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https://issues.apache.org/jira/browse/HADOOP-14946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16489671#comment-16489671
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Aaron Fabbri commented on HADOOP-14946:
---------------------------------------

Thanks guys.
{quote}NTP logs?
{quote}
Attempt at a joke / me grasping at an explanation for your last stack trace. :) 
A bogged-down system should result in "too many items pruned", (since "fresh" 
files become "stale") not "not enough items pruned" which is what was different 
about your last stack trace. I could only reproduce the former.
{quote}the other one would be to dynamically change the asserts
{quote}
Yeah. We could assert an OR of the two possibilities. That at least gives some 
sanity check.  Not sure how to do one exact value without a race.   Anyways, 
will probably just commit this for now since it appears to work, and revisit if 
it comes up again–unless you have other desires [[email protected]].

(Aside: Ideally we'd have a Timer or Ticker "fake time source" we could inject 
into S3AFileSystem and DynamoDBMS so we could precisely control time without 
doing this sleep stuff.  Another day).

> S3Guard testPruneCommandCLI can fail
> ------------------------------------
>
>                 Key: HADOOP-14946
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14946
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.0.0
>            Reporter: Steve Loughran
>            Assignee: Gabor Bota
>            Priority: Major
>         Attachments: HADOOP-14946.001.patch, HADOOP-14946.002.patch
>
>
> The test of the S3Guard CLI prune can sometimes fail on parallel test runs. 
> Assumption: it is the parallelism which is causing the problem
> {code}
> org.apache.hadoop.fs.s3a.s3guard.ITestS3GuardToolDynamoDB
> testPruneCommandCLI(org.apache.hadoop.fs.s3a.s3guard.ITestS3GuardToolDynamoDB)
>   Time elapsed: 10.765 sec  <<< FAILURE!
> java.lang.AssertionError: Pruned children count [] expected:<1> but was:<0>
>       at org.junit.Assert.fail(Assert.java:88)
> {code}



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