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https://issues.apache.org/jira/browse/HADOOP-19256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17876385#comment-17876385
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ASF GitHub Bot commented on HADOOP-19256:
-----------------------------------------
diljotgrewal opened a new pull request, #7011:
URL: https://github.com/apache/hadoop/pull/7011
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### Description of PR
This PR adds support for S3 Conditional Write (Put-if-absent) capability
which is now generally available -
https://aws.amazon.com/about-aws/whats-new/2024/08/amazon-s3-conditional-writes/
### How was this patch tested?
We added integration tests within this PR which tests both mpu path and
regular put path, and confirms that we see a conflict if we try to mutate a
already existing key.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> Support S3 Conditional Writes
> -----------------------------
>
> Key: HADOOP-19256
> URL: https://issues.apache.org/jira/browse/HADOOP-19256
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Ahmar Suhail
> Priority: Major
>
> S3 Conditional Write (Put-if-absent) capability is now generally available -
> [https://aws.amazon.com/about-aws/whats-new/2024/08/amazon-s3-conditional-writes/]
>
> S3A should allow passing in this put-if-absent header to prevent over writing
> of files.
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