Tag Archives: spring boot

[Solved] SpringBoot Startup Error: org.springframework.beans.factory.UnsatisfiedDependencyException Error creating

Full Error:

WARN 7612 — [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘processBusinessController’: Unsatisfied dependency expressed through field ‘userService’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userService’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userMapper’ defined in file [F:code ariacs5g ariacs5g_src ariacs5g-parent ariacs5g-power-parent2 ariacs5g-host-service2 argetclassescom ariacshostmapperUserMapper.class]: Unsatisfied dependency expressed through bean property ‘sqlSessionFactory’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘sqlSessionFactory’ defined in class path resource [com/baomidou/mybatisplus/autoconfigure/MybatisPlusAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method ‘sqlSessionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: org/mybatis/logging/LoggerFactory
2020-12-25 21:55:07.728 INFO 7612 — [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-12-25 21:55:07.737 INFO 7612 — [ main] ConditionEvaluationReportLoggingListener :

Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
2020-12-25 21:55:07.757 ERROR 7612 — [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘processBusinessController’: Unsatisfied dependency expressed through field ‘userService’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userService’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userMapper’ defined in file [F:code ariacs5g ariacs5g_src ariacs5g-parent ariacs5g-power-parent2 ariacs5g-host-service2 argetclassescom ariacshostmapperUserMapper.class]: Unsatisfied dependency expressed through bean property ‘sqlSessionFactory’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘sqlSessionFactory’ defined in class path resource [com/baomidou/mybatisplus/autoconfigure/MybatisPlusAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method ‘sqlSessionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: org/mybatis/logging/LoggerFactory
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessorKaTeX parse error: Undefined control sequence: \[ at position 78: …sor.java:598) ~\̲[̲spring-beans-5.…doGetBeanKaTeX parse error: Undefined control sequence: \[ at position 34: …ory.java:321) ~\̲[̲spring-beans-5.…doGetBeanKaTeX parse error: Undefined control sequence: \[ at position 34: …ory.java:321) ~\̲[̲spring-beans-5.…AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:595) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
… 19 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userMapper’ defined in file [F:code ariacs5g ariacs5g_src ariacs5g-parent ariacs5g-power-parent2 ariacs5g-host-service2 argetclassescom ariacshostmapperUserMapper.class]: Unsatisfied dependency expressed through bean property ‘sqlSessionFactory’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘sqlSessionFactory’ defined in class path resource [com/baomidou/mybatisplus/autoconfigure/MybatisPlusAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method ‘sqlSessionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: org/mybatis/logging/LoggerFactory
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1506) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1386) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:591) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:514) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBeanKaTeX parse error: Undefined control sequence: \[ at position 34: …ory.java:321) ~\̲[̲spring-beans-5.…ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:637) ~[spring-context-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadataKaTeX parse error: Undefined control sequence: \[ at position 53: …ata.java:180) ~\̲[̲spring-beans-5.…doGetBeanKaTeX parse error: Undefined control sequence: \[ at position 34: …ory.java:321) ~\̲[̲spring-beans-5.…E n h a n c e r B y S p r i n g C G L I B EnhancerBySpringCGLIBEnhancerBySpringCGLIB602 d 46 a 8. C G L I B 602d46a8.CGLIB602d46a8.CGLIBsqlSessionFactoryKaTeX parse error: Undefined control sequence: \[ at position 17: …(<generated>) ~\̲[̲mybatis-plus-bo…E n h a n c e r B y S p r i n g C G L I B EnhancerBySpringCGLIBEnhancerBySpringCGLIB602 d 46 a 8 602d46a8602d46a8F a s t C l a s s B y S p r i n g C G L I B FastClassBySpringCGLIBFastClassBySpringCGLIBKaTeX parse error: Undefined control sequence: \[ at position 31: …(<generated>) ~\̲[̲mybatis-plus-bo…BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.18.RELEASE.jar:5.1.18.RELEASE]
at com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration
E n h a n c e r B y S p r i n g C G L I B EnhancerBySpringCGLIB
EnhancerBySpringCGLIB
602d46a8.sqlSessionFactory() ~[mybatis-plus-boot-starter-3.4.1.jar:3.4.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.18.RELEASE.jar:5.1.18.RELEASE]
… 58 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.mybatis.logging.LoggerFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_152]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_152]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_152]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_152]
… 70 common frames omitted

