I am trying to migrate jenkins from one machine to another machine by 
copying the complete jenkins folder. It works fine for 1.6xx but it is not 
working for any of the 1.5xx version. 
Error I can see on the jenkins page :

[image: [!]] Error

org.jvnet.hudson.reactor.ReactorException: hudson.util.IOException2: Unable to 
read /var/lib/jenkins/config.xml
        at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:246)
        at jenkins.InitReactorRunner.run(InitReactorRunner.java:43)
        at jenkins.model.Jenkins.executeReactor(Jenkins.java:904)
        at jenkins.model.Jenkins.<init>(Jenkins.java:804)
        at hudson.model.Hudson.<init>(Hudson.java:81)
        at hudson.model.Hudson.<init>(Hudson.java:77)
        at hudson.WebAppMain$2.run(WebAppMain.java:214)
Caused by: hudson.util.IOException2: Unable to read /var/lib/jenkins/config.xml
        at hudson.XmlFile.unmarshal(XmlFile.java:170)
        at jenkins.model.Jenkins$16.run(Jenkins.java:2515)
        at 
org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
        at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
        at jenkins.model.Jenkins$7.runTask(Jenkins.java:893)
        at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
        at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: com.thoughtworks.xstream.converters.ConversionException: Invalid 
reference
---- Debugging information ----
reference           : 
../../../hudson.plugins.nested__view.NestedView/views/listView[4]/jobNames/comparator
class               : java.util.TreeSet
required-type       : java.util.TreeSet
converter-type      : 
com.thoughtworks.xstream.converters.collections.TreeSetConverter
path                : /hudson/views/listView[3]/jobNames/comparator
line number         : 610
class[1]            : hudson.model.ListView
converter-type[1]   : hudson.util.RobustReflectionConverter
class[2]            : java.util.concurrent.CopyOnWriteArrayList
converter-type[2]   : hudson.util.RobustCollectionConverter
class[3]            : hudson.model.Hudson
version             : null
-------------------------------
        at 
com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:57)
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
        at 
com.thoughtworks.xstream.converters.collections.TreeMapConverter.unmarshalComparator(TreeMapConverter.java:115)
        at 
com.thoughtworks.xstream.converters.collections.TreeSetConverter.unmarshal(TreeSetConverter.java:86)
        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 
hudson.util.RobustReflectionConverter.unmarshalField(RobustReflectionConverter.java:333)
        at 
hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:275)
        at 
hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:222)
        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.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71)
        at 
hudson.util.RobustCollectionConverter.populateCollection(RobustCollectionConverter.java:85)
        at 
com.thoughtworks.xstream.converters.collections.CollectionConverter.unmarshal(CollectionConverter.java:61)
        at 
hudson.util.RobustCollectionConverter.unmarshal(RobustCollectionConverter.java:76)
        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 
hudson.util.RobustReflectionConverter.unmarshalField(RobustReflectionConverter.java:333)
        at 
hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:275)
        at 
hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:222)
        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:1061)
        at hudson.util.XStream2.unmarshal(XStream2.java:109)
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1045)
        at hudson.XmlFile.unmarshal(XmlFile.java:166) 

... 9 more

java version on the machine is  

java version "1.7.0_111" . Please suggest.

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