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Succesfully deployed Spring MVC webapp responds 404

pls, bear with me as I am a beginner and this is also my first question placed here.
I am having the following problem:
I have a Spring MVC web app deployed with a CI/CD procedure, an AWS EC2 instance, three docker containers: one is the app, another is MySQL and then the third one is Tomcat. It is a maven project, built with Jenkins from a Github repo. The instance is up, containers are running and communicating, war file is deployed successfully by Jenkins, the app is present on tomcats manager.html.
Deployment is java based without web.xml. No Docker file either, the app container is on Jenkins BlueOcean. For one thing that I've noticed, the WebApplicationInitializer and the config files are not being included in the war file, not sure if it is supposed to be this way or not...
This is as far as I have come. App doesn't respond. Unfortunately, I've never seen a java web app deployed this way, or in any other way for that matter, so I am entirely at a loss. On my localhost it was working fine. Any help is greatly appreciated, thank you in advance! Please let me know if further code is needed.
This is my WebApplicationInitializer implementation:
public class SOAppInitializer implements WebApplicationInitializer {
#Override
public void onStartup(ServletContext container) {
XmlWebApplicationContext appContext = new XmlWebApplicationContext();
appContext.setConfigLocation("classpath:application-config.xml");
DispatcherServlet dispatcherServlet = new DispatcherServlet(appContext);
ServletRegistration.Dynamic registration = container.addServlet("dispatcher", dispatcherServlet);
registration.setLoadOnStartup(1);
registration.addMapping("/");
}
}
and the configuration
#EnableWebMvc
#ComponentScan(basePackages = "com.ownproject.S********r")
#Configuration
public class AppConfig extends WebMvcConfigurerAdapter {
// Resolve logical view names to .html resources in the /WEB-INF/views directory
#Bean
ViewResolver viewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("WEB-INF/classes/templates");
return resolver;
}
#Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.ownproject</groupId>
<artifactId>Service-Organizer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Service-Organizer</name>
<packaging>war</packaging>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</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-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity5</artifactId>
<version>3.0.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.141.59</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-chrome-driver</artifactId>
<version>3.141.59</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-firefox-driver</artifactId>
<version>3.141.59</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>1.3</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.3.2</version>
<type>maven-plugin</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.3.2</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
</project>
Docker.ps
Tomcat screenshot

Spring boot application returns 404 without entering controller class

Spring boot application returns 404 Not found error when calling API endpoints without even entering the controller class
I have gone through the possible solutions which can be found on the StackOverflow
possible solutions I have tested
added and removed #RequestMapping at the class level
tested with both
GetMapping("/get")
and
RequestMapping("/get")
and even with
GetMapping(value = "/get")
added #ComponentScan even when my folder structure is as per the guidelines.
tried with ResponseEntity<Object> and #RequestBody Annotation
I've tried almost all of the solutions I got from various platforms. Spring boot application API endpoints should call the corresponding methods based on their paths configured. But in my application, it throws an error with '404 Not Found' when any endpoint called. It seems the endpoints are not registered in the spring application
controller Class
#RestController
#RequestMapping(BACK_OFFICE_BASE_PATH)
public class ManagementController {
#Autowired
ManagementService managementService;
#GetMapping( SLASH_PATH)
public List<RateTemp> getUpdateRequests(){
return managementService.getUpdateRequests();
}
#PostMapping( SLASH_PATH)
public RateTemp addRate(#RequestBody RateTemp body) throws BadRequestException {
if(body != null){
return managementService.addRate(body);
}else throw new BadRequestException(ILLEGAL_REQUEST_FIELDS,"");
}
}
pom.xml
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<java.version>1.8</java.version>
<springfox-version>3.0.0</springfox-version>
<log4j2.version>2.16.0</log4j2.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.3.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.7.0</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-rest-hal-explorer</artifactId>
</dependency>
<dependency>
<groupId>com.warrenstrange</groupId>
<artifactId>googleauth</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--springfox for swagger -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-oas</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>com.github.joschi.jackson</groupId>
<artifactId>jackson-datatype-threetenbp</artifactId>
<version>2.6.4</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
<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>

I've found a solution for my problem without even understanding it.
Anyway, it started working when I assigned a separate path for each and every method.
In my previous code, I have assigned the same path value for different HTTP methods(GET, POST, PUT, etc.). I have done this before, but I never got this error ever. Im trying to understand the cause of this error.
thanks for your suggestion
#RestController
#RequestMapping(BACK_OFFICE_BASE_PATH)
public class ManagementController {
#Autowired
ManagementService managementService;
#GetMapping( SLASH_PATH + "add")
public List<RateTemp> getUpdateRequests(){
return managementService.getUpdateRequests();
}
#PostMapping( SLASH_PATH + "update")
public RateTemp addRate(#RequestBody RateTemp body) throws BadRequestException {
if(body != null){
return managementService.addRate(body);
}else throw new BadRequestException(ILLEGAL_REQUEST_FIELDS,"");
}
}

The import de.codecentric.boot.admin.server.config.EnableAdminServer cannot be resolved

