title: Getting some error while installing Hudson?
body: <p>After Installing Hudson i got the below error message.</p>
  
  <p>Can anyone help me how to fix the error.</p>
  
  <p>Error: </p>
  
  <pre><code>[!] Error
  
  org.jvnet.hudson.reactor.ReactorException: com.google.common.util.concurrent.UncheckedExecutionException: com.thoughtworks.xstream.mapper.CannotResolveClassException: maven2-moduleset
      at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:246)
      at hudson.model.Hudson.executeReactor(Hudson.java:719)
      at hudson.model.Hudson.&lt;init&gt;(Hudson.java:616)
      at org.eclipse.hudson.init.InitialRunnable.run(InitialRunnable.java:51)
      at java.lang.Thread.run(Thread.java:662)
  Caused by: com.google.common.util.concurrent.UncheckedExecutionException: com.thoughtworks.xstream.mapper.CannotResolveClassException: maven2-moduleset
      at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2263)
      at com.google.common.cache.LocalCache.get(LocalCache.java:4000)
      at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4004)
      at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4874)
      at hudson.model.TopLevelItemsCache.get(TopLevelItemsCache.java:96)
      at hudson.model.LazyTopLevelItem.item(LazyTopLevelItem.java:144)
      at hudson.model.LazyTopLevelItem.hasPermission(LazyTopLevelItem.java:271)
      at hudson.model.Hudson.getItems(Hudson.java:1303)
      at hudson.model.Hudson.getItems(Hudson.java:223)
      at hudson.model.Hudson.getAllItems(Hudson.java:1367)
      at hudson.model.Hudson$12.run(Hudson.java:2481)
      at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
      at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
      at hudson.model.Hudson$4.runTask(Hudson.java:699)
      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$Worker.runTask(ThreadPoolExecutor.java:895)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
      ... 1 more
  Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: maven2-moduleset
      at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:56)
      at com.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.MapperWrapper.realClass(MapperWrapper.java:30)
      at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
      at hudson.util.XStream2$CompatibilityMapper.realClass(XStream2.java:143)
      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.CachingMapper.realClass(CachingMapper.java:47)
      at com.thoughtworks.xstream.core.util.HierarchicalStreams.readClassType(HierarchicalStreams.java:29)
      at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:133)
      at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
      at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1034)
      at hudson.util.XStream2.unmarshal(XStream2.java:76)
      at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1018)
      at com.thoughtworks.xstream.XStream.fromXML(XStream.java:894)
      at hudson.XmlFile.read(XmlFile.java:115)
      at hudson.model.TopLevelItemsCache$1.load(TopLevelItemsCache.java:81)
      at hudson.model.TopLevelItemsCache$1.load(TopLevelItemsCache.java:75)
      at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3599)
      at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2379)
      at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2342)
      at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2257)
      ... 18 more
  </code></pre>
  
  <p>Powered by Hudson Open Source Continuous Integratio</p>
  
  <p>Regards,</p>
  
  <p>Sudhansu</p>