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https://issues.apache.org/jira/browse/HADOOP-18697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17715181#comment-17715181
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Viraj Jasani commented on HADOOP-18697:
---------------------------------------

While using eventual assertions is good idea, but it is alone not sufficient 
due to one minor race.

I am still testing the changes, will create a PR soon if things look good.

> transient failure of ITestS3APrefetchingInputStream.testRandomReadLargeFile
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-18697
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18697
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: 3.4.0
>            Reporter: Steve Loughran
>            Priority: Major
>
> intermittent failure of test; caller in uk, no VPN involved. does not always 
> surface
> {code}
> testRandomReadLargeFile(org.apache.hadoop.fs.s3a.ITestS3APrefetchingInputStream)
>   Time elapsed: 19.913 s  <<< FAILURE!
> org.junit.ComparisonFailure: [Gauge named stream_read_blocks_in_cache with 
> expected value 3] expected:<[3]L> but was:<[2]L>
> {code}



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