> 2020-11-05T22:42:34.4187563Z at sun.misc.Unsafe.park(Native Method) 
> 2020-11-05T22:42:34.4188246Z - parking to wait for <0x000000008736d120> (a 
> java.util.concurrent.CompletableFuture$Signaller) 
> 2020-11-05T22:42:34.4188881Z at 
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) 
> 2020-11-05T22:42:34.4189351Z at 
> java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1707)
>  2020-11-05T22:42:34.4189930Z at 
> java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323) 
> 2020-11-05T22:42:34.4190509Z at 
> java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1742)
>  2020-11-05T22:42:34.4191059Z at 
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908) 
> 2020-11-05T22:42:34.4191591Z at 
> org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:893)
>  2020-11-05T22:42:34.4192208Z at 
> org.apache.flink.graph.asm.dataset.DataSetAnalyticBase.execute(DataSetAnalyticBase.java:55)
>  2020-11-05T22:42:34.4192787Z at 
> org.apache.flink.graph.drivers.output.Print.write(Print.java:48) 
> 2020-11-05T22:42:34.4193373Z at 
> org.apache.flink.graph.Runner.execute(Runner.java:454) 
> 2020-11-05T22:42:34.4194156Z at 
> org.apache.flink.graph.Runner.main(Runner.java:507) 
> 2020-11-05T22:42:34.4194618Z at 
> org.apache.flink.graph.drivers.DriverBaseITCase.getSystemOutput(DriverBaseITCase.java:208)
>  2020-11-05T22:42:34.4195192Z at 
> org.apache.flink.graph.drivers.DriverBaseITCase.expectedCount(DriverBaseITCase.java:100)
>  2020-11-05T22:42:34.4195914Z at 
> org.apache.flink.graph.drivers.PageRankITCase.testPrintWithRMatGraph(PageRankITCase.java:60)
> {code}



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