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I/O error on POST request for Connect timed out; nested exception is java.net.SocketTimeoutException: Connect timed out

I/O error on POST request for "http://localhost:9411/api/v2/spans": Connect timed out; nested exception is java.net.SocketTimeoutException: Connect timed out
2021-11-24 10:17:30.642 INFO [,,,] 7872 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.2.RELEASE)
2021-11-24 10:17:31.942 INFO [service,,,] 7872 --- [ restartedMain] ServiceApplication : No active profile set, falling back to default profiles: default
2021-11-24 10:17:35.956 INFO [service,,,] 7872 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2021-11-24 10:17:36.883 INFO [service,,,] 7872 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 901ms. Found 27 JPA repository interfaces.
2021-11-24 10:17:38.737 INFO [service,,,] 7872 --- [ restartedMain] o.s.cloud.context.scope.GenericScope : BeanFactory id=f090e4ad-27c8-34fa-89ba-eeeccacd1fd9
2021-11-24 10:17:42.104 INFO [service,,,] 7872 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 9194 (http)
2021-11-24 10:17:42.149 INFO [service,,,] 7872 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-11-24 10:17:42.150 INFO [service,,,] 7872 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2021-11-24 10:17:42.661 INFO [service,,,] 7872 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-11-24 10:17:42.662 INFO [service,,,] 7872 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 10646 ms
2021-11-24 10:17:43.074 INFO [service,,,] 7872 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-11-24 10:17:43.494 INFO [service,,,] 7872 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-11-24 10:17:43.517 INFO [service,,,] 7872 --- [ restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:postgresql://localhost:5432/codeis'
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/C:/Users/Hp/.m2/repository/org/springframework/spring-core/5.2.8.RELEASE/spring-core-5.2.8.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2021-11-24 10:17:46.238 WARN [school-erp-service,,,] 7872 --- [ restartedMain] o.s.c.s.zipkin2.ZipkinAutoConfiguration : Check result of the [org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender#41a2805a] contains an error [CheckResult{ok=false, error=org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:9411/api/v2/spans": Connect timed out; nested exception is java.net.SocketTimeoutException: Connect timed out}]
What mistake I make?
I am not using the Zipkin server.
Why throw such type of error how to resolve it?
I am using zuul API gateway.

Check your build dependency tree, there must be an entry for spring-cloud-starter-sleuth. In case you are planning not to use it, then remove it.

The firewall is not turned off
$ systemctl stop firewalld

SpringBoot Maven project is not creating tables in database

I've created a new project with Spring Initializr and I configured connection with SSMS database:
spring.datasource.url=jdbc:sqlserver://xxxxxxxx;databaseName=yyyyyy
spring.datasource.username=
spring.datasource.password=
spring.datasource.driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.jpa.show-sql=true
spring.jpa.hibernate.dialect=org.hibernate.dialect.SQLServer2012Dialect
spring.jpa.hibernate.ddl-auto=update
I also created a test model class to check everything works fine:
#Getter
#Setter
#AllArgsConstructor
#NoArgsConstructor
#EqualsAndHashCode(callSuper = false)
#ToString
#Builder
#Entity
#Table(name = "USR", schema = "dbo")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer usrId;
}
This is my console output:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.1)
2020-12-21 21:15:06.574 INFO 22192 --- [ restartedMain] c.e.employees.EmployeesApplication : Starting EmployeesApplication using Java 11.0.8 on DESKTOP-OEEHFPE with PID 22192 (C:\Alina\employees\target\classes started by olaru in C:\Alina\employees)
2020-12-21 21:15:06.577 INFO 22192 --- [ restartedMain] c.e.employees.EmployeesApplication : The following profiles are active: #spring.profiles.active#
2020-12-21 21:15:06.637 INFO 22192 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-12-21 21:15:07.211 INFO 22192 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-12-21 21:15:07.226 INFO 22192 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 5 ms. Found 0 JPA repository interfaces.
2020-12-21 21:15:07.646 INFO 22192 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-12-21 21:15:07.695 INFO 22192 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.25.Final
2020-12-21 21:15:07.798 INFO 22192 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2020-12-21 21:15:07.902 INFO 22192 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-12-21 21:15:08.200 INFO 22192 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-12-21 21:15:08.220 INFO 22192 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.SQLServer2012Dialect
2020-12-21 21:15:08.710 INFO 22192 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-12-21 21:15:08.721 INFO 22192 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-12-21 21:15:08.761 INFO 22192 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-12-21 21:15:08.873 INFO 22192 --- [ restartedMain] c.e.employees.EmployeesApplication : Started EmployeesApplication in 2.792 seconds (JVM running for 4.218)
2020-12-21 21:15:08.885 INFO 22192 --- [extShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-12-21 21:15:08.892 INFO 22192 --- [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2020-12-21 21:15:08.898 INFO 22192 --- [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
Process finished with exit code 0
I don't see any error in the console, but the table is not created. Please let me know if you have any idea what's wrong.

