Alternate access mapping update failed - Event 6397 (SharePoint 2010 Products)


Applies to: SharePoint Server 2010, SharePoint Foundation 2010

Alert Name:   Alternate access mapping update failed

Event ID:   6397

Summary:   Several features of Microsoft SharePoint Foundation 2010 rely on scheduled background processes called timer jobs. Administrators can configure and schedule timer jobs by using SharePoint Central Administration. When you use the Services on Server page of the SharePoint Central Administration Web site to start or stop a service, a timer job performs this action.

To improve the performance of SharePoint Foundation 2010, much of the data in the configuration database in SQL Server 2008 is kept in a local file-system cache, called the configuration data cache. SharePoint Foundation 2010 uses the timer service to keep this cache synchronized with the configuration database. Alternate access mapping is a feature of Microsoft SharePoint Foundation 2010 for administrators to configure a load-balanced system by mapping an incoming URL to alternate URLs that are used by SharePoint Foundation.

This error occurs when the timer job that is used to update alternate access mappings failed on the specified server.

Symptoms:   One or more of the following symptoms might appear:

  • The alternate access mapping settings for Web applications on the local server might not be current.

  • This event appears in the event log: Event ID: 6397 Alternate Access Mapping failed to be updated. Web Application affected: <Web Application>. Current user: <User Name>. More information is provided below.

Cause:   The alternate access mapping specified in the configuration cache was not applied to the IIS settings of the local machine.


You must be a member of the Farm Administrators SharePoint group on the Central Administration site to perform the following task.

Resolution:   Complete the alternate access mapping update

  • The event string for event 6397 provides the alternate access mapping that failed. Try to re-create the mapping by using the Central Administration site.

    To view or change alternate access mapping settings:

    1. On the Central Administration page, click Application Management and in the Web Applications section click Configure alternate access mappings.

    2. To edit the mapping, click the mapping you want to change.

    To verify that the alternate access mapping is correct:

    • If the SharePoint Administration Service was restarted, in the SharePoint Management Shell, run the Windows PowerShell command Start-SPAdminJob to ensure that all tasks required by the administration service were completed.