Develop Reference

Sping Boot Java backend application process gets killed

I have packaged my spring boot rest backend with mvn package.
When I run the jar on the server with java -jar ... the application starts and gets killed after a few seconds.
I also see that on the linux top view, that the java process goes over 300% CPU. Is that maybe the reason the process gets killed? And if yes, what can I do?
My spring boot application is not very big. Actually its almost empty.
Logs:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.2.RELEASE)
2020-01-26 07:40:36.423 INFO 8144 --- [ main] d.c.c.CarorderprocessApplication : Starting CarorderprocessApplication v0.0.1-SNA
PSHOT on dedi1055.your-server.de with PID 8144 (/usr/www/users/waqfek/software_backend/carorderprocess-0.0.1-SNAPSHOT.jar started by waqfek in /us
r/www/users/waqfek/software_backend)
2020-01-26 07:40:36.426 INFO 8144 --- [ main] d.c.c.CarorderprocessApplication : No active profile set, falling back to default
profiles: default
2020-01-26 07:40:36.487 INFO 8144 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servle
t.context.AnnotationConfigServletWebServerApplicationContext#5cbc508c: startup date [Sun Jan 26 07:40:36 CET 2020]; root of context hierarchy
2020-01-26 07:40:37.614 INFO 8144 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotati
on.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerB
ySpringCGLIB$$d289c8bd] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-01-26 07:40:37.915 INFO 8144 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2020-01-26 07:40:37.939 INFO 8144 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-01-26 07:40:37.940 INFO 8144 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2020-01-26 07:40:37.949 INFO 8144 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library whi
ch allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib/x86_64-lin
ux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib]
2020-01-26 07:40:38.014 INFO 8144 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationCon
text
2020-01-26 07:40:38.014 INFO 8144 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization com
pleted in 1530 ms
2020-01-26 07:40:38.159 INFO 8144 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to:
[/*]
2020-01-26 07:40:38.159 INFO 8144 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [
/*]
2020-01-26 07:40:38.159 INFO 8144 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to:
[/*]
2020-01-26 07:40:38.159 INFO 8144 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*
]
2020-01-26 07:40:38.160 INFO 8144 --- [ost-startStop-1] .s.DelegatingFilterProxyRegistrationBean : Mapping filter: 'springSecurityFilterChain' to
: [/*]
2020-01-26 07:40:38.160 INFO 8144 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2020-01-26 07:40:38.302 INFO 8144 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-01-26 07:40:38.306 WARN 8144 --- [ main] com.zaxxer.hikari.util.DriverDataSource : Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2020-01-26 07:40:38.491 INFO 8144 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-01-26 07:40:38.534 INFO 8144 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2020-01-26 07:40:38.548 INFO 8144 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2020-01-26 07:40:38.625 INFO 8144 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2020-01-26 07:40:38.627 INFO 8144 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2020-01-26 07:40:38.661 INFO 8144 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2020-01-26 07:40:38.824 INFO 8144 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2020-01-26 07:40:39.086 INFO 8144 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-01-26 07:40:39.172 INFO 8144 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-01-26 07:40:39.406 INFO 8144 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#5cbc508c: startup date [Sun Jan 26 07:40:36 CET 2020]; root of context hierarchy
