Merge pull request #10898 from terry-xiaoyu/add-live-connections-in-nodes-api

chore: update change logs

changes/v4.4.19-en.md

@@ -1,11 +1,11 @@
 # v4.4.19
 
+## Enhancements
+
 - Added support for TCP keep-alive in MQTT/TCP and MQTT/SSL listeners [#10854](https://github.com/emqx/emqx/pull/10854).
 
   A new configuration option has been added: `zone.<zone-name>.tcp_keepalive = Idle,Interval,Probes`. Users can enable the TCP layer's Keep Alive feature and specify time parameters using this configuration. This configuration is only effective on Linux and MacOS systems.
 
-## Enhancements
-
 - Improving error logs related to Proxy Protocol [emqx/esockd#177](https://github.com/emqx/esockd/pull/177).
 
   The sample logs before this improvement:
@@ -25,6 +25,10 @@
 
 - Adds a new feature to enable client certificate extended key usage validation for TLS listeners[#10669](https://github.com/emqx/emqx/pull/10669).
 
+- Added the `live_connections` field in the HTTP API `/api/v4/nodes` response [#10859](https://github.com/emqx/emqx/pull/10859).
+
+  Previously, this interface had a `connections` field, which represented the number of active connections on the current node that had not expired. This means that even if the MQTT connection has been disconnected, as long as the client has a persistent session, it would still be counted in the `connections` field. The newly added `live_connections` field specifically counts the number of clients with MQTT connections that have not been disconnected.
+
 ## Bug fixes
 
 - Fixed an issue where the rule engine was unable to access variables exported by `FOREACH` in the `DO` clause [#10620](https://github.com/emqx/emqx/pull/10620).

changes/v4.4.19-zh.md

@@ -21,10 +21,14 @@
   2023-04-20T18:10:17.205436+08:00 [error] [esockd_proxy_protocol] The listener 127.0.0.1:8883 is working in proxy protocol mode, but timed out while waiting for proxy_protocol header
   ```
 
-- 增加了一个新功能，为 TLS 监听器启用部分证书链验证[#10553](https://github.com/emqx/emqx/pull/10553)。
+- 增加了一个新功能，为 TLS 监听器启用部分证书链验证 [#10553](https://github.com/emqx/emqx/pull/10553)。
 
 - 增加了一个新功能，为 TLS 监听器启用客户端证书扩展密钥使用验证 [#10669](https://github.com/emqx/emqx/pull/10669)。
 
+- 在 HTTP API `/api/v4/nodes` 的返回中增加 `live_connections` 字段 [#10859](https://github.com/emqx/emqx/pull/10859)。
+
+  此前该接口中有一个 `connections` 字段，它代表当前节点上会话未过期的连接数量。这意味着即使 MQTT 连接已经断开，只要客户端保持了会话，它仍然会被统计在 `connections` 中。新增的 `live_connections` 字段则仅仅统计 MQTT 连接未断开的客户端数量。
+
 ## 修复
 
 - 修复规则引擎无法在 `DO` 子句中访问 `FOREACH` 导出的变量的问题 [#10620](https://github.com/emqx/emqx/pull/10620)。