Solution: The introduction of both Mybatis and Mybatis-plus into the dependency will cause a conflict, either one. In addition to noticing if there is a conflict in the pom file of this module, we also need to see if the parent module of this module has already introduced the mybaits dependency and you later introduce the Mybatis-plus module in this module, causing a conflict. This scenario is more insidious and not easy to detect.

How to Solve SpringBoot MongoDB MongoAutoConfiguration Startup Error

Background

SpringBoot project needs to manually control whether to load MongoDB auto-configuration (i.e.: MongoAutoConfiguration), then startup error

- Bean method 'mongoTemplate' in 'MongoDatabaseFactoryDependentConfiguration' not loaded because @ConditionalOnBean (types: org.springframework.data.mongodb.MongoDatabaseFactory; SearchStrategy: all) did not find any beans of type org.springframework.data.mongodb.MongoDatabaseFactory

code:

@Import(value = {MongoDataAutoConfiguration.class, MongoAutoConfiguration.class})

Solution: Replace @Import content order, load MongoAutoConfiguration first

@Import(value = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})

[Solved] Spring Boot Error: org.springframework.jdbc.datasource.embedded.EmbeddedData

Record the spring boot error solution once,

If spring boot reports an error during Druid integration, and the following errors are reported:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSource': Unsatisfied dependency expressed through field 'basicProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/jdbc/datasource/embedded/EmbeddedDatabaseType
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at org.learn.SpringBootLearnApplication.main(SpringBootLearnApplication.java:23)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/jdbc/datasource/embedded/EmbeddedDatabaseType
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1303)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1247)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
	... 19 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/jdbc/datasource/embedded/EmbeddedDatabaseType
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:184)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1295)
	... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/jdbc/datasource/embedded/EmbeddedDatabaseType
	at org.springframework.boot.jdbc.EmbeddedDatabaseConnection.<clinit>(EmbeddedDatabaseConnection.java:50)
	at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.<init>(DataSourceProperties.java:152)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:172)
	... 32 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 39 common frames omitted

The reason is that the JDBC related jar package is missing,

Solution: import spring-jdbc package

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
</dependency>

[Solved] SpringBoot Integrate ES Error: Elasticsearch health check failed

Recently, when a springboot integrated es project was started, an error was reported after successful startup: Elasticsearch health check failed

There are two method to solve this error:

1. Close the health check of the actor on elasticsearch (I tried this method, and the project cannot be started later, and this method is not recommended):

management:
  health:
    elasticsearch:
      enabled: false

2. Configure according to spring.elasticsearch.rest. uris (the problem is solved after restart):

spring:
  # ES search engine
  data:
    elasticsearch:
      cluster-nodes: 47.103.5.190:9300
      cluster-name: docker-cluster
      repositories:
        enabled: true
  elasticsearch:
    rest:
      uris: ["http://47.103.5.190:9200"]

[Solved] Springboot Project Startup Error: Unable to Identify bootstrap.yml Configuration

Question

The springboot project I built myself reports an error when I start the project, but I can’t find the relevant configuration information. It is clearly configured in bootstrap.yml , and the application.yml I have been using before. Thinking that the priority of application.yml is not as high as that of bootstrap.yml, the bootstrap configuration file is definitely fine. , the result is that the project can’t live or die.

reason
The SpringBoot project will only recognize application.* configuration files, and will not automatically recognize bootstrap.yml.
The bootstrap.yml configuration is only used in the SpringCloud project. If you want to use the bootstrap.yml in the springboot project, then you need to add the bootstrap starter.

