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https://issues.apache.org/jira/browse/NIFI-15397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pierre Villard updated NIFI-15397:
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Status: Patch Available (was: Open)
> Gitlab Registry Client should not warn when initializing a new flow
> -------------------------------------------------------------------
>
> Key: NIFI-15397
> URL: https://issues.apache.org/jira/browse/NIFI-15397
> Project: Apache NiFi
> Issue Type: Bug
> Components: Flow Versioning
> Affects Versions: 2.7.2
> Reporter: Daniel Chaffelson
> Assignee: Pierre Villard
> Priority: Minor
>
> # GitHubFlowRegistryClient: Spurious WARNING on Initial Commit
> **NiFi Version**: 2.7.2
> **Component**: `org.apache.nifi.github.GitHubFlowRegistryClient`
> ## Issue
> When committing a new flow to a GitHub-based Flow Registry, a WARNING-level
> bulletin and log message is generated:
> ```
> GitHubFlowRegistryClient[id=69ec8416-019b-1000-4f1d-cd46d79cdb90] Unable to
> get content SHA for [flows/default/test-flow-commit.json] from branch [main]
> because content does not exist
> ```
> The commit succeeds despite the warning. The file is created in the
> repository as expected.
> ## Hypothesis
> The GitHubFlowRegistryClient appears to attempt fetching the content SHA
> before writing, likely to determine whether to create or update the file. For
> initial commits, the file doesn't exist yet, so this lookup fails and logs a
> WARNING.
> This seems like expected behavior for new flows - the warning is cosmetic and
> may be better suited to DEBUG or INFO level.
> ## Reproduction
> ```bash
> # Using NiFi 2.7.2 Docker and nipyapi CLI
> # 1. Create a GitHub registry client
> nipyapi ci ensure_registry --profile single-user \
> --client_name test-registry \
> --repo <owner>/<repo> \
> --provider github \
> --default_branch main \
> --repository_path flows
> # 2. Create a process group
> nipyapi canvas create_process_group --profile single-user \
> root my-test-flow "(100,100)"
> # 3. Commit to registry (triggers the warning)
> nipyapi versioning save_git_flow_ver --profile single-user \
> <pg_id> \
> --registry_client test-registry \
> --bucket default \
> --flow_name my-test-flow \
> --comment "Initial commit"
> # 4. Check bulletins (within 5 minutes)
> nipyapi bulletins get_bulletins --profile single-user
> # 5. Check NiFi logs
> docker logs <nifi-container> 2>&1 | grep "Unable to get content SHA"
> ```
> ## NiFi Log Output
> ```
> 2025-12-29 11:52:12,215 WARN [NiFi Web Server-37]
> o.a.nifi.github.GitHubFlowRegistryClient
> GitHubFlowRegistryClient[id=69ec8416-019b-1000-4f1d-cd46d79cdb90] Unable to
> get content SHA for [flows/default/test-flow-commit.json] from branch [main]
> because content does not exist
> 2025-12-29 11:52:15,074 INFO [NiFi Web Server-37]
> o.a.nifi.groups.StandardProcessGroup Set Versioned Component ID of
> StandardProcessGroup[identifier=69f11df9-019b-1000-57af-53fcdafa9c98,name=test-flow-commit]
> to af124ed8-37fe-3238-b476-e7fa239f7a15
> ```
> ## Suggestion
> Consider logging "content does not exist" at DEBUG level when this occurs
> during an initial commit/create operation, reserving WARN for unexpected
> failures.
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