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https://issues.apache.org/jira/browse/HADOOP-19627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18008028#comment-18008028
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Ahmar Suhail commented on HADOOP-19627:
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I'll get a PR out for this today
> testIfMatchOverwriteWithOutdatedEtag() fails when not using SSE-KMS
> -------------------------------------------------------------------
>
> Key: HADOOP-19627
> URL: https://issues.apache.org/jira/browse/HADOOP-19627
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.5.0, 3.4.2
> Reporter: Ahmar Suhail
> Priority: Major
>
> ITestS3APutIfMatchAndIfNoneMatch.testIfMatchOverwriteWithOutdatedEtag() fails
> when no encryption method is set.
>
> This is because it does
> createFileWithFlags(fs, path, SMALL_FILE_BYTES, true, null);
>
> and then to overwrite the file, also does
>
> createFileWithFlags(fs, path, SMALL_FILE_BYTES, true, null);
>
> When no encryption is used, the eTAG is the md5 of the object, and so will
> always be the same, and won't result in the 412 conditional write failure.
>
> Test passes when using SSE-KMS, as when using encryption, eTag is no longer
> the md5 of the object content, and changes on every write.
>
>
> Fix is simple enough, change the object content on the second write.
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