Add bootstrap initiator

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>

Since SpringCloud is built on SpringBoot, all SpringCloud projects are identified by both kinds of files, and it is only at this time that there is a priority statement that SpringCloud projects are given priority to read bootstrap configuration in reading application configuration.
SpringCloud applications are run based on the context of bootstrap.

[Solved] Error resolving template [x] template might not exist or might not be accessible by any of the con

1. Recurrence problem

Today, after configuring Shiro + jwt , you can start spring boot normally. However, when calling the auth/login login method, the following error is reported:

2022-08-21 12:35:18.205 [ http-nio-8081-exec-1 ] - [ ERROR ] [ org.thymeleaf.TemplateEngine : 1136 ] - [THYMELEAF][http-nio-8081-exec-1] Exception processing template "auth/login": Error resolving template [auth/login], template might not exist or might not be accessible by any of the configured Template Resolvers
org.thymeleaf.exceptions.TemplateInputException: Error resolving template [auth/login], template might not exist or might not be accessible by any of the configured Template Resolvers
	at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:869)
	at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607)
	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098)
	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072)
	at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:366)
	at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:190)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1396)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1141)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1080)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:114)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:112)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
	at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
	at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
	at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
	at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
	at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:450)
	at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
	at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
	at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
	at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387)
	at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:204)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

Why did this error occur?Let me analyze it step by step.

2. Analyze problems

2.1 check pom dependency

I have configured the following dependencies in the .pom file 

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

This dependency is to configure the thymeleaf template engine, which we can use to design the template mail sent.

The above error message is sent by this dependency. Let’s see what the thymeleaf the template engine is?

2.2 detailed explanation of thymeleaf engine

thymeleaf Template Engine
thymeleaf is a modern server-side Java templating engine for web and standalone environments.
The main goal of thymeleaf is to bring elegant, natural templates to your development workflow – HTML that displays correctly in the browser and works as a static prototype, allowing for enhanced collaboration in development teams.
With modules for the Spring Framework, extensive integration with your favorite tools and the ability to plug in your own features, thymeleaf is ideal for modern HTML5 JVM web development – although it still has a lot of work to do.
thymeleaf has the following features.
thymeleaf runs with or without a network, so it can be opened directly in a browser to view static page effects. It supports HTML prototypes and can add other attributes inside HTML tags to enable data rendering.
thymeleaf has an out-of-the-box feature. thymeleaf is the recommended template engine for Spring boot and is displayed directly in html, so the front and back ends can be well separated.
It has the following references in spring boot.
internationalization : rendering different countries’ languages
common page display : such as unified exception page handling, common page handling

2.2 check YML configuration

I found that there is no configuration information of thymeleaf in application.yml. The problem may occur here. Therefore, the following configuration is performed in application.yml

spring:
  thymeleaf:
    cache: false 
    prefix: classpath:/templates 
    encoding: UTF-8 
    suffix: .html 
    mode: HTML

Configuration Description:

  1. The cache line is to turn off the cache of the page, otherwise we may not see the changes in time after changing the page, the default is true.
  2. prefix is to configure the location of the thymeleaf template.
  3. encoding is to configure the encoding of the thymeleaf document.

In many cases, if thymeleaf dependency is introduced, the problem can be solved by configuring the above information in the YML file. If this cannot solve your problem, you can continue to read my analysis

But after I configured the above information in the application.yml file and spring boot is successfully started, calling the /auth/login method still reported the above error, so where does the problem lie?

3. Solve problems

After repeated breakpoint debugging, I found out where the problem was. Originally, it was in my unified exception handling. My source code is written as follows:

/**
 * @author baoya
 * @datetime 2022/8/10 21:50
 * @desc 
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    @ExceptionHandler(value = AuthenticationException.class)
    public ReturnResult incorrectCredentialsException(HttpServletRequest request, AuthenticationException e) {
        log.error("Incorrect username or password: {}, request interface: {}", e, request.getRequestURI());
        return ReturnResult.error(USER_CREDENTIALS_ERROR);
    }
}

Restart spring boot and call the /auth/login method and test with postman as follows.

