[WIP] #1466
[WIP] #1466
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Summary of Changes
Hello @hongyunyan, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request enhances the robustness of the splitTableByRegionCount function by implementing a more comprehensive error handling and cleanup mechanism. It ensures that if any step in the operator creation process fails, all previously initiated operations are properly terminated, preventing resource leaks or orphaned tasks.
Highlights
- Operator Tracking: A new slice named
operatorsis introduced within thesplitTableByRegionCountfunction to keep track ofMergeSplitDispatcherOperatorinstances as they are created. - Robust Error Handling and Cleanup: Improved error handling logic has been added. If the
operatorController.AddOperatorcall fails (returnsfalse), the code now iterates through all previously added operators in theoperatorsslice and calls theirOnTaskRemoved()method. This ensures proper cleanup and prevents operators from being left in an unfinished state if a subsequent operator creation fails.
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Code Review
The pull request introduces crucial error handling and cleanup logic within the splitTableByRegionCount function. Specifically, it ensures that if an operator fails to be added, any previously added operators are properly removed, preventing potential resource leaks and state inconsistencies. This change significantly improves the robustness and reliability of the operator management in the system.
| // this op is created failed, so we need to remove the previous operators. Otherwise, the previous operators will never finish. | ||
| for _, op := range operators { | ||
| op.OnTaskRemoved() | ||
| } | ||
| return apperror.ErrOperatorIsNil.GenWithStackByArgs("unexpected error in create merge split dispatcher operator") |
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This for loop correctly addresses a critical issue where previously added operators might be left in an unmanaged state if c.operatorController.AddOperator(op) fails for a subsequent operator. Without this cleanup, those operators could indefinitely consume resources or block future operations, leading to system instability. The comment clearly explains the intent, which is excellent for maintainability. This is a significant improvement for the robustness of the system.
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What problem does this PR solve?
Issue Number: close #xxx
What is changed and how it works?
Check List
Tests
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note