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Published Jul. 2, 2025

LDAP users are unable to log in

Written By

Sivakumar Perumal

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Issue

  • Users who are present in LDAP are unable to perform login into Liferay and the below error was observed at the server console.
    ERROR [liferay/scheduler_dispatch-4][PortalLDAPImporterImpl:717] Unable to import user CN=abdulfar: null:null:{samaccountname=sAMAccountName: abdulfar}
    com.liferay.portal.DuplicateUserEmailAddressException: {userId=6404764}
     at com.liferay.portal.service.impl.UserLocalServiceImpl.validate(UserLocalServiceImpl.java:6053)
     at com.liferay.portal.service.impl.UserLocalServiceImpl.addUserWithWorkflow(UserLocalServiceImpl.java:753)
     at com.liferay.portal.service.impl.UserLocalServiceImpl.addUser(UserLocalServiceImpl.java:615)
     at sun.reflect.GeneratedMethodAccessor972.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:606)

Environment

  • Liferay Portal 6.x
  • Liferay DXP 7.x

Resolution

  • Explanation: In generic, when the LDAP user is trying to perform a login into Liferay, the respective user attributes will be imported to Liferay from LDAP. While importing, the attributes will be validated to have a unique attribute. In case if any attribute value is matching with any user's attribute value who is already present in Liferay database, then the Duplicate exception will be thrown.
  • In the above error, the user's attribute(email address) value which is already present in Liferay's database is matching with the LDAP user who is trying to perform the login. Due to which the above error is thrown which results in LDAP users are unable to perform the login.
  • Each user's required attribute must be unique.
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