现象
使用Jenkins 2.8，当我运行一个简单的Jenkins工作时，构建一个job获取源代码，出现下面的错误
FATAL: jenkins/scm/RunWithSCM
java.lang.NoClassDefFoundError: jenkins@H_403_7@/scm/RunWithSCM
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:@H_403_7@763@H_403_7@)
at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:@H_403_7@1139@H_403_7@)
at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:@H_403_7@878@H_403_7@)
at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:@H_403_7@1310@H_403_7@)
at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:@H_403_7@1366@H_403_7@)
at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:@H_403_7@1326@H_403_7@)
at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:@H_403_7@1079@H_403_7@)
at java.lang.ClassLoader.loadClass(ClassLoader.java:@H_403_7@357@H_403_7@)
at org.jenkinsci.plugins.workflow.job.WorkflowJob$SCMListenerImpl.onCheckout(WorkflowJob.java:@H_403_7@629@H_403_7@)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:@H_403_7@609@H_403_7@)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:@H_403_7@86@H_403_7@)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:@H_403_7@529@H_403_7@)
at hudson.model.Run.execute(Run.java:@H_403_7@1741@H_403_7@)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:@H_403_7@43@H_403_7@)
at hudson.model.ResourceController.execute(ResourceController.java:@H_403_7@98@H_403_7@)
at hudson.model.Executor.run(Executor.java:@H_403_7@410@H_403_7@)
Caused by: java.lang.ClassNotFoundException: jenkins.scm.RunWithSCM
at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:@H_403_7@1376@H_403_7@)
... @H_403_7@17@H_403_7@ more
Finished: FAILURE@H_403_7@
原因：
由于Jenkins下载插件不全导致，插件下载不全由于网络原因所致（公司可能屏蔽了Jenkins原来的镜像地址，导致下载不全）
解决方案：
可供选择的jenkins2 插件镜像列表：
Jenkins 所有镜像列表： http://mirrors.jenkins-ci.org/status.html
比如日本的镜像： http://mirror.esuni.jp/jenkins/,http://ftp.yz.yamagata-u.ac.jp/pub/misc/jenkins/， http://ftp.tsukuba.wide.ad.jp/software/jenkins/
德国的镜像：http://jenkins.mirror.isppower.de/ ， http://mirror.yandex.ru/mirrors/jenkins/
官方的镜像：http://mirrors.jenkins-ci.org/， http://archives.jenkins-ci.org/
清华大学镜像：https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json
更换地址方法
1.进入jenkins系统管理
2.进入插件管理
原文链接：/jenkins/992137.html
