LDAP external authentication failing with NullPointerException during user login

Issue:

After configuring LDAP authentication and restarting the TIBCO JasperReports® Server, the external user failed to login with a NullPointerException error displayed on the browser page.

The WEB-INF/logs/jasperserver.log file captured the following stack trace :

2021-11-17T13:51:14,865 DEBUG LdapUserDetailsMapper,http-nio-8080-exec-5:58 - Mapping user details from context with DN: cn=Peter Parker,ou=people,dc=maxcrc,dc=com
2021-11-17T13:51:14,868 ERROR ExternalDataSynchronizerImpl,http-nio-8080-exec-5:145 - Error during synchronization java.lang.NullPointerException
    at com.jaspersoft.jasperserver.api.security.externalAuth.ExternalDataSynchronizerImpl.synchronize(ExternalDataSynchronizerImpl.java:103)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:367)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
    at com.sun.proxy.$Proxy188.synchronize(Unknown Source)
    at com.jaspersoft.jasperserver.war.util.ExternalRequestParameterAuthenticationFilter.onSuccessfulAuthentication(ExternalRequestParameterAuthenticationFilter.java:44)
    at com.jaspersoft.jasperserver.war.util.RequestParameterAuthenticationFilter.doFilter(RequestParameterAuthenticationFilter.java:109)

Solution:

This issue can be resolved after applying the latest TIBCO JasperReports® Server 7.9 cumulative hotfix.

The specific defect is addressed in hotfix build 20210909_1344 (hotfix_JRSPro7.9.0_cumulative_20210909_1344.zip)

To obtain this hotfix, log into https://support.tibco.com/s/hotfixes  and locate the cumulative hotfix build 20210909_1344 (hotfix_JRSPro7.9.0_cumulative_20210909_1344.zip) or later.

Follow the instructions to apply the hotfix. 

Note: According to the defect this issue affects Token-based and CAS external authentication methods as well. 

Related Articles:

JS-63380 NullPointerException issue for external authentications (Except externalAuth-db and externalAuth-SSO)