/**
 * @author baoya
 * @datetime 2022/8/10 21:50
 * @desc 
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    @ExceptionHandler(value = AuthenticationException.class)
    public ResponseEntity<ReturnResult> incorrectCredentialsException(HttpServletRequest request, AuthenticationException e) {
        log.error("Incorrect username or password: {}, request interface: {}", e, request.getRequestURI());
        return buildResponseEntity(ReturnResult.error(USER_CREDENTIALS_ERROR));
    }

    /**
     * 
     */
    private ResponseEntity<ReturnResult> buildResponseEntity(ReturnResult apiError) {
        return new ResponseEntity<>(apiError, HttpStatus.valueOf(HttpStatus.BAD_REQUEST.value()));
    }
}

Restart the spring boot and call the /auth/login method. Use the postman test, as shown in the following figure:

[Solved] Error creating bean with name ‘mappingJackson2HttpMessageConverter‘ defined in class path resource

1. Recurrence problem

When starting the spring boot project today, the following error occurred:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingJackson2HttpMessageConverter' defined in class path resource [org/springframework/boot/autoconfigure/http/JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration.class]: Unsatisfied dependency expressed through method 'mappingJackson2HttpMessageConverter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonObjectMapper' defined in class path resource [org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration$JacksonObjectMapperConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.fasterxml.jackson.databind.ObjectMapper] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1605)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1562)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1406)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1338)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.resolveStream(DefaultListableBeanFactory.java:2108)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.orderedStream(DefaultListableBeanFactory.java:2102)
	at org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration.messageConverters(HttpMessageConvertersAutoConfiguration.java:70)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	... 45 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonObjectMapper' defined in class path resource [org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration$JacksonObjectMapperConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.fasterxml.jackson.databind.ObjectMapper] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:579)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)
	... 67 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.fasterxml.jackson.databind.ObjectMapper] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481)
	at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:294)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1098)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
	... 77 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/exc/StreamWriteException
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.getDeclaredMethods(Class.java:1975)
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463)
	... 84 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.exc.StreamWriteException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 88 common frames omitted

That is the error: Error creating bean with name 'mappingJackson2HttpMessageConverter' defined in class path resource , but no specific error can be seen from this error message.

Therefore, continue to look down the error log and see that the error is reported, as shown in the following figure:

2. Analyze problems

java.lang.ClassNotFoundException: com.fasterxml.jackson.core.exc.StreamWriteException. There are generally three situations when this error occurs:

1. Incompatible version

The version of spring is incompatible with the version of Jackson.

2. caused by Jackson package conflict.

How to view Maven’s package conflicts?

You can use the shortcut key Ctrl+Shift+Alt+U, or open the pom.xml, right-click and select maven, and then select Show Dependencies.

After entering the dependency package structure, you can use the addition and subtraction icon at the top to zoom in and out

The red line is the conflicting package. You can right-click -> Exclude, exclude conflicting packets

Remove the conflicting packets and return to pom.xml to refresh, the conflicting packages are excluded

3. lack of corresponding dependency

I checked my POM file and found that there was no corresponding dependency.

