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https://issues.apache.org/jira/browse/HADOOP-17499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17272928#comment-17272928
 ] 

Steve Loughran commented on HADOOP-17499:
-----------------------------------------

{code}
[ERROR] 
testInputStreamStatisticRead(org.apache.hadoop.fs.s3a.statistics.ITestS3AContractStreamIOStatistics)
  Time elapsed: 6.252 s  <<< FAILURE!
org.junit.ComparisonFailure: [Counter named stream_read_bytes with expected 
value 129] expected:<[129]L> but was:<[3]L>
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at 
org.apache.hadoop.fs.statistics.IOStatisticAssertions.verifyStatisticValue(IOStatisticAssertions.java:255)
        at 
org.apache.hadoop.fs.statistics.IOStatisticAssertions.verifyStatisticCounterValue(IOStatisticAssertions.java:173)
        at 
org.apache.hadoop.fs.contract.AbstractContractStreamIOStatisticsTest.verifyBytesRead(AbstractContractStreamIOStatisticsTest.java:283)
        at 
org.apache.hadoop.fs.contract.AbstractContractStreamIOStatisticsTest.testInputStreamStatisticRead(AbstractContractStreamIOStatisticsTest.java:226)
        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.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
        at 
org.junit.internal.runners.statements.FailOnTimeout$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}

> AbstractContractStreamIOStatisticsTest fails if read buffer not full
> --------------------------------------------------------------------
>
>                 Key: HADOOP-17499
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17499
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: 3.3.1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>
> {code}
> [ERROR] 
> testInputStreamStatisticRead(org.apache.hadoop.fs.s3a.statistics.ITestS3AContractStreamIOStatistics)
>   Time elapsed: 6.252 s  <<< FAILURE!
> org.junit.ComparisonFailure: [Counter named stream_read_bytes with expected 
> value 129] expected:<[129]L> but was:<[3]L>
>       at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> {code}
> Test should handle all cases where bytes read > 0



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