Error starting applicationcontext spring boot

The title message roughly means that something went wrong when you started the Spring Boot application. Very often the cause can be diagnosed in a few minuets by analyzing the application log. In the following article we will discuss some of the most common causes of errors when starting the Spring context.

1. Potential causes of the problem

The rest of the article is divided into two main groups of problems that can cause problems with starting the application resulting in the title problem. The first is the problem with errors in the code or the lack of appropriate libraries. The second group of problems includes those related to the auto-configuration of the Spring-based application, i.e. the environmental issues in which the application was launched. If you already know the difference, then you can immediately go to the point Why sometimes it’s worth to display Spring Auto-Configuration Report?

1.1. Errors comes directly from the application code

At the beginning , let’s take a look at the structure of a typical application log, which for some reason cannot start. Please note that on lines 14-15 you can find the title message:

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.

Application startup failed

The listing below contains full application log. You can skip it and go directly to its analysis.

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.8.RELEASE)

2019-09-15 04:17:11.225  INFO 18004 --- [           main] com.bettercoding.lab.MyApp               : Starting MyApp on DESKTOP with PID 18004 (D:Workspacedate1927outproductionclasses started by LCiesla in D:Workspacedate1927)
2019-09-15 04:17:11.229  INFO 18004 --- [           main] com.bettercoding.lab.MyApp               : No active profile set, falling back to default profiles: default
2019-09-15 04:17:11.683  WARN 18004 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myApp': Unsatisfied dependency expressed through field 'myCustomBean'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myCustomBean' defined in file [D:Workspacedate1927outproductionclassescombettercodinglabMyCustomBean.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.bettercoding.lab.MyCustomBean]: Constructor threw exception; nested exception is java.lang.RuntimeException: Enforced Exception
2019-09-15 04:17:11.692  INFO 18004 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-09-15 04:17:11.697 ERROR 18004 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myApp': Unsatisfied dependency expressed through field 'myCustomBean'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myCustomBean' defined in file [D:Workspacedate1927outproductionclassescombettercodinglabMyCustomBean.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.bettercoding.lab.MyCustomBean]: Constructor threw exception; nested exception is java.lang.RuntimeException: Enforced Exception
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at com.bettercoding.lab.MyApp.main(MyApp.java:17) ~[classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myCustomBean' defined in file [D:Workspacedate1927outproductionclassescombettercodinglabMyCustomBean.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.bettercoding.lab.MyCustomBean]: Constructor threw exception; nested exception is java.lang.RuntimeException: Enforced Exception
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1303) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	... 18 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.bettercoding.lab.MyCustomBean]: Constructor threw exception; nested exception is java.lang.RuntimeException: Enforced Exception
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:184) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1295) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	... 29 common frames omitted
Caused by: java.lang.RuntimeException: Enforced Exception
	at com.bettercoding.lab.MyCustomBean.<init>(MyCustomBean.java:8) ~[classes/:na]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[na:na]
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:172) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	... 31 common frames omitted


Process finished with exit code 1

1.1.2. Analysis of the application log

Let’s try to analyze the above log by reading it from the top. At the beginning we see the Spring banner, then we pass by information about the conditions under which the application has been launched, in order to get the answer to the question what actually happened in the 11 line. Namely, this line says that during the start of the application, one of the beans (named myCustomBean) was not found, because during its creation (in the constructor) an exception with the message “Enforced Exception” occurred.

We could stop analysing the log there. However, sometimes there are more complicated problems with starting the application. In this case, if reading the log from top to bottom does not bring you the answer, then it is worth reading it a second time. This time from the bottom, because usually the direct cause is right there. Let’s see this in our example.

Starting with line 54, which says “When creating a new bean,” then going through line 37, which says, “An exception occurred while creating the bean” because of a RuntimeException with the message “Enforced Exception”.

