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java.lang.NullPointerException at java.lang.String$CaseInsensitiveComparator.compare(String.java:1177) at java.lang.String$CaseInsensitiveComparator.compare(String.java:1170) at java.lang.String.compareToIgnoreCase(String.java:1220) at hudson.util.CaseInsensitiveComparator.compare(CaseInsensitiveComparator.java:40) at hudson.util.CaseInsensitiveComparator.compare(CaseInsensitiveComparator.java:34) at jenkins.model.IdStrategy$CaseInsensitive.compare(IdStrategy.java:160) at jenkins.model.IdStrategy.equals(IdStrategy.java:78) at hudson.model.User.getOrCreate(User.java:393) at hudson.model.User.getAll(User.java:475) at hudson.model.User$FullNameIdResolver.resolveCanonicalId(User.java:903) at hudson.model.User.get(User.java:358) at hudson.model.User.get(User.java:331) at hudson.security.HudsonPrivateSecurityRealm.loadUserByUsername(HudsonPrivateSecurityRealm.java:165) at hudson.security.HudsonPrivateSecurityRealm.authenticate(HudsonPrivateSecurityRealm.java:176) at hudson.security.HudsonPrivateSecurityRealm.authenticate(HudsonPrivateSecurityRealm.java:94) at hudson.security.AbstractPasswordBasedSecurityRealm.doAuthenticate(AbstractPasswordBasedSecurityRealm.java:114) at hudson.security.AbstractPasswordBasedSecurityRealm.access$100(AbstractPasswordBasedSecurityRealm.java:39) at hudson.security.AbstractPasswordBasedSecurityRealm$Authenticator.retrieveUser(AbstractPasswordBasedSecurityRealm.java:148) 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:86) 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$1.doFilter(ChainedServletFilter.java:87) at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482) at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46) 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: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$1.run(BoundedExecutorService.java:77) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)