This is a duplicate issue, already a post open. 

On Tuesday, May 12, 2020 at 5:45:33 AM UTC+2, Mai Waly wrote:
>
> Hi All,
>
>
>
> Please advise what happen as Jenkins is no longer starting and showing 
> error, there is no gui any more. 
>
>
> ay 10, 2020 7:48:13 AM hudson.util.BootFailure publish
> SEVERE: Failed to initialize Jenkins
> hudson.util.HudsonFailedToLoad: org.jvnet.hudson.reactor.ReactorException: 
> java.io.IOException: Unable to read /jenkins/config.xml
>         at hudson.WebAppMain$3.run(WebAppMain.java:244)
> Caused by: org.jvnet.hudson.reactor.ReactorException: java.io.IOException: 
> Unable to read /jenkins/config.xml
>         at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:269)
>         at jenkins.InitReactorRunner.run(InitReactorRunner.java:45)
>         at jenkins.model.Jenkins.executeReactor(Jenkins.java:1009)
>         at jenkins.model.Jenkins.<init>(Jenkins.java:877)
>         at hudson.model.Hudson.<init>(Hudson.java:85)
>         at hudson.model.Hudson.<init>(Hudson.java:81)
>         at hudson.WebAppMain$3.run(WebAppMain.java:227)
> Caused by: java.io.IOException: Unable to read /jenkins/config.xml
>         at hudson.XmlFile.unmarshal(XmlFile.java:165)
>         at jenkins.model.Jenkins.loadConfig(Jenkins.java:2785)
>         at jenkins.model.Jenkins.access$700(Jenkins.java:324)
>         at jenkins.model.Jenkins$16.run(Jenkins.java:2803)
>         at 
> org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
>         at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
>         at jenkins.model.Jenkins$7.runTask(Jenkins.java:998)
>         at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
>         at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
>         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 by: jenkins.util.xstream.CriticalXStreamException: 
> hudson.security.ProjectMatrixAuthorizationStrategy : 
> hudson.security.ProjectMatrixAuthorizationStrategy
> ---- Debugging information ----
> message             : hudson.security.ProjectMatrixAuthorizationStrategy
> cause-exception     : 
> com.thoughtworks.xstream.mapper.CannotResolveClassException
> cause-message       : hudson.security.ProjectMatrixAuthorizationStrategy
> class               : hudson.model.Hudson
> required-type       : hudson.model.Hudson
> converter-type      : hudson.util.RobustReflectionConverter
> path                : /hudson/authorizationStrategy
> line number         : 8
> version             : not available
>
>
>
> Permission checked
> Disk space is Ok
>
> All what i see is that plugins folder is missing. Jpi files and the plugin 
> folders are there
>
> Like there is a folder for matrix-project and matrix-auth but no jpi files.
>
> Please help.
>
> Thanks,
> Mai
>

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