今天在打包项目的时候，突然打包报错堆栈如下：开始以为是maven插件的问题，
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 48.491 s
[INFO] Finished at: 2019-03-21T15:33:31+08:00
[INFO] Final Memory: 57M/495M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on project yqdataservice-core-model: Failed to clean project: Failed to delete /home/admin/build/app/core/model/target/classes/META-INF/spring -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on project yqdataservice-core-model: Failed to clean project: Failed to delete /home/admin/build/app/core/model/target/classes/META-INF/spring
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failed to clean project: Failed to delete /home/admin/build/app/core/model/target/classes/META-INF/spring
at org.apache.maven.plugin.clean.CleanMojo.execute(CleanMojo.java:215)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
... 19 more
Caused by: java.io.IOException: Failed to delete /home/admin/build/app/core/model/target/classes/META-INF/spring
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:249)
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:191)
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:158)
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:158)
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:158)
at org.apache.maven.plugin.clean.Cleaner.delete(Cleaner.java:117)
at org.apache.maven.plugin.clean.CleanMojo.execute(CleanMojo.java:193)
... 21 more
原因是因为之前编译的工程还在运行，无法clean，导致maven生命周期无法继续进行。
解决办法1：直接停止服务，在启动编译。
如果以上办法不行：有可能工具里面已经停止服务了，但是后台进程里面还没关闭。
解决办法：直接kill了java服务进程。然后在启动编译
如果以上还是无法解决，检查下pom.xml文件的依赖。例如是分布式项目，有服务a,b,c，有可能出现循环依赖，就报错了。
a依赖b，b依赖c，c又依赖a。编译的时候就会被占用导致编译报错