jrebmann opened a new pull request, #11727:
URL: https://github.com/apache/nifi/pull/11727

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   # Summary
   
   [NIFI-16391](https://issues.apache.org/jira/browse/NIFI-16391) - 
GitLabRepositoryClient: limit commit listing to the first page instead of 
paging the full history
   
   GitLabRepositoryClient.getCommits(path, branch) uses the gitlab4j List 
overload, which internally delegates to Pager.all(). As a result, every call 
pages the entire commit history for the path (the client sets per_page=100). 
The commit listing should be bounded to the first page using a small, fixed 
page size (COMMIT_PAGE_SIZE).
   
   ## Environment / Observation
   Self-hosted GitLab, many versioned process groups.
   High volume of GitLab REST API calls (repository/commits) originating from 
NiFi.
   Each individual getCommits(...) call is itself several page requests, 
because the full history is paged through.
   Root Cause
   The use of Pager.all() in the GitLab client causes full-history paging on 
every call. The complete history is not required to determine the latest 
version or the version listing; the relevant commits are on the first page.
   
   ## Proposed Solution
   1. In GitLabRepositoryClient.getCommits(path, branch), replace the 
Pager.all()-based overload with a call bounded to the first page.
   2. Introduce a COMMIT_PAGE_SIZE constant with a small value (hard-coded 
initially; promotion to a property is an optional follow-up).
   3. This bounds both the number of page requests per call and the payload 
size.
   
   ## Notes / Relationship
   - Mirrors the listing limit from 
[NIFI-14837](https://issues.apache.org/jira/browse/NIFI-14837) / PR #10186, 
which was applied only to GitHubRepositoryClient; GitLab does not have this 
limit yet.
   - Out of scope: This issue covers only the bounding of the commit listing in 
the GitLab client. Removing the per-process-group multiplier (TTL cache in 
AbstractGitFlowRegistryClient) and the optional (commitSha, path) content cache 
are not part of this ticket.
   - The SHA→commit-detail cache from PR #10186 is not relevant for GitLab, 
because the gitlab4j commit listing returns fully-populated Commit objects.
   References
   [NIFI-14837](https://issues.apache.org/jira/browse/NIFI-14837), PR 
https://github.com/apache/nifi/pull/10186
   
   # Tracking
   
   Please complete the following tracking steps prior to pull request creation.
   
   ### Issue Tracking
   
   - [Apache NiFi Jira](https://issues.apache.org/jira/browse/NIFI) issue 
created
   
   ### Pull Request Tracking
   
   - Pull Request title starts with Apache NiFi Jira issue number, such as 
`NIFI-00000`
   - Pull Request commit message starts with Apache NiFi Jira issue number, as 
such `NIFI-00000`
   - Pull request contains [commits 
signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits)
 with a registered key indicating `Verified` status
   
   ### Pull Request Formatting
   
   - Pull Request based on current revision of the `main` branch
   - Pull Request refers to a feature branch with one commit containing changes
   
   # Verification
   
   Please indicate the verification steps performed prior to pull request 
creation.
   
   ### Build
   
   - [X] Build completed using `./mvnw clean install -P contrib-check`
     - [X] JDK 21
     - [X] JDK 25
   
   ### Licensing
   
   - [X] New dependencies are compatible with the [Apache License 
2.0](https://apache.org/licenses/LICENSE-2.0) according to the [License 
Policy](https://www.apache.org/legal/resolved.html)
   - [X] New dependencies are documented in applicable `LICENSE` and `NOTICE` 
files
   
   ### Documentation
   
   - [X] Documentation formatting appears as expected in rendered files
   


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