Why am I getting ClassCastException in Jenkins build

Question

I am new to Jenkins. I am getting the following error. Please help

FATAL: hudson.scm.SCMRevisionState$None cannot be cast to hudson.scm.SVNRevisionState
java.lang.ClassCastException: hudson.scm.SCMRevisionState$None cannot be cast to hudson.scm.SVNRevisionState
    at hudson.scm.SubversionSCM.calcChangeLog(SubversionSCM.java:730)
    at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:865)
    at hudson.scm.SCM.checkout(SCM.java:496)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1278)
    at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:604)
    at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
    at hudson.model.Run.execute(Run.java:1728)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:405)

Answer 1

如果您尝试结帐 SVN Repo，请安装 svn 插件