dubbo-2.6.1

Refactor

• Stripping OPS modules such as dubbo-admin, dubbo-monitor, etc. to a separate repo, #1209.
• Refactor project dependency and package structure: serialization as a standalone module, all submodules can deploy to remote repository separately, #1322.

Enhancements & Bugfixes

• Support build in java 9, #1283.
• Avoid blocking problems of hessian serailization in high concurrency scenarios, #1196.
• Change default ZK client to "curator", #1186.
• Avoid retry when parameter validation fails, #1031.
• Remove dubbo destroy logic from spring bean destroy process.
• Add "oninvoke" parse, #1353.
• Other small bugs or polish.

重构

• 将dubbo-admin, dubbo-monitor等OPS模块剥离到一个单独的工程仓库中, #1209.
• 重构工程依赖和包结构: 序列化作为一个单独的模块，所有的子模块可以单独部署到远程仓库中, #1322.

功能增强 & 问题修复

• 支持在java 9中的构建, #1283.
• 避免在高并发场景中，hessian序列化的阻塞问题, #1196.
• 将默认的ZK客户端替换为 "curator", #1186.
• 在参数校验失败时避免重试, #1031.
• 在spring bean销毁流程中去除dubbo销毁逻辑.
• 增加 "oninvoke" 解析, #1353.
• 其它问题修复.