I installed some plugins in my Jenkins and after install, I seems below Exceptions. and currently, I am not able to use Jenkins.
 
 
java.lang.IllegalArgumentException: org.apache.commons.lang3 at java.lang.ClassLoader.definePackage(ClassLoader.java:1594) at jenkins.util.AntClassLoader.definePackage(AntClassLoader.java:1300) at jenkins.util.AntClassLoader.definePackage(AntClassLoader.java:1189) at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1149) at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:718) at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1330) at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1382) at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1347) at jenkins.ClassLoaderReflectionToolkit._findClass(ClassLoaderReflectionToolkit.java:107) at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:637) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at jenkins.util.AntClassLoader.findBaseClass(AntClassLoader.java:1411) at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1089) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.jenkinsci.plugins.github_branch_source.GitHubSCMNavigator.setApiUri(GitHubSCMNavigator.java:265) at org.jenkinsci.plugins.github_branch_source.GitHubSCMNavigator$DescriptorImpl.newInstance(GitHubSCMNavigator.java:1435) at jenkins.branch.CustomOrganizationFolderDescriptor.doAddSpecificDescriptors(CustomOrganizationFolderDescriptor.java:172) at jenkins.branch.CustomOrganizationFolderDescriptor.addSpecificDescriptors(CustomOrganizationFolderDescriptor.java:136) Caused: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:104) Caused: java.lang.Error at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:110) at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:175) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296) at jenkins.model.Jenkins$5.runTask(Jenkins.java:1129) at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214) at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:68) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused: org.jvnet.hudson.reactor.ReactorException at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:282) at jenkins.InitReactorRunner.run(InitReactorRunner.java:49) at jenkins.model.Jenkins.executeReactor(Jenkins.java:1162) at jenkins.model.Jenkins.<init>(Jenkins.java:960) at hudson.model.Hudson.<init>(Hudson.java:85) at hudson.model.Hudson.<init>(Hudson.java:81) at hudson.WebAppMain$3.run(WebAppMain.java:295) Caused: hudson.util.HudsonFailedToLoad at hudson.WebAppMain$3.run(WebAppMain.java:312)