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https://issues.apache.org/jira/browse/HADOOP-13823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693792#comment-15693792
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Steve Loughran commented on HADOOP-13823:
-----------------------------------------
checkstyle is being fussy about param names, but may as well fix that
> s3a rename: fail if dest file exists
> ------------------------------------
>
> Key: HADOOP-13823
> URL: https://issues.apache.org/jira/browse/HADOOP-13823
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.7.3
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Critical
> Attachments: HADOOP-13813-branch-2-001.patch
>
>
> HIVE-15199 shows that s3a allows rename onto an existing file, which is
> something HDFS, azure and s3n do not permit (though file:// does). This is
> breaking bits of Hive, is an inconsistency with HDFS and a regression
> compared to s3n semantics.
> I propose: rejecting the rename on a file -> file rename if the destination
> exists (easy) and changing the s3a.xml contract file to declare the behavior
> change; this is needed for
> {{AbstractContractRenameTest.testRenameFileOverExistingFile}} to handle the
> changed semantics.
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