Did you add the required dependencies?
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
</dependency>
You also need to enable entity scan, in case you didn't:
#Configuration
#EntityScan(basePackages = {"my.package"})
#EnableJpaRepositories(basePackages = {"my.package"})
Basically your first three properties would be enough, but the others shouldn't harm.
spring.datasource.url=jdbc:sqlserver://localhost;databaseName=my-app
spring.datasource.username=sa
spring.datasource.password=<<YOUR_PASSWORD>>
If you like create a Spring Boot app for MS SQL at https://bootify.io to see the full configuration.

Spring boot application is getting stuck while running

This is my first spring-boot application. I ran a sample code and it is getting stuck at "Initialized JPA EntityManagerFactory for persistence unit 'default' ".
Below is the code
package com.fredo.webservices.homefredoServcies;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class HomeFredoServciesApplication {
public static void main(String[] args) {
SpringApplication.run(HomeFredoServciesApplication.class, args);
}
}
below are the logs
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.0.RELEASE)
2020-06-07 20:58:15.807 INFO 1496 --- [ restartedMain] c.f.w.h.HomeFredoServciesApplication : Starting HomeFredoServciesApplication on ANGU with PID 1496 (C:\Users\ASUS\Desktop\java ms\home-fredoServcies\target\classes started by Angu in C:\Users\ASUS\Desktop\java ms\home-fredoServcies)
2020-06-07 20:58:15.811 INFO 1496 --- [ restartedMain] c.f.w.h.HomeFredoServciesApplication : No active profile set, falling back to default profiles: default
2020-06-07 20:58:15.881 INFO 1496 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-06-07 20:58:15.882 INFO 1496 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-06-07 20:58:16.799 INFO 1496 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-06-07 20:58:16.822 INFO 1496 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 13ms. Found 0 JPA repository interfaces.
2020-06-07 20:58:17.861 INFO 1496 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-06-07 20:58:17.876 INFO 1496 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-06-07 20:58:17.877 INFO 1496 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.35]
2020-06-07 20:58:18.038 INFO 1496 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-06-07 20:58:18.038 INFO 1496 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2156 ms
2020-06-07 20:58:18.100 INFO 1496 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-06-07 20:58:18.335 INFO 1496 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-06-07 20:58:18.342 INFO 1496 --- [ restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:b2c0eff5-9805-4a71-9f66-c6c863d910f5'
2020-06-07 20:58:18.548 INFO 1496 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-06-07 20:58:18.629 INFO 1496 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-06-07 20:58:18.674 WARN 1496 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-06-07 20:58:18.720 INFO 1496 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.15.Final
2020-06-07 20:58:18.966 INFO 1496 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-06-07 20:58:19.203 INFO 1496 --- [ task-1] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2020-06-07 20:58:19.210 INFO 1496 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-06-07 20:58:19.317 INFO 1496 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-06-07 20:58:19.322 INFO 1496 --- [ restartedMain] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-06-07 20:58:19.324 INFO 1496 --- [ restartedMain] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-06-07 20:58:19.344 INFO 1496 --- [ restartedMain] c.f.w.h.HomeFredoServciesApplication : Started HomeFredoServciesApplication in 3.985 seconds (JVM running for 4.795)
2020-06-07 20:58:19.554 INFO 1496 --- [ task-1] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-06-07 20:58:19.562 INFO 1496 --- [ task-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'

I had same problem with application started by Eclipse and Spring Tool Run Configuration in Debug Mode.
A breakpoint was referencing a line on some removed block code, after removing faulty breakpoint, the application start new properly again.
Window-> Show View -> Breakpoints

try to hit http://localhost:8080/h2-console if you get response. your server is up and running. In logs it says H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:b2c0eff5-9805-4a71-9f66-c6c863d910f5'