3. Solve problems

Since there is no corresponding dependency, add the following dependency:

<!-- Add jackson.version in properties, which is easily called by dependncy -->
<properties>
    <java.version>1.8</java.version>
    <jackson.version>2.10.1</jackson.version>
</properties>

<!-- jackson -->
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>${jackson.verson}</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-core</artifactId>
  <version>${jackson.verson}</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>${jackson.verson}</version>
</dependency>

[Solved] nested exception is org.apache.ibatis.builder.BuilderException: Error invoking SqlProvider method

Solve the nested exception is org.apache.ibatis.builder BuilderException: Error invoking SqlProvider method (tk.mybatis.mapper.provider.base.BaseInsertProvider.dynamicSQL)

When Java uses general Mapper in Spring Boot, the following error occurs:

java.lang.NoSuchMethodException: tk.mybatis.mapper.provider.base.BaseSelectProvider.<init>()
	at java.lang.Class.getConstructor0(Class.java:3082) ~[na:1.8.0_181]
	at java.lang.Class.newInstance(Class.java:412) ~[na:1.8.0_181]
	at org.apache.ibatis.builder.annotation.ProviderSqlSource.invokeProviderMethod(ProviderSqlSource.java:165) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.annotation.ProviderSqlSource.createSqlSource(ProviderSqlSource.java:116) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.annotation.ProviderSqlSource.getBoundSql(ProviderSqlSource.java:102) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:292) ~[mybatis-3.4.6.jar:3.4.6]
	at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:83) ~[pagehelper-5.1.2.jar:na]
	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) ~[mybatis-3.4.6.jar:3.4.6]
	at com.sun.proxy.$Proxy137.query(Unknown Source) ~[na:na]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77) ~[mybatis-3.4.6.jar:3.4.6]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) ~[mybatis-spring-1.3.2.jar:1.3.2]
	at com.sun.proxy.$Proxy84.selectOne(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166) ~[mybatis-spring-1.3.2.jar:1.3.2]
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:83) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) ~[mybatis-3.4.6.jar:3.4.6]
	at com.sun.proxy.$Proxy97.selectByPrimaryKey(Unknown Source) ~[na:na]
	at com.user.service.impl.UserServiceImpl.findById(UserServiceImpl.java:197) ~[classes/:na]
	at com.user.controller.UserController.login(UserController.java:41) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.17.jar:9.0.17]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

The possible reason for this error is the package import error of @MapperScan

The correct usage should be import:

import tk.mybatis.spring.annotation.MapperScan;

[Solved] Failed toString() invocation on an object com.alibaba.fastjson.JSONException: write javaBean error

1. Recurrence problem

Today, when starting the spring boot project, the following problems suddenly occurred:

SLF4J: Failed toString() invocation on an object of type [com.superjson.superjsonmanager.config.jwt.JwtProperties$$EnhancerBySpringCGLIB$$3c58badf]
Reported exception:
com.alibaba.fastjson.JSONException: write javaBean error, fastjson version 1.2.70, class org.springframework.beans.factory.support.DefaultListableBeanFactory, fieldName : $$beanFactory, write javaBean error, fastjson version 1.2.70, class com.baomidou.mybatisplus.MybatisConfiguration, fieldName : configuration, write javaBean error, fastjson version 1.2.70, class com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceWrapper, fieldName : dataSource, write javaBean error, fastjson version 1.2.70, class com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl, fieldName : connection, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.ConnectionImpl, fieldName : connectionRaw, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.DatabaseMetaData, fieldName : metaData, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.result.ResultSetImpl, fieldName : catalogs
	at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:539)
	at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149)
	at com.alibaba.fastjson.serializer.JSONSerializer.writeWithFieldName(JSONSerializer.java:333)
	at com.alibaba.fastjson.serializer.ASMSerializer_1_JwtProperties$$EnhancerBySpringCGLIB$$3c58badf.write(Unknown Source)
	at com.alibaba.fastjson.serializer.JSONSerializer.write(JSONSerializer.java:285)
	at com.alibaba.fastjson.JSON.toJSONString(JSON.java:758)
	at com.alibaba.fastjson.JSON.toJSONString(JSON.java:696)
	at com.alibaba.fastjson.JSON.toJSONString(JSON.java:661)
	at com.superjson.superjsonmanager.config.jwt.JwtProperties.toString(JwtProperties.java:73)
	at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:277)
	at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:249)
	at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:211)
	at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:161)
	at ch.qos.logback.classic.spi.LoggingEvent.getFormattedMessage(LoggingEvent.java:293)
	at ch.qos.logback.classic.spi.LoggingEvent.prepareForDeferredProcessing(LoggingEvent.java:206)
	at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:223)
	at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
	at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
	at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
	at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
	at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
	at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
	at ch.qos.logback.classic.Logger.filterAndLog_1(Logger.java:398)
	at ch.qos.logback.classic.Logger.info(Logger.java:583)
	at com.superjson.superjsonmanager.SuperJsonManagerApplication.main(SuperJsonManagerApplication.java:51)
Caused by: com.alibaba.fastjson.JSONException: write javaBean error, fastjson version 1.2.70, class com.baomidou.mybatisplus.MybatisConfiguration, fieldName : configuration, write javaBean error, fastjson version 1.2.70, class com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceWrapper, fieldName : dataSource, write javaBean error, fastjson version 1.2.70, class com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl, fieldName : connection, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.ConnectionImpl, fieldName : connectionRaw, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.DatabaseMetaData, fieldName : metaData, write javaBean error, fastjson version 1.2.70, class com.mysql.cj.jdbc.result.ResultSetImpl, fieldName : catalogs
	at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:539)
	at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149)
	at com.alibaba.fastjson.serializer.JSONSerializer.writeWithFieldName(JSONSerializer.java:333)
	at com.alibaba.fastjson.serializer.ASMSerializer_105_DefaultSqlSessionFactory.write(Unknown Source)
	at com.alibaba.fastjson.serializer.MapSerializer.write(MapSerializer.java:271)
	at com.alibaba.fastjson.serializer.MapSerializer.write(MapSerializer.java:44)
	at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:320)
	at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470)
	... 24 more

