diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 1a10daf..ac21510 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -38,7 +38,8 @@
       "PowerShell($env:JAVA_HOME = 'C:\\\\Program Files\\\\Java\\\\jdk-17'; & 'C:\\\\software\\\\apache-maven-3.8.9\\\\bin\\\\mvn.cmd' -pl rdms-project/rdms-project-boot -am test-compile '-Dsurefire.failIfNoSpecifiedTests=false' | Select-String -Pattern 'ERROR|BUILD|FAIL' | Select-Object -Last 40)",
       "PowerShell($env:JAVA_HOME = 'C:\\\\Program Files\\\\Java\\\\jdk-17'; & 'C:\\\\software\\\\apache-maven-3.8.9\\\\bin\\\\mvn.cmd' -pl rdms-project/rdms-project-boot test '-Dsurefire.failIfNoSpecifiedTests=false' | Select-String -Pattern 'Tests run|BUILD|FAILED|ERROR' | Select-Object -Last 80)",
       "Skill(code-review:code-review)",
-      "Bash(Test-Path *)"
+      "Bash(Test-Path *)",
+      "Skill(superpowers:systematic-debugging)"
     ]
   }
 }
diff --git a/rdms-gateway/src/main/java/com/njcn/rdms/gateway/filter/grey/GrayLoadBalancer.java b/rdms-gateway/src/main/java/com/njcn/rdms/gateway/filter/grey/GrayLoadBalancer.java
index 19fefce..24e0de7 100644
--- a/rdms-gateway/src/main/java/com/njcn/rdms/gateway/filter/grey/GrayLoadBalancer.java
+++ b/rdms-gateway/src/main/java/com/njcn/rdms/gateway/filter/grey/GrayLoadBalancer.java
@@ -99,7 +99,8 @@ public class GrayLoadBalancer implements ReactorServiceInstanceLoadBalancer {
             List<ServiceInstance> chooseInstances = CollectionUtils.filterList(instances, instance -> StrUtil.isEmpty(EnvUtils.getTag(instance)));
             // 【重要】补充说明：如果希望在 chooseInstances 为空时，不允许打到有 tag 的实例，可以取消注释下面的代码
             if (CollUtil.isEmpty(chooseInstances)) {
-                log.warn("[filterTagServiceInstances][serviceId({}) 没有不带 tag 的服务实例列表，直接使用所有服务实例列表]", serviceId);
+                // 本地开发场景下所有实例都带 tag（HOSTNAME），fallback 到全集属于设计内常态、请求并未失败，降级为 debug 避免噪音
+                log.debug("[filterTagServiceInstances][serviceId({}) 没有不带 tag 的服务实例列表，直接使用所有服务实例列表]", serviceId);
                 chooseInstances = instances;
             }
             return chooseInstances;
@@ -108,7 +109,8 @@ public class GrayLoadBalancer implements ReactorServiceInstanceLoadBalancer {
         // 情况二，有 tag 时，使用 tag 匹配服务实例
         List<ServiceInstance> chooseInstances = CollectionUtils.filterList(instances, instance -> tag.equals(EnvUtils.getTag(instance)));
         if (CollUtil.isEmpty(chooseInstances)) {
-            log.warn("[filterTagServiceInstances][serviceId({}) 没有满足 tag({}) 的服务实例列表，直接使用所有服务实例列表]", serviceId, tag);
+            // 同上：未命中 tag 时 fallback 到全集是设计内正常路径，降级为 debug
+            log.debug("[filterTagServiceInstances][serviceId({}) 没有满足 tag({}) 的服务实例列表，直接使用所有服务实例列表]", serviceId, tag);
             chooseInstances = instances;
         }
         return chooseInstances;
diff --git a/rdms-gateway/src/main/resources/application.yaml b/rdms-gateway/src/main/resources/application.yaml
index 36cb726..99ff434 100644
--- a/rdms-gateway/src/main/resources/application.yaml
+++ b/rdms-gateway/src/main/resources/application.yaml
@@ -30,6 +30,15 @@ spring:
     gateway:
       server:
         webflux:
+          # HttpClient 连接池配置：网关作为反向代理客户端，复用到下游服务的 keep-alive 连接。
+          # 必须保证 max-idle-time < 下游 server.tomcat.keep-alive-timeout（当前下游为 60s），
+          # 否则服务端先 FIN、网关池仍持有"已死连接"，复用时会抛 reactor.netty.http.client.PrematureCloseException。
+          httpclient:
+            connect-timeout: 10000           # 建立连接超时，毫秒
+            response-timeout: 30s            # 接收响应超时
+            pool:
+              max-idle-time: 30s             # 闲置连接最长保留 30s，严格小于下游 keep-alive-timeout(60s)
+              evict-in-background: 60s       # 周期后台驱逐过期连接，进一步降低 race 概率
           # 路由配置项，对应 RouteDefinition 数组
           routes:
             ## system-server 服务
diff --git a/rdms-project/rdms-project-boot/src/main/resources/application.yaml b/rdms-project/rdms-project-boot/src/main/resources/application.yaml
index 1af3ec4..f37b4ea 100644
--- a/rdms-project/rdms-project-boot/src/main/resources/application.yaml
+++ b/rdms-project/rdms-project-boot/src/main/resources/application.yaml
@@ -39,6 +39,11 @@ spring:
 
 server:
   port: 48082
+  tomcat:
+    # 长连接保活时长：默认沿用 connection-timeout(20s)，过短会和网关侧 HttpClient 连接池形成 race，
+    # 导致网关复用已被服务端关闭的连接抛 PrematureCloseException。
+    # 必须大于网关 spring.cloud.gateway.server.webflux.httpclient.pool.max-idle-time(30s)。
+    keep-alive-timeout: 60s
 
 logging:
   file:
diff --git a/rdms-system/rdms-system-boot/src/main/resources/application.yaml b/rdms-system/rdms-system-boot/src/main/resources/application.yaml
index fcf2de5..8a4d86d 100644
--- a/rdms-system/rdms-system-boot/src/main/resources/application.yaml
+++ b/rdms-system/rdms-system-boot/src/main/resources/application.yaml
@@ -39,6 +39,11 @@
 
 server:
   port: 48081
+  tomcat:
+    # 长连接保活时长：默认沿用 connection-timeout(20s)，过短会和网关侧 HttpClient 连接池形成 race，
+    # 导致网关复用已被服务端关闭的连接抛 PrematureCloseException。
+    # 必须大于网关 spring.cloud.gateway.server.webflux.httpclient.pool.max-idle-time(30s)。
+    keep-alive-timeout: 60s
 logging:
   file:
     name: ${user.home}/logs/${spring.application.name}.log # 日志文件名，全路径