maven - spring roo更新maven配置错误

Question

我正在运行 springsource 工具套件 2.9.1。在我签入一个 spring roo 项目后，该项目无法识别它是一个动态 Web 项目，当我尝试更新 maven 配置时，它给出了这个错误

!MESSAGE An internal error occurred during: "Updating Maven Configuration".
!STACK 0
java.lang.NullPointerException
    at com.springsource.sts.roo.ui.internal.maven.RooProjectConfigurator.doConfigure(RooProjectConfigurator.java:56)
    at com.springsource.sts.maven.AbstractSpringProjectConfigurator.configure(AbstractSpringProjectConfigurator.java:36)
    at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:72)
    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:302)
    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:277)
    at org.eclipse.m2e.core.ui.internal.UpdateConfigurationJob.runInWorkspace(UpdateConfigurationJob.java:87)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

有什么想法吗？