2020-01-26 07:40:39.444 WARN 8144 --- [ main] 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
2020-01-26 07:40:39.492 INFO 8144 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-01-26 07:40:39.494 INFO 8144 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-01-26 07:40:39.526 INFO 8144 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-01-26 07:40:39.526 INFO 8144 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-01-26 07:40:39.867 INFO 8144 --- [ main] .s.s.UserDetailsServiceAutoConfiguration :
Using generated security password: 8167df1e-24d1-4ebf-bb03-53e2385a1229
2020-01-26 07:40:40.030 INFO 8144 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: org.springframework.security.web.util.matcher.AnyRequestMatcher#1, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter#d2de489, org.springframework.security.web.context.SecurityContextPersistenceFilter#28cda624, org.springframework.security.web.header.HeaderWriterFilter#5340477f, org.springframework.security.web.csrf.CsrfFilter#6f15d60e, org.springframework.security.web.authentication.logout.LogoutFilter#71687585, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter#66ea810, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter#5276d6ee, org.springframework.security.web.authentication.www.BasicAuthenticationFilter#2f953efd, org.springframework.security.web.savedrequest.RequestCacheAwareFilter#7eecb5b8, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter#475c9c31, org.springframework.security.web.authentication.AnonymousAuthenticationFilter#14bdbc74, org.springframework.security.web.session.SessionManagementFilter#7139992f, org.springframework.security.web.access.ExceptionTranslationFilter#446a1e84, org.springframework.security.web.access.intercept.FilterSecurityInterceptor#169bb4dd]
2020-01-26 07:40:40.112 INFO 8144 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2020-01-26 07:40:40.113 INFO 8144 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2020-01-26 07:40:40.118 INFO 8144 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2020-01-26 07:40:40.142 INFO 8144 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8081 (http) with context path ''
2020-01-26 07:40:40.145 INFO 8144 --- [ main] d.c.c.CarorderprocessApplication : Started CarorderprocessApplication in 4.002 seconds (JVM running for 4.521)
Killed
...
top - 08:51:43 up 137 days, 11:30, 2 users, load average: 0.86, 0.39, 0.30
Tasks: 4 total, 1 running, 3 sleeping, 0 stopped, 0 zombie
%Cpu(s): 30.7 us, 0.9 sy, 0.0 ni, 68.1 id, 0.2 wa, 0.0 hi, 0.1 si, 0.0 st
KiB Mem : 16119112 total, 4416660 free, 7332300 used, 4370152 buff/cache
KiB Swap: 4194300 total, 3625572 free, 568728 used. 8221460 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20338 waqfek 20 0 7069792 299952 16808 S 247.5 1.9 0:07.45 java
16765 waqfek 20 0 38960 3032 2704 R 0.0 0.0 0:00.57 top
27373 waqfek 20 0 14092 3600 3048 S 0.0 0.0 0:00.16 bash
28746 waqfek 20 0 14072 3524 2988 S 0.0 0.0 0:00.00 bash
I only have three files in my project:
1.:
package ...
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class CarorderprocessApplication {
public static void main(String[] args) {
SpringApplication.run(CarorderprocessApplication.class, args);
}
}
Then I have application.properties file with information for database connection and port.
pom.xml:
https://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.0.2.RELEASE
de.countandcare
carorderprocess
0.0.1-SNAPSHOT
carorderprocess
Demo project for Spring Boot
<dependencyManagement>
<dependencies>
</dependencies>
</dependencyManagement>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
<version>2.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.5.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

