deploy spring boot war into tomcat - spring

Question

i am using spring boot and i want to deploy a rest API war file into tomcat server.
There is no errors in the tomcat server logs but when i call any endpoint i got 404 "not found" and i got the same from the tomcat server .
java version : 8.
tomcat version : 9.
maybe i miss something , here are my code samples :
Pom :
<?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.test</groupId>
<artifactId>test</artifactId>
<version>1.1</version>
<packaging>war</packaging>
<name>test</name>
<description>test API</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.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>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- tag::security[] -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!-- end::security[] -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependencies>
<build>
<defaultGoal>install</defaultGoal>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
<!-- To use the plugin goals in your POM or parent POM -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
2.Application.java
#SpringBootApplication
public class TestApplication extends SpringBootServletInitializer {
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder
application) {
return application.sources(TestApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(TestApplication.class, args);
}
}

Answer 1

Yes I had the similar error, in my case I autowire the object of Spring security session so it shows circular reference error.
I added #Lay annotation on top of the autowired object. For more details pls check the link.
https://www.quora.com/How-can-you-fix-Requested-bean-is-currently-in-creation-Is-there-an-unresolvable-circular-reference-while-deploying-a-Spring-Security-application-in-Tomcat

Answer 2

run your spring boot app in your tomcat server as a ROOT context.
u can do it by change ROOT.war in tomcat server with your spring boot app ( this is a bad way ) or u can configure it.

Answer 3

I fixed similar issue. There is no error but some warning when you try open web page. Probably you can take "Warning: No mapping found".
You dont need to SpringBootServletInitializer and override metode in application class. Spring boot is developed for autoconfiguration. Your html or jsp page should be in resources/template or resources/static folder. Please peruse Serving Web Content with Spring MVC , this page can be help you.