Jenkins抱怨M2_HOME为空

Question

我尝试在Jenkins 1.427上打开maven包的自动工具安装程序，结果在构建日志中显示了以下内容。这就好像它正在读取一些但不是全部的自动安装配置。

Started by user benson
Building remotely on acropolis.basistech.net
FATAL: Null value not allowed as an environment variable: M2_HOME
java.lang.IllegalArgumentException: Null value not allowed as an environment variable: M2_HOME
at hudson.EnvVars.put(EnvVars.java:162)
at hudson.maven.MavenModuleSetBuild.getEnvironment(MavenModuleSetBuild.java:177)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:673)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1193)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:555)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:443)
at hudson.model.Run.run(Run.java:1376)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:479)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:230)

Answer 1

我设置了一个maven的tarball，它缺少toplevel目录，这让Jenkins感到困惑。