Some ideas to check:
Try to run as detached: java -jar yourapp.jar &
Try ( just once ) to run under root
Check logs: journalctl -ex for details of who exactly has killed your application.
Depends on results, can plan next steps - typically which settings to adjust.

problem with spring boot component scanning

I am writing spring boot application which has two entity classes Teacher and Department. I am using JPA and H2 in-memory database. When i run the application tables are not creating in h2 database. I have specified package to scan using #componentScan annotation but i thinks spring is not finding location of entity classes.
Application class-
package com.H2DatabaseDemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
#ComponentScan(basePackages="com.H2DatabaseDemo")
public class H2DatabaseDemoApplication {
public static void main(String[] args) {
SpringApplication.run(H2DatabaseDemoApplication.class, args);
}
}
Aauthor Entity-
package com.H2DatabaseDemo.model;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
#Entity
public class Author {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private long id;
private String title;
private String body;
public Author() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
}
Post entity-
package com.H2DatabaseDemo.model;
import java.awt.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
#Entity
public class Post {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private long id;
private String name;
public Post() {}
public Post(long id, String name) {
this.id = id;
this.name = name;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Here is my project directory structure
here is my pom.xml file-
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.H2DatabaseDemo</groupId>
<artifactId>H2DatabaseDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>H2DatabaseDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.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>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Stack trace-
:: Spring Boot :: (v2.0.4.RELEASE)
2018-09-13 18:00:07.448 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : Starting H2DatabaseDemoApplication on DESKTOP-7NILS0D with PID 12584 (D:\springCourse\H2DatabaseDemo\target\classes started by Mrugesh in D:\springCourse\H2DatabaseDemo)
2018-09-13 18:00:07.453 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : No active profile set, falling back to default profiles: default
2018-09-13 18:00:07.539 INFO 12584 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#17c1bced: startup date [Thu Sep 13 18:00:07 IST 2018]; root of context hierarchy
2018-09-13 18:00:09.114 INFO 12584 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$934327a5] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-09-13 18:00:09.860 INFO 12584 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-09-13 18:00:09.892 INFO 12584 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-09-13 18:00:09.893 INFO 12584 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.32
2018-09-13 18:00:09.903 INFO 12584 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_171\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jre1.8.0_171/bin/server;C:/Program Files/Java/jre1.8.0_171/bin;C:/Program Files/Java/jre1.8.0_171/lib/amd64;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;c:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\nodejs\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Program Files\Microsoft VS Code\bin;C:\Program Files\Microsoft VS Code\bin;C:\Users\Mrugesh\AppData\Roaming\npm;C:\Users\Mrugesh\AppData\Local\Microsoft\WindowsApps;C:\Users\Mrugesh\AppData\Local\GitHubDesktop\bin;C:\eclipse;;.]
2018-09-13 18:00:10.046 INFO 12584 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-09-13 18:00:10.047 INFO 12584 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2516 ms
2018-09-13 18:00:10.173 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-09-13 18:00:10.179 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet webServlet mapped to [/console/]
2018-09-13 18:00:10.188 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/]
2018-09-13 18:00:10.189 INFO 12584 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-09-13 18:00:10.392 INFO 12584 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-09-13 18:00:10.667 INFO 12584 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2018-09-13 18:00:10.733 INFO 12584 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-09-13 18:00:10.754 INFO 12584 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-09-13 18:00:10.863 INFO 12584 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2018-09-13 18:00:10.864 INFO 12584 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-09-13 18:00:10.910 INFO 12584 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-09-13 18:00:11.034 INFO 12584 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2018-09-13 18:00:11.581 INFO 12584 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl#6bcc3f27'
2018-09-13 18:00:11.585 INFO 12584 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-09-13 18:00:11.700 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [//favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.010 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#17c1bced: startup date [Thu Sep 13 18:00:07 IST 2018]; root of context hierarchy
2018-09-13 18:00:12.060 WARN 12584 --- [ main] 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
2018-09-13 18:00:12.147 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-09-13 18:00:12.149 INFO 12584 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-09-13 18:00:12.183 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.183 INFO 12584 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-09-13 18:00:12.558 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-09-13 18:00:12.560 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2018-09-13 18:00:12.565 INFO 12584 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2018-09-13 18:00:12.605 INFO 12584 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2018-09-13 18:00:12.610 INFO 12584 --- [ main] c.H.H2DatabaseDemoApplication : Started H2DatabaseDemoApplication in 5.598 seconds (JVM running for 6.203)

Your entities classes are fine but your H2 console is configured with the default db (testdb if i'm not wrong). You should at least specify the URL in your H2 Console to match your db name or the other way around.
You may try the following approach:
1 In the application.properties file configure H2 console access control:
spring.h2.console.enabled=true
spring.h2.console.path=/h2-console
spring.datasource.url=jdbc:h2:mem:hddemo-app
2 Access the db from http://localhost:8080/h2-console/
3 Inside the H2 Console, Copy and paste jdbc:h2:mem:hddemo-app in the JDBC URL field. Leave the password field empty and click the connect button.
4 You should see the entity you specified in your project as a table.