I am developing the Microservices code by taking reference from https://github.com/spring-petclinic/spring-petclinic-microservices. I was able to successfully run all the modules, but I'm getting the below error.
The import de.codecentric.boot.admin.server.config.EnableAdminServer cannot be resolved
From the spring-petclinic-admin-server module, I am getting the below error.
import de.codecentric.boot.admin.server.config.EnableAdminServer;
#Configuration
#EnableAutoConfiguration
#EnableAdminServer
#EnableDiscoveryClient
public class SpringBootAdminApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootAdminApplication.class, args);
}
}
I was able to start the other microservices modules.
pom.xml
<parent>
<groupId>org.springframework.samples</groupId>
<artifactId>spring-petclinic-microservices</artifactId>
<version>2.0.4</version>
</parent>
<properties>
<spring-boot-admin.version>2.0.1</spring-boot-admin.version>
<docker.image.exposed.port>9090</docker.image.exposed.port>
<docker.image.dockerfile.dir>${basedir}/../docker</docker.image.dockerfile.dir>
</properties>
<dependencies>
<!-- Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- Spring Boot Admin -->
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
<version>${spring-boot-admin.version}</version>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server-ui</artifactId>
<version>${spring-boot-admin.version}</version>
</dependency>
<!-- Third-party librairies -->
<dependency>
<groupId>org.jolokia</groupId>
<artifactId>jolokia-core</artifactId>
</dependency>
</dependencies>

As per the link : https://codecentric.github.io/spring-boot-admin/current/. I have added below dependencies, then it works well.
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
<version>2.1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

Prometheus metrics - not found

I have spring boot application and i am using vertx.
I want to monitor the services and the jvm and for that i chose Prometheus.
This is my MonitoringConfig class:
#Configuration
public class MonitoringConfig {
#Bean
SpringBootMetricsCollector springBootMetricsCollector(Collection<PublicMetrics> publicMetrics) {
SpringBootMetricsCollector springBootMetricsCollector = new SpringBootMetricsCollector(publicMetrics);
springBootMetricsCollector.register();
return springBootMetricsCollector;
}
#Bean
public ServletRegistrationBean servletRegistrationBean() {
DefaultExports.initialize();
return new ServletRegistrationBean(new MetricsServlet(), "/prometheus");
}
}
And this are my dependencies:
<dependency>
<groupId>com.moelholm</groupId>
<artifactId>prometheus-spring-boot-starter</artifactId>
<version>1.0.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.prometheus/simpleclient -->
<dependency>
<groupId>io.prometheus</groupId>
<artifactId>simpleclient</artifactId>
<version>0.0.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.prometheus/simpleclient_hotspot -->
<dependency>
<groupId>io.prometheus</groupId>
<artifactId>simpleclient_hotspot</artifactId>
<version>0.0.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.prometheus/simpleclient_spring_boot -->
<dependency>
<groupId>io.prometheus</groupId>
<artifactId>simpleclient_spring_boot</artifactId>
<version>0.0.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.prometheus/simpleclient_servlet -->
<dependency>
<groupId>io.prometheus</groupId>
<artifactId>simpleclient_servlet</artifactId>
<version>0.0.25</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.hateoas</groupId>
<artifactId>spring-hateoas</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
It shows no error in the app, but when i am trying to access http://localhost:8787/prometheus i am getting Not Found.
Also i have tried only with actuator and it still the same.
http://localhost:8787/actuator, http://localhost:8787/health and etc. Allways getting: Not found.
So my question is what can cause this and how can i fix this problem?

I think that some of the dependencies is causing the problem. Try removing one by one and you can notice where is the problem.
Also for monitoring vert.x application here is a good example that can be useful for you.
About the jvm metrics, add this in your start:
DefaultExports.initialize();
new DropwizardExports(SharedMetricRegistries.getOrCreate("vertx")).register();

Spring boot custom starter , application doesn't find required bean

http://www.baeldung.com/spring-boot-custom-starter
I have followed tutorial and github example provided from the link above and have implemented similar way. I am using spring-boot-starter-parent :2.0.0.M3. Even after including my custom starter dependency in the pom for the app, it doesn't find required bean without #componentScan while deploying it.
It is giving following error.
APPLICATION FAILED TO START
Description:
Field fooApiCaller in com.core.controller.TestController required a bean of type 'service.ApiCaller' that could not be found.
Action:
Consider defining a bean of type 'service.ApiCaller' in your configuration.
Sample App ( one throwing error)
pom.xml
<dependency>
<groupId>abc.def</groupId>
<artifactId>custom-starter</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
#Controller
public class FooController {
#Autowired
ApiCaller fooApiCaller
}
custom-starter module pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>abc.def</groupId>
<artifactId>custom-spring-boot-autoconfigure</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>abc.def</groupId>
<artifactId>myapi</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
Autoconfiguration module dependency
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<version>${spring-boot.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>abc.def</groupId>
<artifactId>myapi</artifactId>
<version>${project.version}</version>
<optional>true</optional>
</dependency>
</dependencies>
spring factories code
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
abc.def.myapi.autoconfigure.AutoConfiguration
MyAPI product
#Service
#Configuration
public class ApiCaller {
public String getName(String Id){return "name";}
}