12 Coding Anti‑Patterns That Sabotage Your Microservice Projects (And How to Avoid Them)

1. One Table per Microservice

The developer embraces microservices to the extreme, creating a separate service for every database table, which leads to a sprawling architecture, excessive RPC calls, versioning headaches, and difficult deployments for new team members.

2. Refactoring Without Production Rollout

After refactoring, the new logic is only enabled in the test environment, leaving production unchanged; new developers mistakenly modify the “new logic” without realizing the feature flag is off, causing failed releases and overtime.

3. Methods Longer Than 1,000 Lines

Long, monolithic methods are believed to improve readability and showcase skill, but they make onboarding new developers painfully slow and increase bug risk.

4. Deeply Nested Control Structures

Excessive nesting of if/try/catch blocks creates unreadable code that overwhelms newcomers, despite the author’s confidence in its correctness.

5. Random Variable Names

Variables are named arbitrarily (e.g., str1, list2) to appear artistic, which later leads to confusion and forgotten meanings.

6. Misleading Comments

Comments are deliberately altered to convey incorrect information, causing new developers to waste time deciphering false guidance.

7. Ignoring Comment Updates

Code changes are made without updating existing comments, resulting in mismatched documentation and further confusion.

8. Copy‑Paste Code

Code is duplicated across the codebase instead of being refactored, leading to duplicated bugs and increased maintenance effort.

9. Ignoring Technical Specs

Complex technical designs are written but ignored during implementation, causing a gap between documentation and actual code.

10. No Logging

The developer never adds logs, making troubleshooting impossible when production issues arise.

11. Overkill Frameworks for Simple Problems

Heavyweight rule‑engine frameworks are introduced to solve trivial strategy selection, adding unnecessary complexity.

12. Reinventing Wheels

Instead of using proven libraries (e.g., Redisson for distributed locks), custom solutions are built, often introducing bugs while providing little benefit.

Conclusion

These practices severely degrade code readability and maintainability; developers should avoid them to build clean, maintainable systems.

Author: 五阳神功 Source: juejin.cn/post/7286155742850449471