IBM Support

QRadar: LDAP user authentication failed with "username must contain no more than {0} characters" error



LDAP user is not able to log in to the QRadar GUI. 


Errors similar to the following appear in qradar.error:
[QRADAR] [[email protected]@ (9785) /console/login] edu.vt.middleware.ldap.jaas.JaasAuthenticator: [INFO] Authentication succeeded for dn: [email protected],ou=People,ou=QRADAR,dc=DOMAIN,dc=com
[tomcat.tomcat] [[email protected]@ (9785) /console/login] com.q1labs.uiframeworks.auth.user.LocalUserRepository: [ERROR] [NOT:0000003000][ -] [-/- -]Username must contain no more than {0} characters.
[QRADAR] [[email protected]@ (1718) /console/login] edu.vt.middleware.ldap.jaas.JaasAuthenticator: [INFO] Authentication failed for dn: [email protected],ou=People,ou=QRADAR,dc=DOMAIN,dc=com
[email protected] is the affected user in this example. If you encounter this error, it is because the username is over 61 characters.
UI error example:


The user validator requires LDAP usernames be 61 characters or less.


Resolving The Problem

The admin must edit the LDAP username to have 61 characters or less. After the username is corrected, the error no longer occurs.

[{"Type":"MASTER","Line of Business":{"code":"LOB24","label":"Security Software"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"ARM Category":[{"code":"a8m0z000000cwsyAAA","label":"Admin Tasks"}],"ARM Case Number":"","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Versions"}]

Document Information

Modified date:
22 June 2023