The information in this page can be used to help troubleshoot LDAP issues.

Working Directly with a Specific LDAP Server

It is common to access LDAP via a VIP (Virtual IP), a dynamic DNS record (which returns a different LDAP server every time) or a load balancer. Such a setup can cause indeterminate behavior if one of the LDAP server is malfunctioning, and debugging is much harder.

Working directly against a specific LDAP server helps a lot in troubleshooting and is the first recommended step to figure out whether the issue is with one of the LDAP servers or within the LDAP configuration of DPOD.

In case of a dynamic DNS record, it is possible to find the list of LDAP servers represented by the domain name using the nslookup command:

nslookup <LDAP DNS Name>

Make sure you can connect to all LDAP servers from DPOD server using the telnet command, for example:

telnet <LDAP Server IP Address> <LDAP Port>

Choose one of the LDAP servers and use the LDAP Configuration Script to configure LDAP with the specific LDAP server IP address.

Debugging

To enable debug logging, which includes the LDAP realm, edit the service log4j2 configuration file at /app/ui/MonTier-UI/lib/log4j2.xml or /app/appadmin/MonTier-AppAdmin/lib/log4j2.xml.

Change the "org.montier" logger to level="debug" as describe below:

<Logger name="org.montier" level="debug" additivity="false">
	<AppenderRef ref="MONTIER"/>
	<AppenderRef ref="CATALINA"/>
</Logger>

To enable trace logging of custom roles, edit the UI service log4j configuration file at /app/ui/MonTier-UI/lib/log4j2.xml.

Change the "MNTR_CUSTOM_ROLES" logger to level="trace" as describe below:

<Logger name="MNTR_CUSTOM_ROLES" level="trace" additivity="false">
		<AppenderRef ref="LDAPLOG"/>
</Logger>

The output log file will be created in the UI service log directory: /logs/ui with the name ldapLog.log

Common Issues

Referrals

You might get the following error message:

An exception performing authentication javax.naming.PartialResultException: Unprocessed Continuation Reference(s); remaining name 'DC=XX,DC=XX,DC=XX'

The issue may be resolved by changing the referrals parameter (both inside the server.xml file and system parameters) to "ignore" and connecting to the greater AD "forest", which acts like a regular LDAP server on port 3268 (or 3269 for LDAPS).

LDAP authentication error codes

See the following link: http://www-01.ibm.com/support/docview.wss?uid=swg21290631

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