項目使用spring boot cloud2.6版本，接入nacos配置中心，上線後發現一直大量日誌輸出，如下：
2025-08-01 01:27:11.846 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [polling-resp] config changed. dataId=ucenter-service.properties, group=cDTx, tenant=public
2025-08-01 01:27:11.846 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - get changedGroupKeys:[ucenter-service.properties+cDTx+public]
2025-08-01 01:27:11.850 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [data-received] dataId=ucenter-service.properties, group=cDTx, tenant=public, md5=ee461a4366ebe744bb7adaa32d53c41f, content=dash-scope.api.key=sk-aaaaa
xinyue.jump.miniapp.corresponding.default.wor..., type=properties
2025-08-01 01:27:12.046 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [polling-resp] config changed. dataId=ucenter-service.properties, group=cDTx, tenant=public
2025-08-01 01:27:12.046 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - get changedGroupKeys:[ucenter-service.properties+cDTx+public]
2025-08-01 01:27:12.050 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [data-received] dataId=ucenter-service.properties, group=cDTx, tenant=public, md5=ee461a4366ebe744bb7adaa32d53c41f, content=dash-scope.api.key=sk-aaaaa
xinyue.jump.miniapp.corresponding.default.wor..., type=properties
2025-08-01 01:27:12.246 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [polling-resp] config changed. dataId=ucenter-service.properties, group=cDTx, tenant=public
2025-08-01 01:27:12.246 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - get changedGroupKeys:[ucenter-service.properties+cDTx+public]
2025-08-01 01:27:12.250 [34m[INFO ][0;39m [32m[com.alibaba.nacos.client.Worker.longPolling.fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public][0;39m [35m[com.alibaba.nacos.client.config.impl.ClientWorker][0;39m - [fixed-mse-aaa-nacos-ans.mse.aliyuncs.com_8848-public] [data-received] dataId=ucenter-service.properties, group=cDTx, tenant=public, md5=ee461a4366ebe744bb7adaa32d53c41f, content=dash-scope.api.key=sk-aaaaa
xinyue.jump.miniapp.corresponding.default.wor..., type=properties仔細查看後發現，該日誌每秒輸出一次，提示內容為nacos配置文件ucenter-service.properties已修改需更新，但是在此過程中並未修改過配置文件，日誌提示的內容和md5值也和nacos配置文件一致。
通過斷點調試確認，是在使用/nacos/v1/cs/configs/listener nacos api監聽配置文件修改事件時始終返回配置文件已修改，導致spring一直在重複拉取配置文件信息，如下：
進一步確認刪除該配置文件後再次添加，或重啓nacos集羣，該現象依然存在。
為了進一步調試解決問題，依據 https://nacos.io/zh-cn/docs/open-api.html 文檔中對/nacos/v1/cs/configs/listener接口定義，編寫python腳本單獨調試該接口，
import requests
r = requests.post("http://192.168.5.173:8848/nacos/v1/cs/configs/listener",
data="Listening-Configs=cdtx-ucenter-service.properties%02cdtx_dev%02cd6ee446cf802c961464a3d0f2738115%02public%01",
headers={"Content-Type": "application/x-www-form-urlencoded",
"Long-Pulling-Timeout": "30000"})
print(r.content)測試現象如下：
1、不傳Long-Pulling-Timeout Header值，同時namespace值傳public，返回正常
2、傳遞Long-Pulling-Timeout Header值30000，同時namespace值傳public，返回已修改
3、傳遞Long-Pulling-Timeout Header值30000，同時namespace值傳空字符串，正常掛起處於等待狀態
結論：/nacos/v1/cs/configs/listener接口如果namespace為public需要傳遞為空字符串，不能傳public，項目設置了spring.cloud.nacos.config.namespace值為public，在運行過程中使用/nacos/v1/cs/configs/listener監聽配置文件是否修改立即返回已修改，導致後續重複拉取配置文件內容並能成功，導致一直重複執行，因此修改項目配置spring.cloud.nacos.config.namespace值為空字符即可解決。
