SpringBoot – making jar files – No auto configuration classes found in META-INF/spring.factories

I had the same problem and just solved it.

At first, I was generating the fat jar with the maven-assembly-plugin, which created a file called mavenproject1-0.0.1-SNAPSHOT-jar-with-dependencies.jar. This file gave the same problem as you mentioned when I tried running it.

I think that because it’s a Spring Boot application, you need to use their plug-in. I changed my packaging to the spring-boot-maven-plugin and it generates two files: mavenproject1-0.0.1-SNAPSHOT.jar and mavenproject1-0.0.1-SNAPSHOT.jar.original. Just try java -jar target/mavenproject1-0.0.1-SNAPSHOT.jar, and it will hopefully work. 🙂

For reference, here is my 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.company</groupId>
    <artifactId>mavenproject1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
        <relativePath/>
        <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <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</artifactId>
        </dependency>
        <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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.company.common</groupId>
            <artifactId>common-files</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies> 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                    <mainClass>${start-class}</mainClass>
                </configuration>
                  <executions>
                    <execution>
                      <goals>
                        <goal>repackage</goal>
                      </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
              <artifactId>maven-assembly-plugin</artifactId>
              <version>2.2-beta-5</version>
              <configuration>
                <archive>
                  <manifest>
                    <addClasspath>true</addClasspath>
                    <mainClass>com.company.mavenproject1.MainClass</mainClass>
                  </manifest>
                </archive>
                <descriptorRefs>
                  <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
              </configuration>
              <executions>
                <execution>
                  <id>assemble-all</id>
                  <phase>package</phase>
                  <goals>
                    <goal>single</goal>
                  </goals>
                </execution>
              </executions>
            </plugin>
        </plugins>
    </build>
</project>

This is the solution :

1. add only plugin in POM.xml

   <build>
   <plugins>
      <plugin>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-maven-plugin</artifactId>
           <configuration>
               <fork>true</fork>
               <mainClass>${start-class}</mainClass>
           </configuration>
             <executions>
               <execution>
                 <goals>
                   <goal>repackage</goal>
                 </goals>
               </execution>
           </executions>
       </plugin>
   </plugins>
   

2. One property in pom.xml

   <properties>
     <start-class>com.xxx.yyy.MainClass</start-class>
   </properties>
   

3. Run command

   mvn clean package spring-boot:repackage
   

4. Now run your jar (it includes all dependencies now) created inside target folder

   java -jar my-service-0.0.1-SNAPSHOT.jar
   

Alternatively, if you cannot use the spring boot plugin for whatever reason, you can include the following file in your application. It should be called src/main/resources/META-INF/spring.factories:

https://github.com/spring-projects/spring-boot/blob/1.5.x/spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories

This will work for spring boot 1.x and is helpful if you want to use spring managed beans in a REPL.

This configuration works for me. I execute my JAR as a service but the line is:

javaw -jar MY_JAR.jar

POM:

<properties>
        <!-- Spring boot main class -->
        <start-class>com.PATH_TO_MAIN.Main</start-class>
</properties>
...
<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
</plugin>

With Spring Boot, it is no longer necessary to use the assembly-plugin. Do not forget to call the package goal.

Here is the documentation example.