Dba.getCluster: This function is not available through a session to a standalone instance (metadata exists, instance belongs to that metadata, but GR is not active) (MYSQLSH 51314)

这是一个关于 MySQL 数据库的错误信息，可能是在访问集群时出现的。需要检查数据库的配置和连接方式是否正确，以及是否存在 GR（Group Replication）集群。建议您检查相应的文档和日志，以确定具体的问题和解决方法。

相关问题

failed to req API:/nacos/v1/ns/instance after all servers([10.12.5.135:8848]) tried

这个错误提示"failed to req API:/nacos/v1/ns/instance after all servers([10.12.5.135:8848]) tried: ErrCode:503, ErrMsg:server is DOWN now, please try again later!" 意味着在尝试连接到服务器[10.12.5.135:8848]的过程中发生了故障。具体错误代码是503，错误消息是服务器当前不可用，请稍后重试。这个错误通常是由于服务器宕机或无法连接导致的。解决方法是先删除nacos容器，然后使用以下命令启动nacos容器：docker run --name nacos-server -d -p 8848:8848 --privileged=true --restart=always -e MODE=standalone -e PREFER_HOST_MODE=hostname -e JVM_XMS=256m -e JVM_XMX=256m -e SPRING_DATASOURCE_PLATFORM=mysql -e MYSQL_SERVICE_HOST=127.0.0.1 -e MYSQL_SERVICE_PORT=3306 -e MYSQL_SERVICE_DB_NAME=nacos -e MYSQL_SERVICE_USER=root -e MYSQL_SERVICE_PASSWORD=123456 nacos/nacos-server。这将重新启动nacos服务器，并确保它正确运行。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [nacos报错：failed to req API:/nacos/v1/ns/instance after all servers([192.168.43.148:8848])解决方案](https://blog.csdn.net/Maven_Chen/article/details/128468044)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [failed to req API:/nacos/v1/ns/instance after all servers([192.168.43.148:8848]) tried: ErrCode:503,](https://blog.csdn.net/Leo0703668/article/details/126668877)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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ailed to req API:/nacos/v1/ns/instance after all servers([119.91.203.80:8848]) tried

该错误信息表明在所有服务器尝试后，仍无法请求API：/nacos/v1/ns/instance。这可能是由于服务器不可用所导致的错误，具体原因为ErrCode:503，ErrMsg:server is DOWN now, please try again later!。。然后，使用以下命令启动nacos容器：docker run --name nacos-server -d -p 8848:8848 --privileged=true --restart=always -e MODE=standalone -e PREFER_HOST_MODE=hostname -e JVM_XMS=256m -e JVM_XMX=256m -e SPRING_DATASOURCE_PLATFORM=mysql -e MYSQL_SERVICE_HOST=127.0.0.1 -e MYSQL_SERVICE_PORT=3306 -e MYSQL_SERVICE_DB_NAME=nacos -e MYSQL_SERVICE_USER=root -e MYSQL_SERVICE_PASSWORD=123456 nacos/nacos-server。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [nacos报错：failed to req API:/nacos/v1/ns/instance after all servers([192.168.43.148:8848])解决方案](https://blog.csdn.net/Maven_Chen/article/details/128468044)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [failed to req API:/nacos/v1/ns/instance after all servers([192.168.43.148:8848]) tried: ErrCode:503,](https://blog.csdn.net/Leo0703668/article/details/126668877)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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