问题
同一问题的原因可能存在多种，这里的方式仅供参考
描述：使用jenkins打包基于springboot的多web模块项目时出现Unable to find main class
15:05:33 [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.3.RELEASE:repackage (default) on project plat-cabinet: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.3.RELEASE:repackage failed: Unable to find main class -> [Help 1] 15:05:33 org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.3.RELEASE:repackage (default) on project plat-cabinet: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.3.RELEASE:repackage failed: Unable to find main class 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) 15:05:33 at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) 15:05:33 at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) 15:05:33 at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957) 15:05:33 at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289) 15:05:33 at org.apache.maven.cli.MavenCli.main (MavenCli.java:193) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) 15:05:33 at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) 15:05:33 at java.lang.reflect.Method.invoke (Method.java:498) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347) 15:05:33 Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.3.RELEASE:repackage failed: Unable to find main class 15:05:33 at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) 15:05:33 at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) 15:05:33 at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) 15:05:33 at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957) 15:05:33 at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289) 15:05:33 at org.apache.maven.cli.MavenCli.main (MavenCli.java:193) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) 15:05:33 at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) 15:05:33 at java.lang.reflect.Method.invoke (Method.java:498) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347) 15:05:33 Caused by: java.lang.IllegalStateException: Unable to find main class 15:05:33 at org.springframework.boot.loader.tools.Repackager.buildManifest (Repackager.java:354) 15:05:33 at org.springframework.boot.loader.tools.Repackager.repackage (Repackager.java:273) 15:05:33 at org.springframework.boot.loader.tools.Repackager.repackage (Repackager.java:258) 15:05:33 at org.springframework.boot.loader.tools.Repackager.repackage (Repackager.java:190) 15:05:33 at org.springframework.boot.maven.RepackageMojo.repackage (RepackageMojo.java:212) 15:05:33 at org.springframework.boot.maven.RepackageMojo.execute (RepackageMojo.java:199) 15:05:33 at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156) 15:05:33 at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) 15:05:33 at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) 15:05:33 at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) 15:05:33 at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) 15:05:33 at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) 15:05:33 at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957) 15:05:33 at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289) 15:05:33 at org.apache.maven.cli.MavenCli.main (MavenCli.java:193) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) 15:05:33 at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) 15:05:33 at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) 15:05:33 at java.lang.reflect.Method.invoke (Method.java:498) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406) 15:05:33 at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
解决方式
在项目的根目录下直接使用maven命令执行构建打包（开发环境和测试环境），发现有这个差异：
[WARNING] The POM for xxx.xxx.xxx:arcface:jar:1.0.0 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
开发环境一直以来都打包正常，对比发现没有如上信息，抱着试一试的心态，在测试环境的仓库中把对应的jar信息删除后重新执行构建打包，最终打包成功。