SpringBoot app takes ages to start in debug mode only

I don't understand why my spring boot app takes 15 seconds to start when I run it in regular mode vs 15 minutes when I run it in debug mode.
Debug mode Logs:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.3.RELEASE)
2020-02-28 16:57:27.214 INFO [my-project,,,] 5740 --- [ restartedMain] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : https://config-server.my-company.org
2020-02-28 16:57:29.442 INFO [my-project,,,] 5740 --- [ restartedMain] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=my-project, profiles=[dev], label=null, version=c656a6ca556f4fc58135e673a7e5c4e97a2e5088, state=null
2020-02-28 16:57:33.537 INFO [my-project,,,] 5740 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-02-28 16:57:33.537 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4023 ms
2020-02-28 16:57:37.986 INFO [my-project,,,] 5740 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-02-28 17:00:22.158 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-02-28 17:02:21.271 WARN [my-project,,,] 5740 --- [ restartedMain] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-02-28 17:03:37.441 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 16 endpoint(s) beneath base path '/actuator'
2020-02-28 17:04:22.272 INFO [my-project,,,] 5740 --- [ restartedMain] pertySourcedRequestMappingHandlerMapping : Mapped URL path [/v2/api-docs] onto method [public org.springframework.http.ResponseEntity<springfox.documentation.spring.web.json.Json> springfox.documentation.swagger2.web.Swagger2Controller.getDocumentation(java.lang.String,javax.servlet.http.HttpServletRequest)]
2020-02-28 17:04:58.404 WARN [my-project,,,] 5740 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources.
2020-02-28 17:04:58.416 INFO [my-project,,,] 5740 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2020-02-28 17:04:58.753 WARN [my-project,,,] 5740 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources.
2020-02-28 17:04:58.765 INFO [my-project,,,] 5740 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2020-02-28 17:05:58.718 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-02-28 17:07:05.596 INFO [my-project,,,] 5740 --- [ restartedMain] o.e.s.filters.AnnotationSizeOfFilter : Using regular expression provided through VM argument org.ehcache.sizeof.filters.AnnotationSizeOfFilter.pattern for IgnoreSizeOf annotation : ^.*cache\..*IgnoreSizeOf$
2020-02-28 17:07:29.728 INFO [my-project,,,] 5740 --- [ restartedMain] c.my-company.security.idp.BeanFactory : override default IdpOAuthManager userInfoCallDisabled = true, IdpUser will only contains uid
2020-02-28 17:08:24.056 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService
2020-02-28 17:09:58.919 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: any request org.springframework.web.filter.CorsFilter#7430bc1e,
2020-02-28 17:12:03.101 INFO [my-project,,,] 5740 --- [ restartedMain] d.s.w.p.DocumentationPluginsBootstrapper : Context refreshed
2020-02-28 17:12:05.749 INFO [my-project,,,] 5740 --- [ restartedMain] d.s.w.p.DocumentationPluginsBootstrapper : Found 1 custom documentation plugin(s) org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter#69e6f894]
2020-02-28 17:12:17.850 INFO [my-project,,,] 5740 --- [ restartedMain] s.d.s.w.s.ApiListingReferenceScanner : Scanning for api listing references
2020-02-28 17:13:54.484 INFO [my-project,,,] 5740 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-02-28 17:13:54.837 INFO [my-project,,,] 5740 --- [ restartedMain] c.d.i.b.p.MySpringBootApplication : Started MySpringBootApplication in 988.725 seconds (JVM running for 989.776)
2020-02-28 17:14:17.835 INFO [my-project,,,] 5740 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 6879 ms
2020-02-28 17:14:35.004 INFO [my-project,b5277242974c5225,b5277242974c5225,false] 5740 --- [nio-8080-exec-1] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : https://config-server.my-company.org
2020-02-28 17:14:42.858 INFO [my-project,b5277242974c5225,b5277242974c5225,false] 5740 --- [nio-8080-exec-1] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=my-project, profiles=[dev], label=null, version=c656a6ca556f4fc58135e673a7e5c4e97a2e5088, state=null
Any help or explanation would be appreciated.
Thanks

You probably have a breakpoint on a method call, those can slow down a Java application by quite a lot, instead if you can try to put your breakpoint on the first line of code in the method.

Breakpoints or conditional breakpoints usually cause this issue. Remove all breakpoints and run it.

Why is Spring Boot loading all xml files when I only specify one?

