Hello 

We don't get any information about new versions of jenkins or plugins on 
the "Manage Jenkins" page. The only error I got in the log is this one:

> Failed to load 
> hudson.plugins.release.dashboard.RecentReleasesPortlet$DescriptorImpl 
> java.lang.LinkageError: Failed to resolve class 
> hudson.plugins.release.dashboard.RecentReleasesPortlet$DescriptorImpl at 
> hudson.ExtensionFinder$GuiceFinder$SezpozModule.resolve(ExtensionFinder.java:491)
>  
> at 
> hudson.ExtensionFinder$GuiceFinder$SezpozModule.configure(ExtensionFinder.java:524)
>  
> at com.google.inject.AbstractModule.configure(AbstractModule.java:62) at 
> com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:230) 
> at com.google.inject.spi.Elements.getElements(Elements.java:103) at 
> com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:136)
>  
> at 
> com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:104)
>  
> at com.google.inject.Guice.createInjector(Guice.java:96) at 
> com.google.inject.Guice.createInjector(Guice.java:73) at 
> hudson.ExtensionFinder$GuiceFinder.(ExtensionFinder.java:282) at 
> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at 
> sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at 
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
> at java.lang.reflect.Constructor.newInstance(Unknown Source) at 
> java.lang.Class.newInstance(Unknown Source) at 
> net.java.sezpoz.IndexItem.instance(IndexItem.java:181) at 
> hudson.ExtensionFinder$Sezpoz._find(ExtensionFinder.java:642) at 
> hudson.ExtensionFinder$Sezpoz.find(ExtensionFinder.java:617) at 
> hudson.ExtensionFinder._find(ExtensionFinder.java:151) at 
> hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:316) 
> at hudson.ExtensionList.load(ExtensionList.java:295) at 
> hudson.ExtensionList.ensureLoaded(ExtensionList.java:248) at 
> hudson.ExtensionList.iterator(ExtensionList.java:138) at 
> hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:309) 
> at hudson.ExtensionList.load(ExtensionList.java:295) at 
> hudson.ExtensionList.ensureLoaded(ExtensionList.java:248) at 
> hudson.ExtensionList.get(ExtensionList.java:153) at 
> hudson.PluginManager$PluginUpdateMonitor.getInstance(PluginManager.java:1109) 
> at hudson.maven.PluginImpl.init(PluginImpl.java:54) at 
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
> sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at 
> java.lang.reflect.Method.invoke(Unknown Source) at 
> hudson.init.InitializerFinder.invoke(InitializerFinder.java:120) at 
> hudson.init.InitializerFinder$TaskImpl.run(InitializerFinder.java:184) at 
> org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259) at 
> jenkins.model.Jenkins$7.runTask(Jenkins.java:899) 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(Unknown Source) at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at 
> java.lang.Thread.run(Unknown Source) Caused by: 
> java.lang.TypeNotPresentException: Type 
> hudson.plugins.view.dashboard.DashboardPortlet not present at 
> sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(Unknown 
> Source) at 
> sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown 
> Source) at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown 
> Source) at sun.reflect.generics.visitor.Reifier.reifyTypeArguments(Unknown 
> Source) at 
> sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown 
> Source) at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown 
> Source) at 
> sun.reflect.generics.repository.ClassRepository.getSuperclass(Unknown 
> Source) at java.lang.Class.getGenericSuperclass(Unknown Source) at 
> hudson.ExtensionFinder$GuiceFinder$SezpozModule.resolve(ExtensionFinder.java:478)
>  
> ... 41 more Caused by: java.lang.ClassNotFoundException: 
> hudson.plugins.view.dashboard.DashboardPortlet at 
> org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1365)
>  
> at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1315) 
> at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068) 
> at java.lang.ClassLoader.loadClass(Unknown Source) at 
> java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown 
> Source) ... 50 more  
>

We made no changes on the network or firewall, the server has connection to 
the internet.

Has anyone an idea what the problem is?

Kind regards
Tom

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