Bablu Raul created HDDS-17308:
---------------------------------
Summary: ListObjectsV2 Incorrectly Filters CommonPrefixes When
StartAfter Is Before the Matching Prefixes
Key: HDDS-17308
URL: https://issues.apache.org/jira/browse/HDDS-17308
Project: Apache Ozone
Issue Type: Bug
Components: S3
Reporter: Bablu Raul
When the S3 {{ListObjectsV2}} API is called with the {{{}Prefix{}}},
{{{}Delimiter{}}}, and {{StartAfter}} parameters, the Ozone S3 Gateway
incorrectly excludes matching common prefixes that sort lexicographically after
the specified {{StartAfter}} value.
For example, the bucket contains the following object keys:
* {{dir1bh/file1}}
* {{dir1bha/file1}}
A request with {{Prefix=dir1bh}} and {{Delimiter=/}} correctly returns the
common prefixes {{dir1bh/}} and {{{}dir1bha/{}}}.
However, when the same request includes {{{}StartAfter=dir1/dir2/file1{}}},
neither common prefix is returned, even though both sort lexicographically
after the specified value.
h2. Steps to Reproduce
# Configure and start the Ozone S3 Gateway.
# Ensure that the bucket contains the following objects:
** {{dir1bh/file1}}
** {{dir1bha/file1}}
# Execute {{ListObjectsV2}} with the prefix:
{{aws s3api list-objects-v2 \
--bucket "$BUCKET" \
--prefix dir1bh}}
Both matching object keys are returned.
# Execute {{ListObjectsV2}} with the prefix and delimiter:
{{aws s3api list-objects-v2 \
--bucket "$BUCKET" \
--prefix dir1bh \
--delimiter /}}
The response contains both common prefixes:
{{{
"CommonPrefixes": [
\{"Prefix": "dir1bh/"},
\{"Prefix": "dir1bha/"}
],
"Prefix": "dir1bh"
}}}
# Add the {{StartAfter}} parameter:
{{aws s3api list-objects-v2 \
--bucket "$BUCKET" \
--prefix dir1bh \
--delimiter / \
--start-after 'dir1/dir2/file1'}}
h2. Actual Result
The response does not contain the {{CommonPrefixes}} field, and neither
{{dir1bh/}} nor {{dir1bha/}} is returned.
h2. Expected Result
The response should include both {{dir1bh/}} and {{{}dir1bha/{}}}, because both
common prefixes sort lexicographically after the specified {{StartAfter}} value.
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