Critical Everytime I try to configure jenkins as a windows service, I get the following error:
javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Pointer at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876) at org.kohsuke.stapler.MetaClass$13.dispatch(MetaClass.java:411) at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649) at org.kohsuke.stapler.Stapler.service(Stapler.java:238) at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132) at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:123) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84) at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:370) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Pointer at com.sun.jna.PointerType.<init>(PointerType.java:25) at com.sun.jna.ptr.ByReference.<init>(ByReference.java:30) at com.sun.jna.ptr.IntByReference.<init>(IntByReference.java:22) at com.sun.jna.ptr.IntByReference.<init>(IntByReference.java:18) at hudson.util.jna.RegistryKey.open(RegistryKey.java:222) at hudson.util.jna.RegistryKey.openReadonly(RegistryKey.java:218) at hudson.util.jna.DotNet.isInstalled(DotNet.java:50) at hudson.lifecycle.WindowsInstallerLink.doDoInstall(WindowsInstallerLink.java:114) 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 org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298) at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161) at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96) at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:121) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53) at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746) ... 47 more
[JENKINS-30211] Installation error: Could not initialize class com.sun.jna.Pointer
Marko Zivanovic
added a comment - The problem appears to be caused by a lack of permissions. I encountered the same issue and starting browser (Firefox) as administrator allowed the installation to proceed.
Marko Zivanovic
added a comment - The problem appears to be caused by a lack of permissions. I encountered the same issue and starting browser (Firefox) as administrator allowed the installation to proceed. 
Michael Sanders
added a comment - I'm having this issue happen at the moment. I created a new VPS running Windows 10 2016, and the only user is the Administrator user.
Using said Administrator user, launching the jnlp results in a successful connection. However, installing the service results in the error from the original post. Additionally, the Jenkins master logs states the same things in the problem.txt attachment from Marko Zivanovic.
Michael Sanders
added a comment - I'm having this issue happen at the moment. I created a new VPS running Windows 10 2016, and the only user is the Administrator user.
Using said Administrator user, launching the jnlp results in a successful connection. However, installing the service results in the error from the original post. Additionally, the Jenkins master logs states the same things in the problem.txt attachment from Marko Zivanovic. 
chin ho
added a comment - I had the same issue and I was able to fix it by running jenkins like this (in elevated CMD window):
java "-Djna.nosys=true" -jar jenkins.war
then Jenkins was able to install as a service.
Also I added that system property to the jenkins.xml file like this:
<arguments>-Xrs -Xmx1536m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -Djna.nosys=true -jar "%BASE%\jenkins.war" --httpPort=8080 --webroot="%BASE%\war"</arguments>
chin ho
added a comment - I had the same issue and I was able to fix it by running jenkins like this (in elevated CMD window):
java "-Djna.nosys=true" -jar jenkins.war
then Jenkins was able to install as a service.
Also I added that system property to the jenkins.xml file like this:
<arguments>-Xrs -Xmx1536m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -Djna.nosys=true -jar "%BASE%\jenkins.war" --httpPort=8080 --webroot="%BASE%\war"</arguments> 
Attaching possible cause.