Our team that set up our Jenkins server is long gone. I do not have much experience. The installed Jenkins version is 2.285.
I attempted to update the NodeJS plugin via the Jenkins UI as the NodeJS plugin seemed to be casing a build error in one of our packages. It looks like I made a mistake. It appears that I selected to update all plugins.
When jenkins restarted the main page had the following error;
(I will include the stack at the end after I explain what things I have done to try and fix this)
-I tried to update the jenkins version to a later version using apt-get install command. Did not fix the issue
-The error message indicates an issue with the github-oauth plugin so I tried moving any plugins with the name git* to a back up directory and then restart jenkins. This did not fix the problem
-I changed change the class attribute of the securityRealm tag from org.jenkinsci.plugins.GithubSecurityRealm to hudson.security.HudsonPrivateSecurityRealm in the config.xml file and restarted jenkins. Jenkins restarted and I could login but I had to make a new user as we use the git plugins for our user account logins. I could not fix the git plugins from this state.
How can I fix this issue without messing up our configuration?
com.thoughtworks.xstream.mapper.CannotResolveClassException: org.jenkinsci.plugins.GithubSecurityRealm
at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:81)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:55)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:79)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:74)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.SecurityMapper.realClass(SecurityMapper.java:71)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at hudson.util.XStream2$CompatibilityMapper.realClass(XStream2.java:378)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at org.jenkinsci.jruby.JRubyMapper.realClass(JRubyMapper.java:34)
at hudson.util.xstream.MapperDelegate.realClass(MapperDelegate.java:45)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125)
at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:47)
at hudson.util.RobustReflectionConverter.determineType(RobustReflectionConverter.java:507)
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:337)
Caused: jenkins.util.xstream.CriticalXStreamException:
---- Debugging information ----
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message : org.jenkinsci.plugins.GithubSecurityRealm
class : hudson.model.Hudson
required-type : hudson.model.Hudson
converter-type : hudson.util.RobustReflectionConverter
path : /hudson/securityRealm
line number : 105
version : not available
-------------------------------
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:366)
at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:280)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
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:1429)
at hudson.util.XStream2.unmarshal(XStream2.java:161)
at hudson.util.XStream2.unmarshal(XStream2.java:132)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1409)
at hudson.XmlFile.unmarshal(XmlFile.java:180)
Caused: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
at hudson.XmlFile.unmarshal(XmlFile.java:183)
at hudson.XmlFile.unmarshal(XmlFile.java:163)
at jenkins.model.Jenkins.loadConfig(Jenkins.java:3160)
at jenkins.model.Jenkins.access$1200(Jenkins.java:313)
at jenkins.model.Jenkins$12.run(Jenkins.java:3261)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
at jenkins.model.Jenkins$5.runTask(Jenkins.java: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$1.run(ImpersonatingExecutorService.java:68)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$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: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)