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https://issues.apache.org/jira/browse/HDFS-15146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shilun Fan updated HDFS-15146:
------------------------------
          Component/s: balancer
                       test
     Target Version/s: 2.10.1, 3.2.2, 3.3.0, 3.4.0
    Affects Version/s: 2.10.1
                       3.2.2
                       3.3.0
                       3.4.0

> TestBalancerRPCDelay. testBalancerRPCDelayQpsDefault fails intermittently
> -------------------------------------------------------------------------
>
>                 Key: HDFS-15146
>                 URL: https://issues.apache.org/jira/browse/HDFS-15146
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: balancer, test
>    Affects Versions: 3.3.0, 3.2.2, 2.10.1, 3.4.0
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Minor
>             Fix For: 3.3.0, 3.2.2, 2.10.1, 3.4.0
>
>         Attachments: HDFS-15146-branch-2.10.001.patch, HDFS-15146.001.patch
>
>
> TestBalancerRPCDelay.testBalancerRPCDelayQpsDefault fails intermittently when 
> the number of blocks does not match the expected. In 
> {{testBalancerRPCDelay}}, it seems like some datanodes will not be up by the 
> time we fetch the block locations.
> I see the following stack trace:
> {code:bash}
> [ERROR] Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 
> 39.969 s <<< FAILURE! - in 
> org.apache.hadoop.hdfs.server.balancer.TestBalancerRPCDelay
> [ERROR] 
> testBalancerRPCDelayQpsDefault(org.apache.hadoop.hdfs.server.balancer.TestBalancerRPCDelay)
>   Time elapsed: 12.035 s  <<< FAILURE!
> java.lang.AssertionError: Number of getBlocks should be not less than 20
>       at org.junit.Assert.fail(Assert.java:88)
>       at org.junit.Assert.assertTrue(Assert.java:41)
>       at 
> org.apache.hadoop.hdfs.server.balancer.TestBalancer.testBalancerRPCDelay(TestBalancer.java:2197)
>       at 
> org.apache.hadoop.hdfs.server.balancer.TestBalancerRPCDelay.testBalancerRPCDelayQpsDefault(TestBalancerRPCDelay.java:53)
>       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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
>       at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>       at java.lang.Thread.run(Thread.java:748)
> {code}



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