Try configurate
hibernate.hbm2ddl.auto
value to be create by adding following line in the application.properties.
spring.jpa.hibernate.ddl-auto=create
I have the same problem so I tried this and it works.
Hope this helps.

In Spring you have two annotations for scanning:
- ComponentScan for scanning Component annotated classes and generating beans out of them (https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/annotation/ComponentScan.html), and
- EntityScan for generating information for JPA and others for the entities (https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/autoconfigure/domain/EntityScan.html)
In your case, since you are trying to generate entitites and not beans/components, you should use #EntityScan.
N.B.: Spring also supports auto configuration: https://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-auto-configuration.html

My spring-app doesn't receive my GET

So I've been trying to do the example from spring's official guide on connecting Spring with MySQL (https://spring.io/guides/gs/accessing-data-mysql/)
I didn't follow it 100% since I'm using STS for my overall project. The thing is when I use POSTMAN or just my browser to send data
such as :
localhost:8000/demo/add?name=First&email=someemail#someemailprovider.com
I get the error not found.
The java code is the same as in the guide . My application.properties is this:
server.port=8000
spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:mysql://localhost:3306/db_example
spring.datasource.username=springuser
spring.datasource.password=ThePassword
and my pom.xml is this
<?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
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>dbDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>dbDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.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>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
The answer from my browser is:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing
this as a fallback.
Tue Jul 10 21:15:52 EEST 2018
There was an unexpected error (type=Not Found, status=404).
No message available
And from postman :
{
"timestamp": "2018-07-10T18:08:28.208+0000",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/demo/add"
}
The log from spring's console is :
:: Spring Boot :: (v2.0.3.RELEASE)
2018-07-10 20:32:36.453 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : Starting DbDemoApplication on max-kans with PID 7815 (/home/max/Desktop/Fetina/Earino/projectTL/softEngine/dbDemo/target/classes started by max in /home/max/Desktop/Fetina/Earino/projectTL/softEngine/dbDemo)
2018-07-10 20:32:36.496 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : No active profile set, falling back to default profiles: default
2018-07-10 20:32:36.742 INFO 7815 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#2aa5fe93: startup date [Tue Jul 10 20:32:36 EEST 2018]; root of context hierarchy
2018-07-10 20:32:41.650 INFO 7815 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$5ab04215] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-07-10 20:32:42.775 INFO 7815 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8000 (http)
2018-07-10 20:32:43.344 INFO 7815 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-07-10 20:32:43.344 INFO 7815 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-07-10 20:32:44.326 INFO 7815 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-07-10 20:32:47.580 INFO 7815 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-07-10 20:32:47.581 INFO 7815 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 10868 ms
2018-07-10 20:32:48.187 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-07-10 20:32:48.192 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-07-10 20:32:48.193 INFO 7815 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-07-10 20:32:50.090 INFO 7815 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-07-10 20:32:54.757 INFO 7815 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2018-07-10 20:32:55.307 INFO 7815 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-07-10 20:32:55.640 INFO 7815 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-07-10 20:32:58.848 INFO 7815 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2018-07-10 20:32:59.125 INFO 7815 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-07-10 20:33:00.513 INFO 7815 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-07-10 20:33:02.175 INFO 7815 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2018-07-10 20:33:03.329 INFO 7815 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl#7a8406c2'
2018-07-10 20:33:03.331 INFO 7815 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-07-10 20:33:06.623 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:08.065 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#2aa5fe93: startup date [Tue Jul 10 20:32:36 EEST 2018]; root of context hierarchy
2018-07-10 20:33:08.206 WARN 7815 --- [ main] 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
2018-07-10 20:33:08.322 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-07-10 20:33:08.324 INFO 7815 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-07-10 20:33:08.368 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:08.368 INFO 7815 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-10 20:33:09.610 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-07-10 20:33:09.613 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2018-07-10 20:33:09.622 INFO 7815 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2018-07-10 20:33:10.003 INFO 7815 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8000 (http) with context path ''
2018-07-10 20:33:10.154 INFO 7815 --- [ main] com.example.demo.DbDemoApplication : Started DbDemoApplication in 35.885 seconds (JVM running for 39.933)
2018-07-10 20:34:07.354 INFO 7815 --- [nio-8000-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-07-10 20:34:07.354 INFO 7815 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-07-10 20:34:07.962 INFO 7815 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 608 ms
My controller is pretty much identical to the one from spring's guide :
package hello;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import hello.User;
import hello.UserRepository;
#Controller // This means that this class is a Controller
#RequestMapping(path="/demo")
// This means URL's start with /demo (after Application path)
public class UserController {
#Autowired
// This means to get the bean called userRepository
// Which is auto-generated by Spring, we will use it to handle the data
private UserRepository userRepository;
#GetMapping(path="/add") // Map ONLY GET Requests
public #ResponseBody String addNewUser(#RequestParam String name,
#RequestParam String email) {
// #ResponseBody means the returned String is the response,
// not a view name
User n = new User();
n.setName(name);
n.setEmail(email);
userRepository.save(n);
return "Saved";
}
#GetMapping(path="/all")
public #ResponseBody Iterable<User> getAllUsers() {
// This returns a JSON or XML with the users
return userRepository.findAll();
}
}

