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https://issues.apache.org/jira/browse/HADOOP-13914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15894806#comment-15894806
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Aaron Fabbri commented on HADOOP-13914:
---------------------------------------
Sigh.. I did run test-patch on this before submitting. The compile error is a
Yarn UI Javascript issue (unrelated). The unit failure is TestKDiag
(unrelated). The findbugs warning is redundant null check we'd like to leave
in.
It does look like there are some legitimate checkstyle issues.. not sure why
test-patch reported it clean.
> s3guard: improve S3AFileStatus#isEmptyDirectory handling
> --------------------------------------------------------
>
> Key: HADOOP-13914
> URL: https://issues.apache.org/jira/browse/HADOOP-13914
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: HADOOP-13345
> Reporter: Aaron Fabbri
> Assignee: Aaron Fabbri
> Attachments: HADOOP-13914-HADOOP-13345.000.patch,
> HADOOP-13914-HADOOP-13345.002.patch, HADOOP-13914-HADOOP-13345.003.patch,
> HADOOP-13914-HADOOP-13345.004.patch, s3guard-empty-dirs.md,
> test-only-HADOOP-13914.patch
>
>
> As discussed in HADOOP-13449, proper support for the isEmptyDirectory() flag
> stored in S3AFileStatus is missing from DynamoDBMetadataStore.
> The approach taken by LocalMetadataStore is not suitable for the DynamoDB
> implementation, and also sacrifices good code separation to minimize
> S3AFileSystem changes pre-merge to trunk.
> I will attach a design doc that attempts to clearly explain the problem and
> preferred solution. I suggest we do this work after merging the HADOOP-13345
> branch to trunk, but am open to suggestions.
> I can also attach a patch of a integration test that exercises the missing
> case and demonstrates a failure with DynamoDBMetadataStore.
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