Unable to find a single main class from the following candidates [cn.CommunityApplication, cn.xxx.xxx.CommunityApplication]

今天maven打包工程，突然报异常了，真的好奇怪

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.6.RELEASE:repackage (repackage) on project zhishishequ: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.6.RELEASE:repackage failed: Unable to find a single main class from the following candidates [cn.CommunityApplication, cn.xxx.xxx.CommunityApplication] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

意思是：springboot无法找到一个主启动类

工程为：springboot的父子模块工程，common模块为基础支持模块，不需要启动类的。

那打包的时候为什么会到common模块找启动类呢。

挨个翻了下pom文件，原来在一次排查问题时，在父pom里加了个spring-boot-maven-plugin插件]

<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>

这就导致，打包的时候，会在各模块寻找启动类。

经验教训 

1，调试工程时，要考虑全面，仔细验证比较后再提交代码，不要解决一个问题而又引入另一个问题，给自己和他人带来麻烦

2，spring-boot-maven-plugin打包插件不要在父模块添加，哪个子模块需要，哪个再添加