Your #SpringBootApplication class is in the package com.example.demo (according to the startup log), but your #Controller is in package hello. By default, Spring Boot won't auto-discover Spring classes that are outside the package the #SpringBootApplication class is in. Either move the UserController somewhere under the com.example.demo, or add #ComponentScan annotation targeting your hello package to the main Spring Boot app class.

Springboot endpoint fails when the war is deploy in an external Tomcat

I am working with springboot 1.5.9 and the extarnal version of the Tomcat is 8.5.7. First I generate the initial package with Spring Initializr without choose any option. After I create a class controller and write a method with a endpoint (Get method) which returns a String.
package com.test;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
public class TestController {
#RequestMapping(value = "/test")
public String index() {
return "REST API HERE ";
}
}
If I run the api with the embedded tomcat and make a call with postman all works fine.
:: Spring Boot :: (v1.5.9.RELEASE)
2018-01-25 20:50:29.954 INFO 5944 --- [ main] com.test.TestApplication : Starting TestApplication on Alvaro with PID 5944 (C:\Projects\dev\test\target\classes started by Alvaro in C:\Projects\dev\test)
2018-01-25 20:50:29.956 INFO 5944 --- [ main] com.test.TestApplication : No active profile set, falling back to default profiles: default
2018-01-25 20:50:29.982 INFO 5944 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3439f68d: startup date [Thu Jan 25 20:50:29 CET 2018]; root of context hierarchy
2018-01-25 20:50:30.697 INFO 5944 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-01-25 20:50:30.709 INFO 5944 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
018-01-25 20:50:30.710 INFO 5944 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2018-01-25 20:50:30.768 INFO 5944 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-01-25 20:50:30.768 INFO 5944 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 787 ms
2018-01-25 20:50:30.865 INFO 5944 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-01-25 20:50:30.868 INFO 5944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-01-25 20:50:30.869 INFO 5944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-01-25 20:50:30.869 INFO 5944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-01-25 20:50:30.869 INFO 5944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-01-25 20:50:31.040 INFO 5944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3439f68d: startup date [Thu Jan 25 20:50:29 CET 2018]; root of context hierarchy
2018-01-25 20:50:31.077 INFO 5944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public java.lang.String com.test.TestController.index()
2018-01-25 20:50:31.079 INFO 5944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-01-25 20:50:31.079 INFO 5944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-01-25 20:50:31.096 INFO 5944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 20:50:31.096 INFO 5944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 20:50:31.116 INFO 5944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 20:50:31.191 INFO 5944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-01-25 20:50:31.234 INFO 5944 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-01-25 20:50:31.236 INFO 5944 --- [ main] com.test.TestApplication : Started TestApplication in 1.434 seconds (JVM running for 1.633)
2018-01-25 20:54:31.002 INFO 5944 --- [nio-8080-exec-4] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-01-25 20:54:31.002 INFO 5944 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-01-25 20:54:31.011 INFO 5944 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 9 ms
