问题一：spring cloud gateway sentinel 持久化规则到nacos 启动报错 Err
spring cloud gateway sentinel 持久化规则到nacos 启动报错 环境： nacos:1.3.0,sentinel:1.7.2 springboot 2.3.3 spring cloud Hoxton.SR5 cloud-alibaba:2.2.2.RELEASEJDK1.8 整合spring-cloud-starter-alibaba-sentinel，sentinel-datasource-nacos 启动报错： org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ds-sentinel-nacos-datasource': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
bootstrap.yml: spring sentinel: transport: dashboard: 10.254.246.36:8080 eager: true datasource: ds: nacos: server-addr: 10.254.246.34:8848 group-id: DEFAULT_GROUP data-id: spring.application.name−{spring.application.name}-{spring.profiles.active}-sentinel rule-type: flow
原提问者GitHub用户haoboy78
参考回答：
我以前也有和你一样的问题。您需要设置ds.nacos.username和ds.nacos.密码。 像这样：
datasource: ds: nacos: server-addr: xxx username: nacos password: nacos
错误堆栈
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ds1-sentinel-nacos-datasource': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:178) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1821) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1266) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.registerBean(SentinelDataSourceHandler.java:203) ~[spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.lambdaafterSingletonsInstantiatedafterSingletonsInstantiated0(SentinelDataSourceHandler.java:93) ~[spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE] at java.util.TreeMap.forEach(TreeMap.java:1005) [?:1.8.0_191] at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.afterSingletonsInstantiated(SentinelDataSourceHandler.java:80) [spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:912) [spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE] at com.che300.gamma.Application.main(Application.java:25) [classes/:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_191] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_191] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_191] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_191] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.7.RELEASE.jar:2.2.7.RELEASE] Caused by: java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:460) ~[?:1.8.0_191] at java.util.Properties.setProperty(Properties.java:166) ~[?:1.8.0_191] at com.alibaba.cloud.sentinel.datasource.factorybean.NacosDataSourceFactoryBean.getObject(NacosDataSourceFactoryBean.java:70) ~[spring-cloud-alibaba-sentinel-datasource-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.alibaba.cloud.sentinel.datasource.factorybean.NacosDataSourceFactoryBean.getObject(NacosDataSourceFactoryBean.java:34) ~[spring-cloud-alibaba-sentinel-datasource-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE] ... 24 more
原回答者GitHub用户boailiu
关于本问题的更多回答可点击原文查看：
https://developer.aliyun.com/ask/512267?spm=a2c6h.13066369.question.23.3a844238BVN9Nb
问题二：用nacos-server-2.2.3做集群部署（内置数据源）时启动报错，哪位大佬给分析分析。
2023-07-16 19:23:01,892 ERROR Startup errors :
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'memoryMonitor' defined in URL [jar:file:/app/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-config-2.2.3.jar!/com/alibaba/nacos/config/server/monitor/MemoryMonitor.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'asyncNotifyService': Unsatisfied dependency expressed through field 'dumpService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'embeddedDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
errCode: 500, errMsg: java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBeandoGetBean0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:423)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306)
at com.alibaba.nacos.Nacos.main(Nacos.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:467)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'asyncNotifyService': Unsatisfied dependency expressed through field 'dumpService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'embeddedDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
