I am new to Spring Boot and Microservices. I have created RestController and tried to check using RequestMapping test but it give us error as 404, whitelabel error page.
Below is pom.xml :
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.6</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demoweb</groupId>
<artifactId>CitizenDetailService</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>CitizenDetailService</name>
<description>Microservices Project for CitizenServiceDetailService</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.4</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
Below is the code for the controller
package com.exmaple.microservices.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/citizen")
public class CitizenController {
@RequestMapping("/test")
public String test()
{
return "Hello";
}
}
Below is Spring boot main class
package com.example.microservices.CitizenDetailsService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class CitizenDetailServiceApplication {
public static void main(String[] args) {
SpringApplication.run(CitizenDetailServiceApplication.class, args);
}
}
Server Start up logs are mentioned below :
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
[32m :: Spring Boot :: [39m [2m (v2.5.6)[0;39m
[2m2021-11-07 21:51:08.753[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mc.e.m.C.CitizenDetailServiceApplication [0;39m [2m:[0;39m Starting CitizenDetailServiceApplication using Java 16.0.1 on DESKTOP-9G5CUP8 with PID 27720 (D:\Spring\CitizenDetailService\target\classes started by 91909 in D:\Spring\CitizenDetailService)
[2m2021-11-07 21:51:08.755[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mc.e.m.C.CitizenDetailServiceApplication [0;39m [2m:[0;39m No active profile set, falling back to default profiles: default
[2m2021-11-07 21:51:09.257[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Bootstrapping Spring Data JPA repositories in DEFAULT mode.
[2m2021-11-07 21:51:09.266[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Finished Spring Data repository scanning in 3 ms. Found 0 JPA repository interfaces.
[2m2021-11-07 21:51:09.451[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.cloud.context.scope.GenericScope [0;39m [2m:[0;39m BeanFactory id=c60b4e5b-8c67-3295-9bcc-48b6ccda1d6a
[2m2021-11-07 21:51:09.821[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.b.w.embedded.tomcat.TomcatWebServer [0;39m [2m:[0;39m Tomcat initialized with port(s): 8085 (http)
[2m2021-11-07 21:51:09.831[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.apache.catalina.core.StandardService [0;39m [2m:[0;39m Starting service [Tomcat]
[2m2021-11-07 21:51:09.831[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.apache.catalina.core.StandardEngine [0;39m [2m:[0;39m Starting Servlet engine: [Apache Tomcat/9.0.54]
[2m2021-11-07 21:51:09.968[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.a.c.c.C.[Tomcat].[localhost].[/] [0;39m [2m:[0;39m Initializing Spring embedded WebApplicationContext
[2m2021-11-07 21:51:09.968[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mw.s.c.ServletWebServerApplicationContext[0;39m [2m:[0;39m Root WebApplicationContext: initialization completed in 1184 ms
[2m2021-11-07 21:51:10.121[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.jpa.internal.util.LogHelper [0;39m [2m:[0;39m HHH000204: Processing PersistenceUnitInfo [name: default]
[2m2021-11-07 21:51:10.170[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.Version [0;39m [2m:[0;39m HHH000412: Hibernate ORM core version 5.4.32.Final
[2m2021-11-07 21:51:10.327[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.annotations.common.Version [0;39m [2m:[0;39m HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
[2m2021-11-07 21:51:10.414[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-11-07 21:51:10.753[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Start completed.
[2m2021-11-07 21:51:10.775[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.dialect.Dialect [0;39m [2m:[0;39m HHH000400: Using dialect: org.hibernate.dialect.MySQL5InnoDBDialect
[2m2021-11-07 21:51:11.079[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.e.t.j.p.i.JtaPlatformInitiator [0;39m [2m:[0;39m HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
[2m2021-11-07 21:51:11.090[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mj.LocalContainerEntityManagerFactoryBean[0;39m [2m:[0;39m Initialized JPA EntityManagerFactory for persistence unit 'default'
[2m2021-11-07 21:51:11.128[0;39m [33m WARN[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mJpaBaseConfiguration$JpaWebConfiguration[0;39m [2m:[0;39m 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
[2m2021-11-07 21:51:11.619[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mDiscoveryClientOptionalArgsConfiguration[0;39m [2m:[0;39m Eureka HTTP Client uses RestTemplate.
[2m2021-11-07 21:51:11.802[0;39m [33m WARN[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36miguration$LoadBalancerCaffeineWarnLogger[0;39m [2m:[0;39m Spring Cloud LoadBalancer is currently working with the default cache. You can switch to using Caffeine cache, by adding it and org.springframework.cache.caffeine.CaffeineCacheManager to the classpath.