Test with postman with enbedded tomcat
After that I generate the war (using package) and put into a external tomcat. When the tomcat deploy the war there is not errors.
2018-01-25 21:14:29.713 INFO 8508 --- [ost-startStop-1] com.test.ServletInitializer : Starting ServletInitializer v0.0.1-SNAPSHOT on Alvaro with PID 8508 (C:\apache-tomcat-8.5.27\webapps\test-0.0.1-SNAPSHOT\WEB-INF\classes started by Alvaro in C:\apache-tomcat-8.5.27\bin)
2018-01-25 21:14:29.714 INFO 8508 --- [ost-startStop-1] com.test.ServletInitializer : No active profile set, falling back to default profiles: default
2018-01-25 21:14:29.754 INFO 8508 --- [ost-startStop-1] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#562627a1: startup date [Thu Jan 25 21:14:29 CET 2018]; root of context hierarchy
2018-01-25 21:14:30.390 INFO 8508 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 636 ms
2018-01-25 21:14:30.708 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-01-25 21:14:30.710 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'errorPageFilter' to: [/*]
2018-01-25 21:14:30.710 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-01-25 21:14:30.710 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-01-25 21:14:30.710 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-01-25 21:14:30.710 INFO 8508 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-01-25 21:14:31.002 INFO 8508 --- [ost-startStop-1] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#562627a1: startup date [Thu Jan 25 21:14:29 CET 2018]; root of context hierarchy
2018-01-25 21:14:31.068 INFO 8508 --- [ost-startStop-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public java.lang.String com.test.TestController.index()
2018-01-25 21:14:31.071 INFO 8508 --- [ost-startStop-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-01-25 21:14:31.072 INFO 8508 --- [ost-startStop-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-01-25 21:14:31.094 INFO 8508 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 21:14:31.094 INFO 8508 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 21:14:31.125 INFO 8508 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-25 21:14:31.219 INFO 8508 --- [ost-startStop-1] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-01-25 21:14:31.232 INFO 8508 --- [ost-startStop-1] com.test.ServletInitializer : Started ServletInitializer in 1.854 seconds (JVM running for 3.885)
2018-2018 21:14:31.249 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [C:\apache-tomcat-8.5.27\webapps\test-0.0.1-SNAPSHOT.war] has finished in [3.429] ms
2018-2018 21:14:31.250 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Despliegue del directorio [C:\apache-tomcat-8.5.27\webapps\docs] de la aplicaci¾n web
2018-2018 21:14:31.262 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [C:\apache-tomcat-8.5.27\webapps\docs] has finished in [12] ms
2018-2018 21:14:31.262 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Despliegue del directorio [C:\apache-tomcat-8.5.27\webapps\examples] de la aplicaci¾n web
2018-2018 21:14:31.400 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [C:\apache-tomcat-8.5.27\webapps\examples] has finished in [138] ms
2018-2018 21:14:31.401 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Despliegue del directorio [C:\apache-tomcat-8.5.27\webapps\host-manager] de la aplicaci¾n web
2018-2018 21:14:31.414 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [C:\apache-tomcat-8.5.27\webapps\host-manager] has finished in [14] ms
