OUD - Unable to Create Unique Attribute Constraint Plugin in OUD - Error "LDAP: error code 53 - The Directory Server is unwilling to add...but there is no equality index defined for the attribute in backend <BACKEND>..." (Doc ID 1967218.1)

Last updated on NOVEMBER 21, 2023

Applies to:

Symptoms

Unable to create unique attribute constraint plugin in OUD.  An error message is generated when attempting to create a new plugin for uniqueness of a custom attribute called username...

Example -

./dsconfig -h <HOST_NAME> -p <ADMIN_PORT> create-plugin --type unique-attribute --plugin-name "<USERNAME> unique attribute for <SUFFIX_DN>" --set enabled:true --set type:username --set base-dn:ou=<OU_EXAMPLE>,dc=<SUFFIX_DN>

        >>>> Specify Oracle Unified Directory LDAP connection parameters

        Administrator user bind DN [<DM_ADMIN>]:

        Password for user '<DM_ADMIN>':


        >>>> Configure the properties of the Unique Attribute Plugin

               Property  Value(s)
               --------------------------------------------
           1)  base-dn   "ou=<OU_EXAMPLE>,dc=<SUFFIX_DN>"
           2)  enabled   true
           3)  type      username

           ?)  help
           f)  finish - create the new Unique Attribute Plugin
           q)  quit

        Enter choice [f]: f

        The Unique Attribute Plugin could not be created because of the following
        reason:

           *  [LDAP: error code 53 - The Directory Server is unwilling to add
              configuration entry cn=<USERNAME> unique attribute for
              <OU_EXAMPLE>,cn=Plugins,cn=config because one of the add listeners
              registered with the parent entry cn=Plugins,cn=config rejected this
              change with the message: An error occurred while attempting to
              initialize an instance of class
              org.opends.server.plugins.UniqueAttributePlugin as a Directory Server
              plugin using the information in configuration entry cn=<USERNAME> unique
              attribute for <OU_EXAMPLE>,cn=Plugins,cn=config:  The configuration for
              the plugin defined in configuration entry cn=<USERNAME> unique attribute
              for <OU_EXAMPLE>,cn=Plugins,cn=config was not acceptable:  The unique
              attribute plugin defined in configuration entry cn=<USERNAME> unique
              attribute for <OU_EXAMPLE>,cn=Plugins,cn=config is configured to operate
              on attribute username but there is no equality index defined for this
              attribute in backend <USER_ROOT> (PluginConfigManager.java:417
              PluginConfigManager.java:5478 PluginConfigManager.java:84
              ServerManagedObjectAddListenerAdaptor.java:101
              ConfigAddListenerAdaptor.java:267 ConfigFileHandler.java:1411
              LocalBackendAddOperation.java:742 LocalBackendWorkflowElement.java:200
              WorkflowImpl.java:363 WorkflowTopologyNode.java:130
              AddOperationBasis.java:736 SynchronousStrategy.java:54
              LDAPClientConnection.java:1307 LDAPClientConnection.java:1913
              LDAPClientConnection.java:1742 LDAPRequestHandler.java:188).  This
              plugin will be disabled]

        Would you like to edit the properties of the Unique Attribute Plugin again in order to resolve this problem?

Cause

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