Limitations of federated repositories

This topic outlines known limitations and important information for configuring federated repositories.

Configuring federated repositories in a mixed-version environment

In a mixed-version deployment manager cell that contains both Version 6.1.x and Version 5.x or 6.0.x nodes, the following limitations apply for configuring federated repositories:
  • You can configure only one Lightweight Directory Access Protocol (LDAP) repository under federated repositories, and the repository must be supported by Version 5.x or 6.0.x.
  • You can specify a realm name that is compatible with prior versions only. The host name and the port number represent the realm for the LDAP server in a mixed-version nodes cell. For example, machine1.austin.ibm.com:389.
  • You must configure a stand-alone LDAP registry; the LDAP information in both the stand-alone LDAP registry and the LDAP repository under the federated repositories configuration must match. During node synchronization, the LDAP information from the stand-alone LDAP registry propagates to the Version 5.x or 6.0.x nodes.
    Important: Before node synchronization, verify that Federated repositories is identified in the Current realm definition field. If Federated repositories is not identified, select Federated repositories from the Available realm definitions field and click Set as current. Do not set the stand-alone LDAP registry as the current realm definition.
  • You cannot configure an entry mapping repository or a property extension repository in a mixed-version deployment manager cell.

Configuring LDAP servers in a federated repository

The LDAP connection connectTimeout default value is 20 seconds. LDAP should respond within 20 seconds for any request from WebSphere Application Server. If you cannot connect to your LDAP within this time, make sure that your LDAP is running. A connection error displays at the top of the LDAP configuration panel when the connection timeout exceeds 20 seconds.

Coexisting with Tivoli Access Manager

For Tivoli Access Manager to coexist with a federated repositories configuration, the following limitations apply:
[Updated in August 2011]

Limitation for repository ID in federated repositories configuration

In a federated repositories configuration, the repository ID must not exceed a length of 36 characters. If the repository ID exceeds 36 characters, an error may occur while retrieving or storing data, especially if the property extension repository is configured.

[Updated in August 2011]
aug2011
[Updated in August 2011]

z/OS LDAP server with RACF not supported

WebSphere Application Server federated repositories DO NOT support a z/OS LDAP server with an SDBM backend (resource access control facility (RACF)).

[Updated in August 2011]
aug2011



Related tasks
Managing the realm in a federated repository configuration
Related reference
Standalone LDAP registry settings
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