ReportServer Forum

charlie

Member

Registered: 2017-06-06

java.lang.NullPointerException: Cannot invoke method getUsername() on

Hello,

we use LDAP for authentication. Today one of the users tryed to login in RS and got following message:
java.lang.NullPointerException: Cannot invoke method getUsername() on null object
<br>    at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:88)
<br>    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:45)
<br>    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
<br>    at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:32)
<br>    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
<br>    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54)
<br>    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:114)
<br>    at ldap.LdapPAM.authenticate(Script2.groovy:63)
<br>    at net.datenwerke.security.service.authenticator.AuthenticatorServiceImpl.evaluateTokens(AuthenticatorServiceImpl.java:132)
<br>    at net.datenwerke.security.service.authenticator.AuthenticatorServiceImpl.authenticate(AuthenticatorServiceImpl.java:83)
<br>    at net.datenwerke.rs.authenticator.server.LoginHandlerImpl.authenticate(LoginHandlerImpl.java:60)
<br>    at com.google.inject.persist.jpa.JpaLocalTxnInterceptor.invoke(JpaLocalTxnInterceptor.java:66)
<br>    at net.datenwerke.security.service.security.aop.SecurityCheckInterceptor.invoke(SecurityCheckInterceptor.java:109)
<br>    at net.datenwerke.gf.service.gwtstacktrace.CatchStacktraceInterceptor.invoke(CatchStacktraceInterceptor.java:38)
<br>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
<br>    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
<br>    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
<br>    at java.lang.reflect.Method.invoke(Unknown Source)
<br>    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:587)
<br>    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:333)
<br>    at net.datenwerke.security.service.security.aop.SecurityCheckInterceptor.invoke(SecurityCheckInterceptor.java:109)
<br>    at net.datenwerke.gf.service.gwtstacktrace.CatchStacktraceInterceptor.invoke(CatchStacktraceInterceptor.java:38)
<br>    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:303)
<br>    at net.datenwerke.security.service.security.aop.SecurityCheckInterceptor.invoke(SecurityCheckInterceptor.java:109)
<br>    at net.datenwerke.gf.service.gwtstacktrace.CatchStacktraceInterceptor.invoke(CatchStacktraceInterceptor.java:38)
<br>    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:373)
<br>    at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
<br>    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
<br>    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
<br>    at net.datenwerke.security.service.security.aop.SecurityCheckInterceptor.invoke(SecurityCheckInterceptor.java:109)
<br>    at net.datenwerke.gf.service.gwtstacktrace.CatchStacktraceInterceptor.invoke(CatchStacktraceInterceptor.java:38)
<br>    at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263)
<br>    at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178)
<br>    at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
<br>    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62)
<br>    at com.google.inject.persist.PersistFilter.doFilter(PersistFilter.java:89)
<br>    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163)
<br>    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
<br>    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:168)
<br>    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
<br>    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:168)
<br>    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
<br>    at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
<br>    at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
<br>    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
<br>    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
<br>    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
<br>    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
<br>    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
<br>    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
<br>    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
<br>    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
<br>    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
<br>    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
<br>    at org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:877)
<br>    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
<br>    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2508)
<br>    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2497)
<br>    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
<br>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
<br>    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
<br>    at java.lang.Thread.run(Unknown Source)
<br>

the user is AD, nothing has changed for this user in AD. What can we so the user will be able to login in RS?

Best regards

IF_Eduardo

Administrator

Registered: 2016-11-01

Website

Re: java.lang.NullPointerException: Cannot invoke method getUsername() on

Hi charlie,

if the user has been able to authenticate previously something must have changed, either in AD or in your reportserver. You can log various information using the following:

import java.util.logging.Level;
import java.util.logging.Logger;
 
logger = Logger.getLogger(getClass().getName());

logger.log(Level.SEVERE, "ldap logging");

by using the logger you can check what exactly is happening inside the ldap pam script. For example, log out "####### LdapPAM: authenticate success (usr=" + u.getUsername() + ")" or similar to debug what's happening.

Regards,
Eduardo