java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native
 at com.sun.jna.Structure.setAlignType(Structure.java:280)
 at com.sun.jna.Structure.<init>(Structure.java:197)
 at com.sun.jna.Structure.<init>(Structure.java:193)
 at com.sun.jna.Structure.<init>(Structure.java:180)
 at com.sun.jna.Structure.<init>(Structure.java:172)
 at org.jvnet.libpam.impl.PAMLibrary$pam_conv.<init>(PAMLibrary.java:117)
 at org.jvnet.libpam.PAM.<init>(PAM.java:77)
 at hudson.security.PAMSecurityRealm.authenticate(PAMSecurityRealm.java:81)
 at hudson.security.AbstractPasswordBasedSecurityRealm.doAuthenticate(AbstractPasswordBasedSecurityRealm.java:72)
 at hudson.security.AbstractPasswordBasedSecurityRealm.access$000(AbstractPasswordBasedSecurityRealm.java:31)
 at hudson.security.AbstractPasswordBasedSecurityRealm$Authenticator.retrieveUser(AbstractPasswordBasedSecurityRealm.java:106)
 at org.acegisecurity.providers.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:122)
 at org.acegisecurity.providers.ProviderManager.doAuthentication(ProviderManager.java:200)
 at org.acegisecurity.AbstractAuthenticationManager.authenticate(AbstractAuthenticationManager.java:47)
 at org.acegisecurity.ui.webapp.AuthenticationProcessingFilter.attemptAuthentication(AuthenticationProcessingFilter.java:74)
 at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:252)
 at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
 at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
 at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
 at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
 at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
 at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
 at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)
 at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
 at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
 at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
 at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
 at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
 at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
 at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
 at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
 at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
 at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
 at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:512)
 at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
 at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
 at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1592)
 at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
 at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1296)
 at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
 at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
 at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1562)
 at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
 at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1211)
 at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
 at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
 at org.eclipse.jetty.server.Server.handle(Server.java:500)
 at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:386)
 at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:562)
 at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:378)
 at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
 at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
 at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
 at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
 at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
 at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
 at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
 at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
 at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)
 at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
 at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
 at java.lang.Thread.run(Thread.java:748)