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Posted to notifications@dubbo.apache.org by "Alanxtl (via GitHub)" <gi...@apache.org> on 2026/05/30 10:48:05 UTC
[I] [metadata] 为应用级 metadata 全局状态补充并发安全 [dubbo-go]
Alanxtl opened a new issue, #3353:
URL: https://github.com/apache/dubbo-go/issues/3353
### 背景
`#2534` 将 metadata 相关逻辑集中到 metadata 模块后，应用级 metadata 通过全局状态维护本地 `MetadataInfo`、metadata report instances 和 `MetadataService`。这个 issue 只讨论应用级 metadata 主链路的并发安全。
相关代码：
- `metadata/metadata.go`
- `metadata/info/metadata_info.go`
- `metadata/report_instance.go`
- `registry/servicediscovery/service_instances_changed_listener_impl.go`
### 当前问题
当前多处核心状态是 map，但缺少清晰同步保护：
- `registryMetadataInfo` 是全局 map
- `MetadataInfo.Services` / `exportedServiceURLs` / `subscribedServiceURLs` 是 map
- metadata report `instances` 是全局 map
- 注册、订阅、实例变更、metadata service 查询可能并发发生
这可能带来 data race、stale read、并发 map 写 panic 等问题。
### 建议
- 为 metadata 全局状态增加明确的锁或并发安全容器
- 明确 `MetadataInfo` 的并发读写模型
- 在注册、注销、订阅、取消订阅、metadata service 查询链路补充并发测试
- 使用 `go test -race` 覆盖 metadata / servicediscovery 关键路径
- 避免直接暴露可被外部修改的内部 map / slice
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Re: [I] [FEATURE] Add concurrency safety for application-level metadata state / 为应用级 metadata 全局状态补充并发安全 [dubbo-go]
Posted by "Alanxtl (via GitHub)" <gi...@apache.org>.
Alanxtl closed issue #3353: [FEATURE] Add concurrency safety for application-level metadata state / 为应用级 metadata 全局状态补充并发安全
URL: https://github.com/apache/dubbo-go/issues/3353
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Re: [I] [FEATURE] Add concurrency safety for application-level metadata state / 为应用级 metadata 全局状态补充并发安全 [dubbo-go]
Posted by "jieguo-coder (via GitHub)" <gi...@apache.org>.
jieguo-coder commented on issue #3353:
URL: https://github.com/apache/dubbo-go/issues/3353#issuecomment-4582757768
Hello, may I try to do this?
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Re: [I] [FEATURE] Add concurrency safety for application-level metadata state / 为应用级 metadata 全局状态补充并发安全 [dubbo-go]
Posted by "Alanxtl (via GitHub)" <gi...@apache.org>.
Alanxtl commented on issue #3353:
URL: https://github.com/apache/dubbo-go/issues/3353#issuecomment-4797516651
close via #3367
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