"Pool backend discovery failed" error when you try to create an enterprise pool by using the Lync Server 2010 or Communications Server deployment wizard

Article translations Article translations
Article ID: 961944 - View products that this article applies to.
Expand all | Collapse all

On This Page

SYMPTOMS

When you try to create an enterprise pool by using the Microsoft Lync Server 2010 or Microsoft Office Communications Server deployment wizard, you receive the following error message:


An error occurred during the pool backend detection:

Pool backend discovery failed.

Failed to execute the reconfigure command. Please ensure pending configuration changes are all resolved before installation can continue.

CAUSE

Cause 1

This issue occurs because of a problem in the Allow updates configuration option on the back-end computer that is running Microsoft SQL Server.

Cause 2

This issue occurs because of a problem in the Affinity mask configuration option on the back-end computer that is running SQL Server.

RESOLUTION

Note To perform the steps that are described in the resolutions for Cause 1 and for Cause 2, you must be logged on to the computer that is running SQL Server by using a Windows domain user account that is assigned the SQL Server sysadmin role.

Resolution for Cause 1

To resolve this issue, follow these steps on the back-end computer that is running SQL Server:
  1. Start SQL Server Management Studio.
  2. In the Connect to Server dialog box, click the appropriate values in the Server type list, in the Server name list, and in the Authentication list. Then, click Connect.
  3. On the standard toolbar, click New Query.
  4. Type the following SQL query in the Query Editor:
    sp_configure 'allow updates', 0
    go
    reconfigure with override
    go
  5. Press F5 to run the SQL query.
Note Microsoft SQL Server 2008 has deprecated the sp_configure 'allow updates' command. This feature is scheduled to be removed in a future version of SQL Server.

Resolution for Cause 2

To resolve this issue, follow these steps:
  1. Run a SQL Profiler trace by using the SQL Profiler tool on the back-end computer that is running SQL Server.

    Note You receive the following error message in the SQL Profiler trace:

    The affinity mask specified conflicts with the IO affinity mask specified. Use the override option to force this configuration.
  2. Run SQL queries on the back-end computer that is running SQL Server to determine whether there is a conflict between affinity masks. To do this, follow these steps:
    1. Start SQL Server Management Studio.
    2. In the Connect to Server dialog box, click the appropriate values in the Server type list, in the Server name list, and in the Authentication list. Then, click Connect.
    3. On the standard toolbar, click New Query.
    4. Type the following SQL query in the Query Editor:
      sp_configure 'show advanced options', 0
      go
      reconfigure with override
      go
    5. Press F5 to run the SQL query.
    6. On the standard toolbar, click New Query.
    7. Type the following SQL query in the Query Editor:
      sp_configure
    8. Press F5 to run the SQL query.
    Note You may notice a conflict between the affinity masks when you run the SQL queries. For example, you may see a result that resembles the following:
    affinity I/O mask	-2147483648	2147483647	127	127
    affinity mask	        -2147483648     2147483647	127	127
    affinity64 I/O mask	-2147483648	2147483647	0	0
    affinity64 mask	        -2147483648     2147483647	0	0
  3. Run an SQL query on the back-end computer that is running SQL Server to remove the conflict between the affinity masks. To do this, follow these steps:
    1. In SQL Server Management Studio, click New Query on the standard toolbar.
    2. Type the following SQL query in the Query Editor:
      sp_configure 'affinity mask', 0
      go
      reconfigure with override
      go
    3. Press F5 to run the SQL query.

    Note For more information about SQL Server affinity mask configurations, visit the following Microsoft website:
    http://support.microsoft.com/kb/2157114

Properties

Article ID: 961944 - Last Review: October 26, 2010 - Revision: 3.0
APPLIES TO
  • Microsoft Office Communications Server 2007 R2 Enterprise Edition
  • Microsoft Office Communications Server 2007 R2 Standard Edition
  • Microsoft Office Communications Server 2007 Enterprise Edition
  • Microsoft Office Communications Server 2007 Standard Edition
  • Microsoft Lync Server 2010 Enterprise Edition
Keywords: 
kbexpertiseadvanced kbtshoot kbsurveynew KB961944

Give Feedback

 

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com