SpringBoot 集成 admin，启动时报错，详细日志如下:
2022-05-05 16:42:03.039 WARN 12020 --- [ main] ion$DefaultTemplateResolverConfiguration : Cannot find template location: classpath:/templates/ (please add some templates or check your Thymeleaf configuration)
2022-05-05 16:42:03.395 WARN 12020 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'cookieStoreCleanupTrigger' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerInstanceWebClientConfiguration$CookieStoreConfiguration.class]: Unsatisfied dependency expressed through method 'cookieStoreCleanupTrigger' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'eventStore' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.codecentric.boot.admin.server.eventstore.InMemoryEventStore]: Factory method 'eventStore' threw exception; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
2022-05-05 16:42:03.407 INFO 12020 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2022-05-05 16:42:03.409 INFO 12020 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-05-05 16:42:03.420 INFO 12020 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-05-05 16:42:03.429 ERROR 12020 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'cookieStoreCleanupTrigger' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerInstanceWebClientConfiguration$CookieStoreConfiguration.class]: Unsatisfied dependency expressed through method 'cookieStoreCleanupTrigger' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'eventStore' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.codecentric.boot.admin.server.eventstore.InMemoryEventStore]: Factory method 'eventStore' threw exception; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:539) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:882) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at com.reach.deepev.DeepevApplication.main(DeepevApplication.java:12) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'eventStore' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.codecentric.boot.admin.server.eventstore.InMemoryEventStore]: Factory method 'eventStore' threw exception; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:484) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1290) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1210) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
... 19 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.codecentric.boot.admin.server.eventstore.InMemoryEventStore]: Factory method 'eventStore' threw exception; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
... 33 common frames omitted
Caused by: java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
at de.codecentric.boot.admin.server.eventstore.InstanceEventPublisher.<init>(InstanceEventPublisher.java:38) ~[spring-boot-admin-server-2.6.5.jar:2.6.5]
at de.codecentric.boot.admin.server.eventstore.ConcurrentMapEventStore.<init>(ConcurrentMapEventStore.java:54) ~[spring-boot-admin-server-2.6.5.jar:2.6.5]
at de.codecentric.boot.admin.server.eventstore.InMemoryEventStore.<init>(InMemoryEventStore.java:38) ~[spring-boot-admin-server-2.6.5.jar:2.6.5]
at de.codecentric.boot.admin.server.eventstore.InMemoryEventStore.<init>(InMemoryEventStore.java:34) ~[spring-boot-admin-server-2.6.5.jar:2.6.5]
at de.codecentric.boot.admin.server.config.AdminServerAutoConfiguration.eventStore(AdminServerAutoConfiguration.java:139) ~[spring-boot-admin-server-2.6.5.jar:2.6.5]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
... 34 common frames omitted
Caused by: java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks$EmitResult
... 44 common frames omitted
Caused by: java.lang.ClassNotFoundException: reactor.core.publisher.Sinks$EmitResult
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_241]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_241]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_241]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_241]
... 44 common frames omitted
与目标 VM 断开连接, 地址为: ''127.0.0.1:50056'，传输: '套接字''
进程已结束，退出代码为 1
分析发现是因为版本错误导致的，我服务的springboot使用的2.2.6的版本，但是springbootadmin使用的是2.6.5版本，依赖版本错误导致问题存在，把spring-boot-admin版本修改为2.2.6即可。