errCode: 500, errMsg: java.lang.NullPointerException
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBeandoGetBean0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)
... 27 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'embeddedDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
errCode: 500, errMsg: java.lang.NullPointerException
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:160)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:440)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBeandoGetBean0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657)
... 42 common frames omitted
Caused by: com.alibaba.nacos.api.exception.NacosException: Nacos Server did not start because dumpservice bean construction failure :
errCode: 500, errMsg: java.lang.NullPointerException
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:260)
at com.alibaba.nacos.config.server.service.dump.EmbeddedDumpService1.lambda1.lambdaupdate$0(EmbeddedDumpService.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
Caused by: com.alibaba.nacos.api.exception.runtime.NacosRuntimeException: errCode: 500, errMsg: java.lang.NullPointerException
at com.alibaba.nacos.config.server.service.repository.embedded.DistributedDatabaseOperateImpl.queryOne(DistributedDatabaseOperateImpl.java:237)
at com.alibaba.nacos.config.server.service.repository.embedded.EmbeddedConfigInfoPersistServiceImpl.findConfigMaxId(EmbeddedConfigInfoPersistServiceImpl.java:627)
at com.alibaba.nacos.config.server.service.dump.processor.DumpAllProcessor.process(DumpAllProcessor.java:51)
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpConfigInfo(DumpService.java:317)
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:230)
... 8 common frames omitted
2023-07-16 19:23:02,033 WARN [WatchFileCenter] start close
哪位大佬给分析分析。
参考回答：
可能有以下几种原因：
1. 配置文件不正确：请检查您的配置文件是否正确配置，并确保所有必要的配置项都已设置。特别是，请检查 nacos.properties 文件中的属性是否正确设置，例如数据源、数据库连接等信息。
1. 数据源问题：如果您使用的是内置数据源，请确保数据源的配置是否正确，并且数据库连接信息是否正确。您可以通过检查 nacos.properties 文件中的属性来确定数据源的配置是否正确。
1. 网络问题：请检查集群中的所有节点是否能够相互通信。您可以使用 ping 命令或其他网络工具来测试节点之间的连接。
1. 权限问题：请确保您具有启动 Nacos 服务所需的权限。您可以检查 nacos.properties 文件中的属性，以确定是否正确设置了用户名和密码。
1. 资源问题：请确保集群中的所有节点都有足够的资源（例如内存、CPU 等）来运行 Nacos 服务。
关于本问题的更多回答可点击原文查看：
https://developer.aliyun.com/ask/532280?spm=a2c6h.13066369.question.24.3a844238PzmvLl
问题三：Nacos这个报错怎么处理？
Nacos这个报错怎么处理？com.alibaba.nacos.api.exception.NacosException:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Tue Jun 06 16:56:25 CST 2023
There was an unexpected error (type=Bad Request, status=400).
receive invalid redirect request from peer 172.16.28.18
message:request: /nacos/v1/ns/instance/beat failed, servers: [nacos-headless.nacos:8848], code: 500, msg: server is DOWNnow, detailed error message: Optional[Distro protocol is not initialized]
参考回答：
这个错误信息看起来是Nacos服务端出现了问题，可能是由于Nacos节点挂了导致的。
建议检查一下Nacos服务端的日志，看看是否有更详细的错误信息。
同时，还可以尝试重启Nacos服务端，看看是否能够解决这个问题。
关于本问题的更多回答可点击原文查看：
https://developer.aliyun.com/ask/520832?spm=a2c6h.13066369.question.23.3a844238PQaLRm
问题四：confd启动时连接nacos报错
执行以下命令时报错：
报错日志：
看起来像是没输入账户密码的问题，但是我没找到相关文档说明，这个参数该怎么传！尝试了各种写法都不行，有大佬帮忙解答一下吗，非常感谢！
关于本问题的更多回答可点击原文查看：
https://developer.aliyun.com/ask/435137?spm=a2c6h.13066369.question.24.3a844238qSo7qW
问题五：nacos运行一段时间会报错是什么原因？
nacos运行一段时间会报错是什么原因？
2023-07-05 17:13:09,971 WARN HikariPool-1 - Connection com.mysql.cj.jdbc.ConnectionImpl@2d7c889c marked as broken because of SQLSTATE(null), ErrorCode(0)
com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request
参考答案：
nacos，你去配置Spring.data 源
2023-07-05 17:13:09,971 WARN HikariPool-1 - Connection com.mysql.cj.jdbc.ConnectionImpl@2d7c889c marked as broken because of SQLSTATE(null), ErrorCode(0)
com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request
你再仔细看看
关于本问题的更多回答可点击原文查看：
https://developer.aliyun.com/ask/529353?spm=a2c6h.13066369.question.25.3a844238hlUivg