I have a very basic Spring Boot Application.
There are 2 #SpringBootApplications in the project:
ApplicationA:
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ImportResource;
/**
* Created on 2/16/16.
*/
#SpringBootApplication
#ImportResource("classpath:run-app-a-context.xml")
public class ApplicationA {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(ApplicationA.class, args);
System.out.println(context.getBean("helloA"));
System.out.println(context.getBean("helloB"));
}
}
ApplicationB:
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ImportResource;
/**
* Created on 2/16/16.
*/
#SpringBootApplication
#ImportResource("classpath:run-app-b-context.xml")
public class ApplicationB {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(ApplicationB.class, args);
System.out.println(context.getBean("helloA"));
System.out.println(context.getBean("helloB"));
}
}
As you can see, ApplicationA is only supposed to import run-app-a-context.xml and ApplicationB is only supposed to import run-app-b-context.xml. However, this is not what occurs.
If I run ./gradlew bootRun; I get the following output (emphasis added):
./gradlew bootRun
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:findMainClass
:bootRun
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.3.1.RELEASE)
2016-02-16 11:42:21.889 INFO 47524 --- [ main] com.example.ApplicationA : Starting ApplicationA on LMC with PID 47524 (/Users/IdeaProjects/whyisitloadingeverything/build/classes/main started in /Users/IdeaProjects/whyisitloadingeverything)
2016-02-16 11:42:21.896 INFO 47524 --- [ main] com.example.ApplicationA : No active profile set, falling back to default profiles: default
2016-02-16 11:42:21.975 INFO 47524 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#24a35978: startup date [Tue Feb 16 11:42:21 PST 2016]; root of context hierarchy
2016-02-16 11:42:22.883 INFO 47524 --- [ main] o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [run-app-b-context.xml]
2016-02-16 11:42:23.081 INFO 47524 --- [ main] o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [run-app-a-context.xml]
2016-02-16 11:42:23.255 INFO 47524 --- [ main] o.s.b.f.config.PropertiesFactoryBean : Loading properties file from URL [jar:file:/Users/.gradle/caches/modules-2/files-2.1/org.springframework.integration/spring-integration-core/4.2.4.RELEASE/4780d5c2b680796844916402816135f0e79f166f/spring-integration-core-4.2.4.RELEASE.jar!/META-INF/spring.integration.default.properties]
2016-02-16 11:42:23.258 INFO 47524 --- [ main] o.s.i.config.IntegrationRegistrar : No bean named 'integrationHeaderChannelRegistry' has been explicitly defined. Therefore, a default DefaultHeaderChannelRegistry will be created.
2016-02-16 11:42:23.451 INFO 47524 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'errorChannel' has been explicitly defined. Therefore, a default PublishSubscribeChannel will be created.
2016-02-16 11:42:23.470 INFO 47524 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'taskScheduler' has been explicitly defined. Therefore, a default ThreadPoolTaskScheduler will be created.
2016-02-16 11:42:24.036 INFO 47524 --- [ main] o.s.b.f.config.PropertiesFactoryBean : Loading properties file from URL [jar:file:/Users/.gradle/caches/modules-2/files-2.1/org.springframework.integration/spring-integration-core/4.2.4.RELEASE/4780d5c2b680796844916402816135f0e79f166f/spring-integration-core-4.2.4.RELEASE.jar!/META-INF/spring.integration.default.properties]
2016-02-16 11:42:24.100 INFO 47524 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler'
2016-02-16 11:42:24.226 INFO 47524 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2016-02-16 11:42:24.243 INFO 47524 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2016-02-16 11:42:24.243 INFO 47524 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2016-02-16 11:42:24.244 INFO 47524 --- [ main] o.s.i.channel.PublishSubscribeChannel : Channel 'application.errorChannel' has 1 subscriber(s).
2016-02-16 11:42:24.244 INFO 47524 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started _org.springframework.integration.errorLogger
2016-02-16 11:42:24.256 INFO 47524 --- [ main] com.example.ApplicationA : Started ApplicationA in 2.9 seconds (JVM running for 3.466)
application A
application B
2016-02-16 11:42:24.257 INFO 47524 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext#24a35978: startup date [Tue Feb 16 11:42:21 PST 2016]; root of context hierarchy
2016-02-16 11:42:24.258 INFO 47524 --- [ Thread-1] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2016-02-16 11:42:24.259 INFO 47524 --- [ Thread-1] o.s.i.endpoint.EventDrivenConsumer : Removing {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2016-02-16 11:42:24.259 INFO 47524 --- [ Thread-1] o.s.i.channel.PublishSubscribeChannel : Channel 'application.errorChannel' has 0 subscriber(s).
2016-02-16 11:42:24.259 INFO 47524 --- [ Thread-1] o.s.i.endpoint.EventDrivenConsumer : stopped _org.springframework.integration.errorLogger
2016-02-16 11:42:24.260 INFO 47524 --- [ Thread-1] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'taskScheduler'
2016-02-16 11:42:24.261 INFO 47524 --- [ Thread-1] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
BUILD SUCCESSFUL
Total time: 13.537 secs
I see that both xml context files are being loaded and therefore the beans in both files are added to the Application Context.
Why is Spring/Spring Boot automatically loading all xml configuration files? How do I stop this behavior?

It is because #SpringBootApplication by default includes the #ComponentScan annotation as well as the #Configuration annotation.
The ComponentScan annotation will recursively scan the current package by default if no basePackageClasses() or basePackages() (or its alias value()) is defined. It looks for classes marked with #Configuration, and if it finds one, the beans defined in it will be added to the Application Context.
Since both ApplicationA and ApplicationB are in the same package; when starting ApplicationA, ApplicationB is automatically component-scanned in (and vice-versa when starting ApplicationB).
The fix is to put ApplicationA and ApplicationB in separate packages.