 

2. Analyze problems

I use alibaba.fastjson  to parses the jwtproperties object and reports the above error. This object is used to store the parameters of JWT, as shown in the following code:

/**
 * @author zby
 * @datetime 2022/8/19 12:05
 * @desc jwt entity class, get the configured properties from the yml configuration file
 */
@Getter
@Setter
@Configuration
@ConfigurationProperties(prefix = "jwt")
public class JwtProperties {

    @Value("${jwt.secret}")
    private String appSecret;

    @Value("${jwt.expiration}")
    private long expiration;

    @Value("${jwt.typ}")
    private String typ;

    @Value("${jwt.alg}")
    private String alg;

    @Value("${jwt.subject}")
    private String subject;

    @Value("${jwt.tokenStartWith}")
    private String tokenStartWith;

    @Value("${jwt.tokenHeader}")
    private String tokenHeader;

    public String getTokenStartWith() {
        return tokenStartWith + " ";
    }

    @Override
    @JSONField(serialize = false)
    public String toString() {
        return JSONObject.toJSONString(this);
    }
}

That is, rewrite the tostring() method internal statement JSONObject.toJSONString(this); has a problem, so the breakpoint is to see why this problem occurs, as shown in the screenshot below:

You will find that the dynamically generated the object of jwtproperties does not only have its property value, but also has many more property values that I have not defined. Why does this happen?

It should be that spring boot uses the dynamic proxy mode to instantiate the object, and this additional attribute value is the attribute value of the dynamic proxy object. Therefore, fastjson cannot resolve the attribute value of the dynamic proxy, so an error is reported.