[2m2021-11-07 21:51:11.879[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.c.n.eureka.InstanceInfoFactory [0;39m [2m:[0;39m Setting initial instance status as: STARTING
[2m2021-11-07 21:51:11.941[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Initializing Eureka in region us-east-1
[2m2021-11-07 21:51:11.946[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mc.n.d.s.r.aws.ConfigClusterResolver [0;39m [2m:[0;39m Resolving eureka endpoints via configuration
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Disable delta property : false
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Single vip registry refresh property : null
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Force full registry fetch : false
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Application is null : false
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Registered Applications size is zero : true
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Application version is -1: true
[2m2021-11-07 21:51:11.980[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Getting all instance registry info from the eureka server
[2m2021-11-07 21:51:12.272[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m The response status is 200
[2m2021-11-07 21:51:12.279[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Starting heartbeat executor: renew interval is: 30
[2m2021-11-07 21:51:12.287[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mc.n.discovery.InstanceInfoReplicator [0;39m [2m:[0;39m InstanceInfoReplicator onDemand update allowed rate per min is 4
[2m2021-11-07 21:51:12.303[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Discovery Client initialized at timestamp 1636302072301 with initial instances count: 0
[2m2021-11-07 21:51:12.305[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.c.n.e.s.EurekaServiceRegistry [0;39m [2m:[0;39m Registering application UNKNOWN with eureka with status UP
[2m2021-11-07 21:51:12.306[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Saw local status change event StatusChangeEvent [timestamp=1636302072306, current=UP, previous=STARTING]
[2m2021-11-07 21:51:12.308[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[nfoReplicator-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m DiscoveryClient_UNKNOWN/DESKTOP-9G5CUP8:8085: registering service...
[2m2021-11-07 21:51:12.330[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.b.w.embedded.tomcat.TomcatWebServer [0;39m [2m:[0;39m Tomcat started on port(s): 8085 (http) with context path ''
[2m2021-11-07 21:51:12.330[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.c.n.e.s.EurekaAutoServiceRegistration[0;39m [2m:[0;39m Updating port to 8085
[2m2021-11-07 21:51:12.346[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[nfoReplicator-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m DiscoveryClient_UNKNOWN/DESKTOP-9G5CUP8:8085 - registration status: 204
[2m2021-11-07 21:51:12.388[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[ main][0;39m [36mc.e.m.C.CitizenDetailServiceApplication [0;39m [2m:[0;39m Started CitizenDetailServiceApplication in 4.053 seconds (JVM running for 4.652)
[2m2021-11-07 21:51:42.285[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Disable delta property : false
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Single vip registry refresh property : null
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Force full registry fetch : false
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Application is null : false
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Registered Applications size is zero : true
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Application version is -1: false
[2m2021-11-07 21:51:42.286[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m Getting all instance registry info from the eureka server
[2m2021-11-07 21:51:42.295[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[freshExecutor-0][0;39m [36mcom.netflix.discovery.DiscoveryClient [0;39m [2m:[0;39m The response status is 200
[2m2021-11-07 21:51:57.793[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[nio-8085-exec-1][0;39m [36mo.a.c.c.C.[Tomcat].[localhost].[/] [0;39m [2m:[0;39m Initializing Spring DispatcherServlet 'dispatcherServlet'
[2m2021-11-07 21:51:57.793[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[nio-8085-exec-1][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m Initializing Servlet 'dispatcherServlet'
[2m2021-11-07 21:51:57.796[0;39m [32m INFO[0;39m [35m27720[0;39m [2m---[0;39m [2m[nio-8085-exec-1][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m Completed initialization in 3 ms
Any help will be appreciated. Thanx in advance
CodePudding user response：
If you are getting a 404 error page, it means that SpringBoot does not have a request mapping from this URI path to a specific controller method.
This can happen for 2 main reasons ...
- You are using the wrong request URI
- You did not create a controller bean, which is mapped to this URI
Given that I see the code for the controller bean, this means its a wrong URI.
If you did not change any of the configurations in application.properties the path you should be using to get the data should be http://localhost:8080/citizen/test. Try it out with this one ... if it does not work ... please add the output, which SpringBoot prints when starting the app to the original question. Also add a comment to this answer, so I get notified and can respond.
CodePudding user response：
The issue is that your Controller is not being scanned and thus no Spring-managed Bean is created. Move your main CitizenDetailServiceApplication class to the package com.example.microservices, which should be your parent package for any other sub-packages you create.
package com.example.microservices;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class CitizenDetailServiceApplication {
public static void main(String[] args) {
SpringApplication.run(CitizenDetailServiceApplication.class, args);
}
}
@SpringBootApplication encapsulates @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations with their default attributes. The default value for @ComponentScan means that all the sub-packages on the package the @ComponentScan is used are scanned. That is why it is usually a good practice to include the main class in the base package of the project.