同一问题的原因可能存在多种，这里的方式仅供参考
1、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。
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