我正在使用jenkins 2.138.1。并且我在“管理插件”部分中更新了role-based strategy，并尝试使用jenkinsurl/restart重新启动实例。它抛出以下错误，现在看不到登录屏幕：
com.thoughtworks.xstream.mapper.CannotResolveClassException: com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategyat com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:79)atcom.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:55)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:79)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:74)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.SecurityMapper.realClass(SecurityMapper.java:71)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at hudson.util.XStream2$CompatibilityMapper.realClass(XStream2.java:379)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at org.jenkinsci.jruby.JRubyMapper.realClass(JRubyMapper.java:34)
at hudson.util.xstream.MapperDelegate.realClass(MapperDelegate.java:43)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:48)
at hudson.util.RobustReflectionConverter.determineType(RobustReflectionConverter.java:461)
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:327)
Caused: jenkins.util.xstream.CriticalXStreamException: com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy : com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy
---- Debugging information ----
message : com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message : com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy
class : hudson.model.Hudson
required-type : hudson.model.Hudson
converter-type : hudson.util.RobustReflectionConverter
path : /hudson/authorizationStrategy
line number : 11
version : not available
-------------------------------
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:356)
at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:270)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1189)
at hudson.util.XStream2.unmarshal(XStream2.java:161)
at hudson.util.XStream2.unmarshal(XStream2.java:132)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1173)
at hudson.XmlFile.unmarshal(XmlFile.java:178)
Caused: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
at hudson.XmlFile.unmarshal(XmlFile.java:181)
at hudson.XmlFile.unmarshal(XmlFile.java:161)
at jenkins.model.Jenkins.loadConfig(Jenkins.java:3005)
at jenkins.model.Jenkins.access$1300(Jenkins.java:304)
at jenkins.model.Jenkins$13.run(Jenkins.java:3104)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:1066)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused: org.jvnet.hudson.reactor.ReactorException
at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:282)
at jenkins.InitReactorRunner.run(InitReactorRunner.java:48)
at jenkins.model.Jenkins.executeReactor(Jenkins.java:1100)
at jenkins.model.Jenkins.<init>(Jenkins.java:904)
at hudson.model.Hudson.<init>(Hudson.java:85)
at hudson.model.Hudson.<init>(Hudson.java:81)
at hudson.WebAppMain$3.run(WebAppMain.java:233)
Caused: hudson.util.HudsonFailedToLoad
at hudson.WebAppMain$3.run(WebAppMain.java:250)
答案 0 :(得分：0)
遇到了同样的问题，可以通过以下方式解决：
我关闭了詹金斯网址，因为它可以使用，但每个人都可以成为管理员
备份config.xml，因为它将被清空。
在$JENKINS_HOME/config.xml中注释掉/删除了所有authorizationStrategy块，并将<useSecurity>true</useSecurity>更改为false。
启动jenkins（它正常启动但没有身份验证。
将config.xml更改为先前的原始版本（包括先前运行的所有安全性），并使用适当的原始角色策略配置正常进行工作。
答案 1 :(得分：0)
我今天遇到此错误，就我而言，这是一个依赖关系问题，Role-based Authorization Strategy已更新至v3.0，并且我使用Ansible jenkins_job module更新了插件，并且Jenkins重新启动后失败。 来自浏览器的错误与此类似，我从服务器收到了此错误：
2020-06-10 20:02:24.483+0000 [id=29] SEVERE jenkins.InitReactorRunner$1#onTaskFailed: Failed Loading plugin Role-based Authorization Strategy v3.0 (role-strategy)
java.io.IOException: Failed to load: Role-based Authorization Strategy (3.0)
- Plugin is missing: extended-read-permission (3.2)
at hudson.PluginWrapper.resolvePluginDependencies(PluginWrapper.java:933)
at hudson.PluginManager$2$1$1.run(PluginManager.java:546)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:1133)
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$1.run(ImpersonatingExecutorService.java:59)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
如您所见，有一个待处理的插件，看来Ansible可以根据需要从依赖项更新插件，但不能安装较新的依赖项。
设置类似的解决方案后，备份config.xml，删除安全性，安装依赖项Extended Read Permission，然后恢复配置，我就可以恢复服务。
答案 2 :(得分：-1)
检查/ var / lib / jenkins的所有权。 确保所有者是詹金斯。
chown -R jenkins:jenkins /var/lib/jenkins
这解决了我的问题。