2018-2018 21:14:31.414 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Despliegue del directorio [C:\apache-tomcat-8.5.27\webapps\manager] de la aplicaci¾n web
2018-2018 21:14:31.426 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [C:\apache-tomcat-8.5.27\webapps\manager] has finished in [12] ms
2018-2018 21:14:31.426 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Despliegue del directorio [C:\apache-tomcat-8.5.27\webapps\ROOT] de la aplicaci¾n web
2018-2018 21:14:31.437 INFORMACIËN [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [C:\apache-tomcat-8.5.27\webapps\ROOT] has finished in [11] ms
2018-2018 21:14:31.440 INFORMACIËN [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
2018-2018 21:14:31.447 INFORMACIËN [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
2018-2018 21:14:31.449 INFORMACIËN [main] org.apache.catalina.startup.Catalina.start Server startup in 3656 ms
But when I do the same text with postman, i receive a 404 error:
Postman error with the war deploy in an external Tomcat
Here is the 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0 </modelVersion>
<groupId>com </groupId>
<artifactId>test </artifactId>
<version>0.0.1-SNAPSHOT </version>
<packaging>war </packaging>
<name>test </name>
<description>test </description>
<parent>
<groupId>org.springframework.boot </groupId>
<artifactId>spring-boot-starter-parent </artifactId>
<version>1.5.9.RELEASE </version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8 </project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8 </project.reporting.outputEncoding>
<java.version>1.8 </java.version>
</properties>
<dependencies>
<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>
<scope>provided </scope>
</dependency>
<dependency>
<groupId>org.springframework.boot </groupId>
<artifactId>spring-boot-starter-test </artifactId>
<scope>test </scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot </groupId>
<artifactId>spring-boot-maven-plugin </artifactId>
</plugin>
</plugins>
</build>
</project>
I'm lost because I don't know if the problem is with the external tomcat configuration, or with the springboot package.
I checked a lot of things:
I follow all the steps to deploy an external war with springboot (in fact, the war deploy without errors) Like this doc indicate: https://docs.spring.io/spring-boot/docs/current/reference/html/howto-traditional-deployment.html
I checked if the the port 8080 in the external tomcat was open.
I tested in diferents tomcats (one in windows and two in linux).
I checked the java version.
But nothing seems to work.
If you need more info please ask me. Thank you for your help!
I added the follow web.xml in test/src/main/webapp/WEB-INF/web.xml. But the problem continue.
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<param-name>contextConfigLocation </param-name>
<param-value>test.Application </param-value>
</context-param>
<listener>
<listener-class>org.springframework.boot.legacy.context.web.SpringBootContextLoaderListener </listener-class>
</listener>
<filter>
<filter-name>metricsFilter </filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy </filter-class>
</filter>
<filter-mapping>
<filter-name>metricsFilter </filter-name>
<url-pattern>/* </url-pattern>
</filter-mapping>
<servlet>
<servlet-name>appServlet </servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet </servlet-class>
<init-param>
<param-name>contextAttribute </param-name>
<param-value>org.springframework.web.context.WebApplicationContext.ROOT </param-value>
</init-param>
<load-on-startup>1 </load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet </servlet-name>
<url-pattern>/ </url-pattern>
</servlet-mapping>
</web-app>