3. Solve problems

Since we know that the error is caused by the spring boot dynamic agent, we do not give the object to the spring boot dynamic agent. We can modify the toString() method as follows:

@Override
@JSONField(serialize = false)
public String toString() {
  JSONObject jsonObject = new JSONObject();
  jsonObject.put("appSecret", this.appSecret);
  jsonObject.put("expiration", this.expiration);
  jsonObject.put("typ", this.typ);
  jsonObject.put("alg", this.alg);
  jsonObject.put("subject", this.subject);
  jsonObject.put("tokenStartWith", this.tokenStartWith);
  jsonObject.put("tokenHeader", this.tokenHeader);
  return JSONObject.toJSONString(jsonObject);
}

Start spring boot as shown in the following figure:

[Solved] Error creating bean with name ‘configurationPropertiesBeans‘ defined in class path resource… 


2022-08-19 16:56:44.390 ERROR 10320 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212) ~[spring-cloud-context-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117) ~[spring-cloud-context-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74) ~[spring-cloud-context-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66) ~[spring-boot-2.7.0.jar:2.7.0]
	at java.util.ArrayList.forEach(ArrayList.java:1249) ~[na:1.8.0_131]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:344) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.0.jar:2.7.0]
	at com.beimao.h5App.main(h5App.java:22) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485) ~[spring-core-5.3.20.jar:5.3.20]
	at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305) ~[spring-context-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116) ~[spring-beans-5.3.20.jar:5.3.20]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.3.20.jar:5.3.20]
	... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_131]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_131]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_131]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467) ~[spring-core-5.3.20.jar:5.3.20]
	... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_131]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_131]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_131]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_131]
	... 41 common frames omitted


Process finished with exit code 1

Conclusion: spring-boot and cloud versions are incompatible. Boot-2.2.7, cloud-Hoxton.SR3

Processing: change the spring boot version to

2.2.5.RELEASE

Problem-solving

[Solved] Error creating bean with name ‘redisConnectionFactory‘ defined in class path resource…

1. Recurrence problem

When starting the spring boot project today, the following error occurred:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisConnectionFactory' defined in class path resource [org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory]: Factory method 'redisConnectionFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(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:944)
	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:758)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:337)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1336)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1325)
	at com.superjson.superjsonmanager.SuperJsonManagerApplication.main(SuperJsonManagerApplication.java:51)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory]: Factory method 'redisConnectionFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
	... 19 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
	at org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration$LettucePoolingClientConfigurationBuilder.<init>(LettucePoolingClientConfiguration.java:94)
	at org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration.builder(LettucePoolingClientConfiguration.java:51)
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory.createBuilder(LettuceConnectionConfiguration.java:172)
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.createBuilder(LettuceConnectionConfiguration.java:110)
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.getLettuceClientConfiguration(LettuceConnectionConfiguration.java:95)
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.redisConnectionFactory(LettuceConnectionConfiguration.java:77)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 31 common frames omitted

Disconnected from the target VM, address: '127.0.0.1:62013', transport: 'socket'

Process finished with exit code 1

It is error creating bean with name 'redisconnectionfactory' defined in class path resource problem, that is, the redis connection pool cannot be created.

2. Analyze problems

Is there a problem with my redis configuration, or is the redis dependency package not introduced, resulting in the above error?Therefore, the following analysis is made.

1. View redis configuration

spring:
  # Need to set it to always, color print log
  output:
    ansi:
      enabled: always
  redis:
    database: 0
    host: 127.0.0.1
    lettuce:
      pool:
        max-active: 8
        max-idle: 10
        max-wait: 1ms
        min-idle: 5
      shutdown-timeout: 100ms
    port: 6379

There is no problem with the configuration.

2. View redis dependencies

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

Still no problem.

3. Continue to analyze the error log and see that the error is reported, as shown in the following figure:

That is, java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig, the GenericObjectPoolConfig class cannot be found because the dependency of this class is not configured.

3. Solution

Since there are no dependencies related to redis, the following dependencies can be introduced:

<!-- properties add redisCommonsPool.version，so that you can call dependncy easily-->
<properties>
    <java.version>1.8</java.version>
  <redisCommonsPool.version>2.11.1</redisCommonsPool.version>
</properties>

<!-- Introducing the redis connection pool dependency -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
    <version>${redisCommonsPool.version}</version>
</dependency>

Why do I need this dependency? Because I have configured the connection pool of redis in the yml file, and the connection pool needs to use this dependency.