1.2. Why sometimes it’s worth to display Spring Auto-Configuration Report?

However, sometimes the cause of the problem with starting the application does not directly come from wrong application code, e.g. the cause may be conditions of the runtime environment. Let’s see the following application code. However, before we run it, please pay attention to lines 32-37. I have defined the MyCustomBean component marked with the annotation @ConditionalOnProperty, which means that the bean will be added to the Spring context only if the my-property is defined.

package com.bettercoding.lab;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Conditional;
import org.springframework.stereotype.Component;

@SpringBootApplication
public class MyApp {

    @Autowired
    private MyCustomBean myCustomBean;

    public static void main(String[] args) {
        SpringApplication.run(MyApp.class, args);
    }
    @Bean
    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
        return new CommandLineRunner() {
            @Override
            public void run(String... args) throws Exception {
                System.out.println("Hello World");
            }
        };
    }

    @Component
    @ConditionalOnProperty("my-property")
    public static class MyCustomBean {
        public MyCustomBean() {
        }
    }
}

When starting the application, we receive a message saying that there is a missing bean in the configuration – line 31.

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.8.RELEASE)

2019-09-16 07:18:50.500  INFO 10496 --- [           main] com.bettercoding.lab.MyApp               : Starting MyApp on DESKTOP-97OFJ5Q with PID 10496 (D:Workspacedate1927outproductionclasses started by LCiesla in D:Workspacedate1927)
2019-09-16 07:18:50.503  INFO 10496 --- [           main] com.bettercoding.lab.MyApp               : No active profile set, falling back to default profiles: default
2019-09-16 07:18:50.941  WARN 10496 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myApp': Unsatisfied dependency expressed through field 'myCustomBean'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2019-09-16 07:18:50.948  INFO 10496 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-09-16 07:18:51.111 ERROR 10496 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field myCustomBean in com.bettercoding.lab.MyApp required a bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' that could not be found.

The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' in your configuration.


Process finished with exit code 1

As you can see in this case, there is no additional information about the reason why this bean was not added to the Spring context. It seems to be defined correctly. At this point, the auto-configuration report comes in handy. To enable it, add -Ddebug=true to the application launch line.

After run the application in the log we will get a report. It quite easy to find out what is the cause of the problem with our application. All you need to do is just to search the report for MyCustomBean term. Our answer is on line 46 of the logo below, i.e. no bean was registered because the property named my-property was not found. To add missing property you can for example add -Dmy-property to the command line.

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.8.RELEASE)

2019-09-16 07:29:51.365  INFO 11712 --- [           main] com.bettercoding.lab.MyApp               : Starting MyApp on DESKTOP-97OFJ5Q with PID 11712 (D:Workspacedate1927outproductionclasses started by LCiesla in D:Workspacedate1927)
2019-09-16 07:29:51.366  INFO 11712 --- [           main] com.bettercoding.lab.MyApp               : No active profile set, falling back to default profiles: default
2019-09-16 07:29:51.366 DEBUG 11712 --- [           main] o.s.boot.SpringApplication               : Loading source class com.bettercoding.lab.MyApp
2019-09-16 07:29:51.886  WARN 11712 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myApp': Unsatisfied dependency expressed through field 'myCustomBean'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2019-09-16 07:29:51.890 DEBUG 11712 --- [           main] .c.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: unknown
2019-09-16 07:29:51.926 DEBUG 11712 --- [           main] ConditionEvaluationReportLoggingListener : 


============================
CONDITIONS EVALUATION REPORT
============================


Positive matches:
-----------------

   GenericCacheConfiguration matched:
      - Cache org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration automatic cache type (CacheCondition)

   JmxAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.jmx.export.MBeanExporter' (OnClassCondition)
      - @ConditionalOnProperty (spring.jmx.enabled=true) matched (OnPropertyCondition)

   ...


Negative matches:
-----------------

   ActiveMQAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.jms.ConnectionFactory' (OnClassCondition)

  ...

   MyApp.MyCustomBean:
      Did not match:
         - @ConditionalOnProperty (my-property) did not find property 'my-property' (OnPropertyCondition)

   


Exclusions:
-----------

    None


Unconditional classes:
----------------------

    org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration

    org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration

    org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration



2019-09-16 07:29:52.148 DEBUG 11712 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : Application failed to start due to an exception

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1658) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1217) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at com.bettercoding.lab.MyApp.main(MyApp.java:20) ~[classes/:na]

2019-09-16 07:29:52.149 ERROR 11712 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field myCustomBean in com.bettercoding.lab.MyApp required a bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' that could not be found.

The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.bettercoding.lab.MyApp$MyCustomBean' in your configuration.


Process finished with exit code 1