[ 
https://issues.apache.org/jira/browse/HDFS-16106?focusedWorklogId=617938&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-617938
 ]

ASF GitHub Bot logged work on HDFS-16106:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Jul/21 01:27
            Start Date: 02/Jul/21 01:27
    Worklog Time Spent: 10m 
      Work Description: tomscut opened a new pull request #3168:
URL: https://github.com/apache/hadoop/pull/3168


   JIRA: [HDFS-16106](https://issues.apache.org/jira/browse/HDFS-16106)
   
   This unit test occasionally fails.
   
   The value set for dfs.namenode.accesstime.precision is too low, result in 
the execution of the method, accesstime could be set many times, eventually 
leading to failed assert.
   
   IMO, dfs.namenode.accesstime.precision should be greater than or equal to 
the timeout(120s) of TestDFSShell#testCopyCommandsWithPreserveOption(), or 
directly set to 0 to disable this feature.
   
   ```[ERROR] Tests run: 52, Failures: 3, Errors: 0, Skipped: 0, Time elapsed: 
106.778 s <<< FAILURE! - in org.apache.hadoop.hdfs.TestDFSShell
   [ERROR] 
testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
elapsed: 2.353 s  <<< FAILURE!
   java.lang.AssertionError: expected:<1625095098319> but was:<1625095099374>
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.failNotEquals(Assert.java:835)
        at org.junit.Assert.assertEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:633)
        at 
org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2282)
        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$1.runReflectiveCall(FrameworkMethod.java:59)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.lang.Thread.run(Thread.java:748)
   
   [ERROR] 
testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
elapsed: 2.467 s  <<< FAILURE!
   java.lang.AssertionError: expected:<1625095192527> but was:<1625095193950>
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.failNotEquals(Assert.java:835)
        at org.junit.Assert.assertEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:633)
        at 
org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2323)
        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$1.runReflectiveCall(FrameworkMethod.java:59)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.lang.Thread.run(Thread.java:748)
   
   [ERROR] 
testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
elapsed: 2.173 s  <<< FAILURE!
   java.lang.AssertionError: expected:<1625095196756> but was:<1625095197975>
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.failNotEquals(Assert.java:835)
        at org.junit.Assert.assertEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:633)
        at 
org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2303)
        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$1.runReflectiveCall(FrameworkMethod.java:59)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
        at 
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.lang.Thread.run(Thread.java:748)```


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 617938)
    Remaining Estimate: 0h
            Time Spent: 10m

> Fix flaky unit test TestDFSShell
> --------------------------------
>
>                 Key: HDFS-16106
>                 URL: https://issues.apache.org/jira/browse/HDFS-16106
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: tomscut
>            Assignee: tomscut
>            Priority: Minor
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> This unit test occasionally fails.
> The value set for dfs.namenode.accesstime.precision is too low, result in the 
> execution of the method, accesstime could be set many times, eventually 
> leading to failed assert.
> IMO, dfs.namenode.accesstime.precision should be greater than or equal to the 
> timeout(120s) of TestDFSShell#testCopyCommandsWithPreserveOption(), or 
> directly set to 0 to disable this feature.
>  
> {code:java}
> [ERROR] Tests run: 52, Failures: 3, Errors: 0, Skipped: 0, Time elapsed: 
> 106.778 s <<< FAILURE! - in org.apache.hadoop.hdfs.TestDFSShell[ERROR] Tests 
> run: 52, Failures: 3, Errors: 0, Skipped: 0, Time elapsed: 106.778 s <<< 
> FAILURE! - in org.apache.hadoop.hdfs.TestDFSShell [ERROR] 
> testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
> elapsed: 2.353 s  <<< FAILURE! java.lang.AssertionError: 
> expected:<1625095098319> but was:<1625095099374> at 
> org.junit.Assert.fail(Assert.java:89) at 
> org.junit.Assert.failNotEquals(Assert.java:835) at 
> org.junit.Assert.assertEquals(Assert.java:647) at 
> org.junit.Assert.assertEquals(Assert.java:633) at 
> org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2282)
>  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$1.runReflectiveCall(FrameworkMethod.java:59)
>  at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>  at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>  at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
>  at java.util.concurrent.FutureTask.run(FutureTask.java:266) at 
> java.lang.Thread.run(Thread.java:748)
> [ERROR] 
> testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
> elapsed: 2.467 s  <<< FAILURE! java.lang.AssertionError: 
> expected:<1625095192527> but was:<1625095193950> at 
> org.junit.Assert.fail(Assert.java:89) at 
> org.junit.Assert.failNotEquals(Assert.java:835) at 
> org.junit.Assert.assertEquals(Assert.java:647) at 
> org.junit.Assert.assertEquals(Assert.java:633) at 
> org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2323)
>  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$1.runReflectiveCall(FrameworkMethod.java:59)
>  at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>  at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>  at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
>  at java.util.concurrent.FutureTask.run(FutureTask.java:266) at 
> java.lang.Thread.run(Thread.java:748)
> [ERROR] 
> testCopyCommandsWithPreserveOption(org.apache.hadoop.hdfs.TestDFSShell)  Time 
> elapsed: 2.173 s  <<< FAILURE! java.lang.AssertionError: 
> expected:<1625095196756> but was:<1625095197975> at 
> org.junit.Assert.fail(Assert.java:89) at 
> org.junit.Assert.failNotEquals(Assert.java:835) at 
> org.junit.Assert.assertEquals(Assert.java:647) at 
> org.junit.Assert.assertEquals(Assert.java:633) at 
> org.apache.hadoop.hdfs.TestDFSShell.testCopyCommandsWithPreserveOption(TestDFSShell.java:2303)
>  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$1.runReflectiveCall(FrameworkMethod.java:59)
>  at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>  at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
>  at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
>  at 
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
>  at java.util.concurrent.FutureTask.run(FutureTask.java:266) at 
> java.lang.Thread.run(Thread.java:748)
> {code}



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