问题遇到的现象和发生背景
jenkins+svn执行报错
问题相关代码，请勿粘贴截图
运行结果及报错内容
FATAL: org/apache/commons/digester/Digester
java.lang.ClassNotFoundException: org.apache.commons.digester.Digester
at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1402)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1357)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1112)
at java.lang.ClassLoader.loadClass(Unknown Source)
Caused: java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester
at hudson.scm.SubversionSCM.createChangeLogParser(SubversionSCM.java:1539)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:656)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:85)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:517)
at hudson.model.Run.execute(Run.java:1896)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
at hudson.model.ResourceController.execute(ResourceController.java:101)
at hudson.model.Executor.run(Executor.java:442)
Finished: FAILURE
