Thanks for spending your time looking at this.   I had a thought that it
would be a lost cause.   I'll have to look over the old images of the
machine and see what I have got.

On Thu, Jun 11, 2015 at 2:26 PM, Daniel Beck <[email protected]> wrote:

> Downgrading to 1.555 from 1.616 is a lot of effort and requires quite a
> bit of Jenkins knowledge due to changed data formats between these
> versions, plugins detached from core, etc.
>
> Your best bet is to restore from backup.
>
> On 11.06.2015, at 15:20, Paul Wilkins <[email protected]> wrote:
>
> > I was required to upgrade our jenkins install to the latest.   Once this
> was done I encountered some unexpected issues which forced me to want to
> restore back to 1.555.
> >
> > This is all running on a windows server 2012 running using Java 7
> although there is an folder for jre1.8.0_45.   This is an old system I
> inherited so I am bit vague on details.
> >
> > I hit the Restore to v1.555 button and all seemed ok.   Once I restarted
> the machine and opened Jenkins I get the following message.
> >
> > If there are anymore details that might help solve this issue please let
> me know.   Thank you.
> >
> >
> > hudson.util.HudsonFailedToLoad:
> org.jvnet.hudson.reactor.ReactorException: java.io.IOException: Unable to
> read D:\Jenkins\config.xml
> >       at hudson.WebAppMain$3.run(WebAppMain.java:234)
> > Caused by: org.jvnet.hudson.reactor.ReactorException:
> java.io.IOException: Unable to read D:\Jenkins\config.xml
> >       at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:269)
> >       at jenkins.InitReactorRunner.run(InitReactorRunner.java:44)
> >       at jenkins.model.Jenkins.executeReactor(Jenkins.java:910)
> >       at jenkins.model.Jenkins.<init>(Jenkins.java:809)
> >       at hudson.model.Hudson.<init>(Hudson.java:82)
> >       at hudson.model.Hudson.<init>(Hudson.java:78)
> >       at hudson.WebAppMain$3.run(WebAppMain.java:222)
> > Caused by: java.io.IOException: Unable to read D:\Jenkins\config.xml
> >       at hudson.XmlFile.unmarshal(XmlFile.java:165)
> >       at jenkins.model.Jenkins$17.run(Jenkins.java:2561)
> >       at
> org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
> >       at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
> >       at jenkins.model.Jenkins$7.runTask(Jenkins.java:899)
> >       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(Unknown
> Source)
> >       at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
> Source)
> >       at java.lang.Thread.run(Unknown Source)
> > Caused by: com.thoughtworks.xstream.converters.ConversionException: -1 :
> -1
> > ---- Debugging information ----
> > message             : -1
> > cause-exception     : java.lang.ArrayIndexOutOfBoundsException
> > cause-message       : -1
> > class               : hudson.model.Hudson
> > required-type       : hudson.model.Hudson
> > converter-type      : hudson.util.RobustReflectionConverter
> > path                : /hudson/disabledAdministrativeMonitors
> > line number         : 3
> > version             : not available
> > -------------------------------
> >       at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:79)
> >       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:1061)
> >       at hudson.util.XStream2.unmarshal(XStream2.java:113)
> >       at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1045)
> >       at hudson.XmlFile.unmarshal(XmlFile.java:163)
> >       ... 9 more
> > Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
> >       at
> com.thoughtworks.xstream.core.util.OrderRetainingMap.entrySet(OrderRetainingMap.java:77)
> >       at java.util.HashMap.putMapEntries(Unknown Source)
> >       at java.util.HashMap.putAll(Unknown Source)
> >       at
> com.thoughtworks.xstream.core.util.OrderRetainingMap.<init>(OrderRetainingMap.java:36)
> >       at
> com.thoughtworks.xstream.converters.reflection.FieldDictionary.buildMap(FieldDictionary.java:135)
> >       at
> com.thoughtworks.xstream.converters.reflection.FieldDictionary.fieldOrNull(FieldDictionary.java:113)
> >       at
> com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.getFieldOrNull(PureJavaReflectionProvider.java:186)
> >       at
> hudson.util.RobustReflectionConverter.fieldDefinedInClass(RobustReflectionConverter.java:344)
> >       at
> hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:283)
> >       at
> hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:228)
> >       at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
> >       ... 18 more
> >
> >
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