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https://issues.apache.org/jira/browse/HADOOP-14305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968074#comment-15968074
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Steve Loughran commented on HADOOP-14305:
-----------------------------------------

One thing that may be causing problems here is if mock empty dirs are 
encrypted. But we are only doing a HEAD of an 0-byte object. This may be enough 
to trigger a problem though, if the callers credentials are different from that 
used for the path entry. In which case, this is potentially serious: maybe all 
empty / paths need to be created with no-encryption for consistency.

If so: empty files/mock dirs should not be encrypted. That could be argued as 
disclosing information, but as listing talks about the files anyway, tough.

> S3A SSE tests to run in parallel
> --------------------------------
>
>                 Key: HADOOP-14305
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14305
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: 2.9.0
>            Reporter: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-14305-001.patch
>
>
> The S3a encryption tests all run in parallel (they were interfering with each 
> other, apparently). This adds ~1 min to the test runs.
> it should be straighforward for them to use unique names.



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