fix TestDedup2

[jiangxinmeng1]

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #13881

What this PR does / why we need it:

Fix data race in TestDedup2

[CLAassistant]

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[matrix-meow]

@jiangxinmeng1 Thanks for your contributions!

Pull Request Review:

Title:

The title of the pull request is clear and concise, indicating that it fixes an issue related to TestDedup2.

Body:

The body of the pull request provides essential information about the type of PR (BUG), the specific issue it fixes (issue #13881), and the reason for the PR (Fix data race in TestDedup2). This information is helpful for understanding the context of the changes.

Changes:

1. In the executor.go file:
   • Lines 191-203: The changes involve modifying the ExecuteFor function in the MergeExecutor struct. The code now creates a new MergeObjectsTask and adds an observer before returning the task and error. Additionally, the line task.AddObserver(e) has been moved above logMergeTask function call.

Feedback and Suggestions for Improvement:

1. Data Race Fix:

   • The pull request mentions fixing a data race in TestDedup2, but the changes provided do not directly address a data race issue. It seems the changes are related to adding an observer to the MergeObjectsTask. If the data race issue is not resolved by these changes, further investigation is needed to identify and fix the data race problem.
   • To address a data race, ensure that shared data accessed concurrently by multiple goroutines is properly synchronized using techniques like mutexes or channels to prevent race conditions.

2. Observer Addition:

   • Adding an observer to the MergeObjectsTask is a valid change, but it's important to ensure that this modification aligns with the intended functionality and design of the codebase.
   • Verify that adding the observer does not introduce any unintended side effects or break existing functionality. Consider reviewing the observer pattern implementation to ensure it is correctly integrated.

3. Code Optimization:

   • Consider refactoring the code to improve readability and maintainability. Ensure that the code follows consistent formatting and style guidelines to enhance code quality.
   • It might be beneficial to provide comments or documentation explaining the purpose of adding the observer and how it contributes to the overall functionality of the MergeExecutor.

4. Testing:

   • Since this PR is related to fixing a bug, it is crucial to include relevant test cases to cover the fixed issue and prevent regressions. Ensure that the changes are thoroughly tested to validate the correctness of the fix.

5. Security Considerations:

   • While the changes in this PR do not appear to introduce security vulnerabilities directly, it is essential to conduct a comprehensive security review of the codebase to identify and address any potential security risks.

By addressing the mentioned points and ensuring thorough testing, the quality and reliability of the codebase can be improved. Additionally, collaborating with team members for code reviews and feedback can help in refining the changes further.