CAICAIIs opened a new pull request, #3192:
URL: https://github.com/apache/dubbo-go/pull/3192
问题:
1. 固定 ±50 容差对低权重目标（如 3.3% ≈ 33次期望）太严格，统计波动易超限
2. 使用 len(result) 作为 map key，不同 destination 产生相同长度时会覆盖权重
3. 样本量 1000 次不足以保证统计稳定性
修改：
| 修改项 | 原值 | 新值 |
|--------|------|------|
| 样本量 | 1000 | 5000 |
| Map key 类型 | any | int (明确类型) |
| 权重累加 | = (覆盖) | += (累加) |
| 容差算法 | 固定 ±50 | max(25% × expected, 50) |
| 断言 | assert.Fail("out of range") | assert.Truef() 带详细错误信息 |
### Description
Fixes #3176
### Checklist
- [x] I confirm the target branch is `develop`
- [x] Code has passed local testing
- [x] I have added tests that prove my fix is effective or that my feature
works
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