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https://issues.apache.org/jira/browse/HADOOP-14476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033028#comment-16033028
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Steve Loughran commented on HADOOP-14476:
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+mark factory classes as private/unstable, testing only, etc. I've already 
subclassed them, just to have a factory outside aws-test, and others may too

> make InconsistentAmazonS3Client usable in downstream tests
> ----------------------------------------------------------
>
>                 Key: HADOOP-14476
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14476
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: HADOOP-13345
>            Reporter: Steve Loughran
>
> It's important for downstream apps to be able to verify that s3guard works by 
> making the AWS client inconsistent (so demonstrate problems), then turn 
> s3guard on to verify that they go away. 
> This can be done by exposing the {{InconsistentAmazonS3Client}}
> # move the factory to the production source
> # make delay configurable for when you want a really long delay
> # have factory code log @ warn when a non-default factory is used.
> # mention in s3a testing.md
> I think we could look at the name of the option, 
> {{fs.s3a.s3.client.factory.impl}} too. I'd like something which has 
> "internal" in it, and without the duplication of s3a.s3



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