[jira] [Created] (HDDS-16622) S3 conditional writes: If-None-Match with entity ETag should return 412 PreconditionFailed

["Wei-Chiu Chuang (Jira)" <ji...@apache.org>]

Wei-Chiu Chuang created HDDS-16622:
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             Summary: S3 conditional writes: If-None-Match with entity ETag should return 412 PreconditionFailed
                 Key: HDDS-16622
                 URL: https://issues.apache.org/jira/browse/HDDS-16622
             Project: Apache Ozone
          Issue Type: Sub-task
          Components: Ozone Manager, s3gateway
            Reporter: Wei-Chiu Chuang


h2. Problem
Two ceph/s3-tests {{conditional_write}} cases reach conditional PUT/MPU logic but fail AWS parity for {{If-None-Match}} with a concrete entity ETag on an existing object.

h2. Expected (AWS S3 / s3-tests)
* HTTP 412 {{PreconditionFailed}} when {{If-None-Match}} matches the current object ETag.

h2. Actual (Ozone S3 Gateway)
* HTTP 400 {{InvalidRequest}} with message that only {{If-None-Match: *}} is supported for conditional put ({{S3ConditionalRequest.parseWriteConditions}}).

h2. Affected tests (2/7 in conditional_write)
* {{test_put_object_if_match}}
* {{test_multipart_put_object_if_match}}

h2. Evidence
* Nightly report: [Apache Ozone S3 Compatibility Report|https://ozone.s3.peterxcli.dev/#trend-panel-section]
* Same {{conditional_write}} feature group; failures stable across nightly runs.

h2. Implementation notes (for a future fix)
* Evaluate non-wildcard {{If-None-Match}} against current ETag and return 412 when it matches; allow non-matching ETag to proceed (AWS behavior).
* Apply consistently to {{PutObject}} and {{CompleteMultipartUpload}} (both use {{parseWriteConditions}}).

h2. Related work
Follow-up to resolved HDDS-13919 (S3 Conditional Writes PutObject) and HDDS-15067 (Conditional CompleteMultipartUpload).
Parent: HDDS-13117



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