By default, Tomcat will use the name of the WAR as the context to which your app will be deployed. In your case, the context name will be test-0.0.1-SNAPSHOT so the URL to access your app will be http://localhost:8080/test-0.0.1-SNAPSHOT/.
If you want your app to be deployed at the root, you may name your file ROOT.war. You can also specify a different context name in a context.xml file (included or external to your war).
See Tomcat doc about context here

How to access h2-console with a Netbeans Spring-Boot project

I'm using spring boot 1.5.4, i'm following a tutorial where it shows that just by adding h2-console to the localhost:8080/ url you can access the console. But when i do that i have a 404 Whitelabel error.
These are the dependencies
<dependencies>
<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.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--WebJars-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.5</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.2.1</version>
</dependency>
<!--jpa and database-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
And this is the spring boot console log
2017-07-19 01:35:25.222 INFO 8644 --- [ main] c.e.s.SpringBootTest00Application : Starting SpringBootTest00Application on DESKTOP-K8Q0B2R with PID 8644 (started by Talon in C:\Users\Talon\Desktop\java netbeans\01\springBootTest00)
2017-07-19 01:35:25.225 INFO 8644 --- [ main] c.e.s.SpringBootTest00Application : No active profile set, falling back to default profiles: default
2017-07-19 01:35:25.544 INFO 8644 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#37574691: startup date [Wed Jul 19 01:35:25 CEST 2017]; root of context hierarchy
2017-07-19 01:35:27.236 INFO 8644 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-07-19 01:35:27.248 INFO 8644 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-07-19 01:35:27.249 INFO 8644 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.15
2017-07-19 01:35:27.378 INFO 8644 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-07-19 01:35:27.378 INFO 8644 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1838 ms
2017-07-19 01:35:27.578 INFO 8644 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-07-19 01:35:27.582 INFO 8644 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-07-19 01:35:27.584 INFO 8644 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-07-19 01:35:27.584 INFO 8644 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-07-19 01:35:27.584 INFO 8644 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-07-19 01:35:28.020 INFO 8644 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2017-07-19 01:35:28.037 INFO 8644 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2017-07-19 01:35:28.122 INFO 8644 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.0.12.Final}
2017-07-19 01:35:28.123 INFO 8644 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2017-07-19 01:35:28.180 INFO 8644 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2017-07-19 01:35:28.219 INFO 8644 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2017-07-19 01:35:28.321 INFO 8644 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2017-07-19 01:35:28.742 INFO 8644 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
2017-07-19 01:35:28.757 INFO 8644 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-07-19 01:35:28.809 INFO 8644 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2017-07-19 01:35:29.119 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#37574691: startup date [Wed Jul 19 01:35:25 CEST 2017]; root of context hierarchy
2017-07-19 01:35:29.203 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String com.example.springBootTest00.controllers.IndexController.index()
2017-07-19 01:35:29.205 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/product],methods=[POST]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.saveOrUpdateProduct(com.example.springBootTest00.domain.Product)
2017-07-19 01:35:29.206 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/product/edit/{id}]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.edit(java.lang.Integer,org.springframework.ui.Model)
2017-07-19 01:35:29.206 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/product/new]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.newProduct(org.springframework.ui.Model)
2017-07-19 01:35:29.206 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/product/delete/{id}]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.deleteProduct(java.lang.Integer,org.springframework.ui.Model)
2017-07-19 01:35:29.206 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/products]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.listProducts(org.springframework.ui.Model)
2017-07-19 01:35:29.206 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/product/{id}]}" onto public java.lang.String com.example.springBootTest00.controllers.ProductController.getProduct(java.lang.Integer,org.springframework.ui.Model)
2017-07-19 01:35:29.209 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-07-19 01:35:29.209 INFO 8644 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-07-19 01:35:29.243 INFO 8644 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-19 01:35:29.244 INFO 8644 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-19 01:35:29.284 INFO 8644 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-19 01:35:29.920 INFO 8644 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-07-19 01:35:29.983 INFO 8644 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-07-19 01:35:29.987 INFO 8644 --- [ main] c.e.s.SpringBootTest00Application : Started SpringBootTest00Application in 5.052 seconds (JVM running for 5.401)
I have some classes with #Service / #Controller working properly and all the requests are mapped to url strings other than h2-console. Should i import something else in the pom or configure something in application.properties ?

Writing in simple Steps:
In Application.properties file include
spring.h2.console.path=/h2
spring.h2.console.enabled=true
And in pom.xml Include devtools dependency
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
re-package and open http://localhost:[port]/h2 you are all set
other properties you have to include is
spring.datasource.url=jdbc:h2:file:~/h2db
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
the file h2db will store in userprofile folder of windows
for example : C:\Users\[profile]