Nacos 四周年，2.1.1 及 1.4.4 版本同时发布

2022年7月，为了庆祝 Nacos 开源四周年，其开发团队同时推出 2.1.1 和 1.4.4 两个新版本。未来，他们将全面启动 Nacos 3.0 项目，统一控制面，加大生态集成，全面提升体验。

以下内容来自发布公告。

新版本发布

2.1.1 版本特性

该版本核心解决 Nacos 2.0 广泛使用暴露出的一些稳定性问题（包括默认实现鉴权插件、Grpc请求和distro一致性协议的性能等），另外Beta测试“批量注册服务”和“服务追踪事件”两个新功能。

具体变更内容可查看changeLog：

 ## Features [#5863] (BETA) Support batch register service. [#7424] Add version data compare in the history list. [#8305] (REMOVE) Remove leave nacos server nodes API temporarily. [#8481] (BETA) Add TRACE Event to server. [#8755] Add default fuzzy search feature.  ## Enhancement [#8099] Fast failure for distro sync task and verify task if cluster disconnect. [#8150] Add the namespace description item to the namespace list page. [#8345] Add validation for service cluster name. [#8515] Optimize some code in InetUtils. [#8561] Enhance default authentication plugin performance. [#8574] Enhance filter service info for push callback. [#8592] Ehhance GrpcUtil memory and cpu cost. [#8622] Add NacosEnvironment and add some unit tests.  ## Refactor&dependency [#8369] Remove mina dependency. [#8383] Upgrade jackson version to 2.12.6.1. [#8421] Remove commonOkHttp dependency. [#8472] Remove useless dependency. [#8479] Refactor singleton construction as private. [#8540] Upgrade spring-boot version to 2.6.8. [#8594] Makes distro data load timeout can be configured. [#8596] Explicitly specify spring-boot-maven-plugin version same as spring-boot. [#8623] Upgrade mysql-connector-java to 8.0.28.  ## BugFix [#7039] Fix config encryptedData md5 calculation problem. [#8153] Fix NPE for AutoExpireCache. [#8243][#8653] Fix health check plugin problem. [#8275] Fix can't register service when use skywalking. [#8295] Fix can't login when use embedded storage in cluster model. [#8318] Fix findAllConfigInfoForDumpAll sql args error. [#8372] Fix client can't use https connection. [#8424] Fix cycle dependency problem. [#8428] Fix naming subscribe bug when multiple NamingService. [#8505] Fix log configuration conflict in spring-boot project. [#8514][#8539] Fix prometheus api error in client. [#8516] Fix the persistent instance becomes a temporary instance. [#8602] Fix display error after delete current namespace. [#8632] Fix subscribe disabled instance problem in the first time. [#8635] Fix NPE when call the shutdown method. [#8720] Fix the problem that config aspect invalid problem. [#8742] Fix change instance metadata, the revision of service not change. [#8784] Fix some bugs for Console UI. [#8833] Fix import config failed when open auth. [#8880] Fix constantly loading config when not read permission.

批量注册服务 -- batchRegister

批量注册服务的需求主要来自于Nacos社区的另一个组件 -- Nacos-Sync，Nacos-Sync作为一个支持多注册中心迁移的第三方工具，一直帮助社区用户平滑的从Eureka，Consul等其他注册中心迁移到Nacos中。

在Nacos2.0发布后，Nacos-Sync第一时间进行了更新。但在更新后，由于Nacos2.0的注册机制发生了一定的变化，同一个客户端针对同一个服务只能注册一个实例，这导致了Nacos-Sync这种代理服务模式无法使用同一个客户端进行同一个服务的多个实例的代理注册，易用性大大降低。

同时社区发现，有一些特殊的应用，如网关，proxy，dubbo3多协议支持等，也需要一些代理注册的能力，因此社区在进行数次方案讨论后，最终由社区同学chenhao26-nineteen完成批量注册服务的功能开发，并在2.1.1版本进行beta测试。

批量注册服务功能主要用于代理注册的场景，允许应用使用同一个客户端对同一个服务进行多个实例的注册请求。大多数传统使用场景下，用户仍然使用registerService功能即可。

服务追踪事件 -- trace event

自从阿里云的MSENacos发布了关于推送轨迹相关的文章后，社区反响热烈，都希望能在开源添加对应的功能。

MSE团队得知社区的强烈需求后，由scienceZ同学完成对事件抽象剥离，并贡献到开源社区。

目前该功能同样属于beta测试，暂时只能通过在源码中订阅对应事件的方式进行追踪，后续版本同样会将该功能作为SPI插件的形式开放，方便社区同学按照自己的需求定制推送轨迹。

注意：上述两个功能均属于Beta测试阶段，其API，功能可能与后续正式发布时的有一定区别。

1.4.4 版本特性

Nacos 1.X版本已经不再进行功能演进，只进行一些bugfix和优化，因此本次版本发布主要也是进行一些bug的修复和优化，并且将一些可能有问题的依赖进行升级；建议大家尽快升级到 Nacos 2.0，以便享受快速迭代红利！

具体变更内容可查看changeLog：

 # Enhancement [#5344] Reset raft cluster ops for no leader by JRaft Api. [#5884][#7810] Add the permission for history config. [#7284] Enhance print exception details. [#7799] Enhance console exception handler. [#7802] Enhance thread pool manager. [#7801] Enhance connection release timeout between server. [#7803] Apply some Jraft Enhancement from 2.X. [#7925] Client stops the UpdateTask after a service is unsubscribed. [#8072] Reduce memory cost in DistroProtocol initialization to avoid OutOfMemoryError. [#8144] Add volatile modifier to NamingProxy.serversFromEndpoint. [#8203] Fix the concurrency problem about the iterator of ServerListManager. [#8434] Enhance DistroConsistencyServiceImpl listen/unListen.  # BugFix [#6198][#7809] Fix StringUtils.join throw NullPointerException. [#6273] Fix loop leave server. [#7141][#7804] Fix the problem of the operator column being empty while configuring adding and deleting records. [#7750][#7869] Fix bug in permissions management module, such as redundant 'nacos,' when change password. [#7757][#7761] Fix jraft request parse failed problem. [#7807] Fix yaml parse concurrent problem. [#7836] Fix nacos-client can't parse `localhost` problem. [#8012] Fix NPE in DistroConsistencyServiceImpl.Notifier. [#8283] Fix thread safety problem when concurrently registering with the same cluster. [#8428] Fix naming subscribe bug when multiple NamingService . [#8539] Fix prometheus api error.  # Dependency [#7813] Upgrade log4j2 to 2.17.1. [#7813] Upgrade logback to 1.2.9. [#7813] Upgrade Jraft to 1.3.9. [#8421] Remove commonOkHttp dependency. [#8169] Upgrade spring-boot version to 2.6.6.