[cherry-pick-16424] : add log to track 16273

[jensenojs]

User description

What type of PR is this?

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

Which issue(s) this PR fixes:

issue #16273

What this PR does / why we need it:

add log to track 16273

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PR Type

Bug fix

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Description

• Added detailed error logging in the Delete function of engine.go to track issues related to database deletion failures.
• Included stack trace and transaction metadata in the logs when the database name contains "sysbench_db".

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Changes walkthrough 📝

	Relevant files
Bug fix	engine.go Add detailed error logging in `Delete` function                    pkg/vm/engine/disttae/engine.go Added import for stack package. Modified Delete function to include error logging. Added detailed error logs for Delete function when the database name contains "sysbench_db". +12/-1

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PR Review 🔍

⏱️ Estimated effort to review [1-5]	2, because the PR involves a moderate amount of changes with the addition of error handling and logging in a specific function. The logic is straightforward, focusing on enhanced error reporting, which makes it relatively easy to review.
🧪 Relevant tests	No
⚡ Possible issues	Error Handling Scope: The error handling and logging are scoped only to database names containing "sysbench_db". This might not catch errors in other databases which could also benefit from detailed error logs.
	Logging Verbosity: The addition of stack trace logging could potentially lead to verbose logs, especially in production environments, which might affect log readability and management.
🔒 Security concerns	No

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PR Code Suggestions ✨

Category	Suggestion	Score
Possible bug	Add a nil check for op.Txn() to prevent potential nil pointer dereference Ensure that the op.Txn() call is safe and cannot result in a nil pointer dereference by adding a nil check before calling DebugString(). pkg/vm/engine/disttae/engine.go [541] -logutil.Errorf("txnmeta %v", op.Txn().DebugString()) +if txn := op.Txn(); txn != nil { + logutil.Errorf("txnmeta %v", txn.DebugString()) +} else { + logutil.Errorf("txnmeta is nil") +} Suggestion importance[1-10]: 8 Why: Adding a nil check before accessing methods on potentially nil objects is crucial to prevent runtime errors such as nil pointer dereferences, making this a valuable suggestion.	8
Maintainability	Extract the logging logic into a separate function to improve readability and maintainability To improve readability and maintainability, consider extracting the logging logic into a separate function. This will make the Delete function cleaner and easier to understand. pkg/vm/engine/disttae/engine.go [538-542] -if strings.Contains(name, "sysbench_db") { - logutil.Errorf("delete database %s failed: %v", name, err) - logutil.Errorf("stack: %s", stack.Callers(3)) - logutil.Errorf("txnmeta %v", op.Txn().DebugString()) +logDeleteError(name, err, op) + +func logDeleteError(name string, err error, op client.TxnOperator) { + if strings.Contains(name, "sysbench_db") { + logutil.Errorf("delete database %s failed: %v", name, err) + logutil.Errorf("stack: %s", stack.Callers(3)) + logutil.Errorf("txnmeta %v", op.Txn().DebugString()) + } } Suggestion importance[1-10]: 7 Why: Extracting the logging logic into a separate function is a good practice for maintainability and readability, especially when the logging is non-trivial as in this case.	7
Possible issue	Use a more specific condition to check the database name to avoid false positives Instead of using strings.Contains to check if the name contains "sysbench_db", consider using a more specific condition if possible. This will avoid potential false positives where "sysbench_db" might be a substring of another name. pkg/vm/engine/disttae/engine.go [538] -if strings.Contains(name, "sysbench_db") { +if name == "sysbench_db" { Suggestion importance[1-10]: 5 Why: The suggestion to use a more specific condition is valid to avoid false positives, but changing to an exact match might not cover all intended cases if 'sysbench_db' is a prefix or category rather than a specific identifier.	5
Enhancement	Reduce the stack trace depth to capture a more relevant part of the stack trace Consider reducing the stack trace depth from 3 to 2 in stack.Callers(3) to capture a more relevant part of the stack trace, as the current depth might include unnecessary frames. pkg/vm/engine/disttae/engine.go [540] -logutil.Errorf("stack: %s", stack.Callers(3)) +logutil.Errorf("stack: %s", stack.Callers(2)) Suggestion importance[1-10]: 3 Why: The suggestion to adjust the stack trace depth is minor and its impact is uncertain without specific knowledge of the call stack's relevance at different depths.	3