Spring boot war file deploy on Tomcat

Question

I use Spring Boot 1.2.4.RELEASE with gs-rest-service source file. I got:

127.0.0.1 - - [18/Jun/2015:09:59:25 +0300] "GET /gs-rest-service-0.1.0/ HTTP/1.1" 404 1021

There are no other exceptions in Tomcat logs.

I have read related questions, but my test doesn't run. Spring Boot War deployed to Tomcat

I have read howto-create-a-deployable-war and Packaging executable jar and war files.

Maybe I miss something.

My source:

1.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>org.springframework</groupId>
    <artifactId>gs-rest-service</artifactId>
    <version>0.1.0</version>
    <packaging>war</packaging>

    <properties>        
        <start-class>hello.Application</start-class>
        <java.version>1.8</java.version>
    </properties>


    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.4.RELEASE</version>
    </parent>

    <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>        
    </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>
                <version>2.3.2</version>
                <configuration>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>
</project>

2.Application.java

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

@SpringBootApplication
public class Application extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Files Greeting.java and GreetingController.java are not changed.

Answer 1

Just tried this here, and could reproduce the exact same behaviour.

As silly as it sounds, most likely you are running your external tomcat under a Java 1.7 JRE (speculation), while having compiled your code against 1.8 (we know this from your pom).

Strangely, there is no error, and the app appears in the manager app, but then you get a 404 when you're trying to access it.

One way to confirm this is to look at your tomcat log output. Do you see the Spring Boot banner? Probably not.