Abstract
功能增强和bug修复，该版本要求JDK8或以上版本，推荐所有5.5.X用户升级
Compatibility Note
- JDK8 required
- Consul registry redesigned, not compatible with 5.5.0
New Features
- support protostuff as serialization. #531 支持使用protobuf作为序列化协议
- support fetch groupName by provide. #550
- make user can set processInIoThread. #544
Enhancement
- 升级依赖到zk4.0.1，以提供对spring cloud的支持 #386
- 大幅度增强consul注册中心 #629
- add use sofa-registry demo. #644
- allow timeout discard settings. #676
Bug Fix
- fix memory leak. #658
- fix typo, SofaRegsitryClient -> SofaRegistryClient. #581
- fix elastic percent typo. #674
- move providerConfig#setMethodsLimit out of for-loop. #657
- mapSerializer support empty. [#654]
来源：https://github.com/sofastack/sofa-rpc/releases/tag/v5.6.0