Monitoring replication
In order to identify replication-related problems, you can use the Active Roles console connected to the Publisher Administration Service. If there are any replication failures, a red triangle is displayed on the Server Configuration and Configuration Databases containers in the console tree. In the details pane, the same icon is used to highlight the database affected by a replication failure.
If you have encountered a replication failure, you should ensure that the SQL Server Agent service is started on the computer running the Publisher SQL Server, and then use SQL Server Management Studio to get more information on that failure:
- In Object Explorer, connect to the instance of the SQL Server Database Engine that holds the Publisher role, and then expand that instance.
- Right-click the Replication folder, and click Launch Replication Monitor.
- In the left pane of the Replication Monitor window, expand your Publisher SQL Server, and click AelitaReplica.
- In the right pane of the Replication Monitor window, on the Warnings and Agents tab, look for a red icon under Agents and jobs related to this publication. This icon indicates a Snapshot Agent error:
- Right-click the agent that has encountered an error and then click View Details.
- In the Snapshot Agent window, view the error description under Error details or message of the selected session.
- In the right pane of the Replication Monitor window, on the All Subscriptions tab, look for a red icon in the list of subscriptions. This icon indicates a Merge Agent error:
- On the All Subscriptions tab, right-click the subscription that has encountered an error and then click View Details.
- In the Subscription window, view the error description under Last message of the selected session.
Some typical errors are discussed later in this document (see the Troubleshooting Replication failures section). The Troubleshooting Replication failures section also provides information on how to resolve such errors.
Viewing database connection settings
The most common reasons for replication problems are access failures that Replication Agents encounter when attempting to connect to the Publisher or Subscriber SQL Server. Given that security credentials of Replication Agents depend on authentication mode of the Administration Service, you may need to examine Administration Service database connection settings in order to see which mode is actually used—Windows authentication or SQL Server authentication.
You can view connection settings in the Active Roles console:
- In the console tree, select Configuration | Server Configuration | Administration Services.
- In the details pane, right-click the Administration Service you want to examine, and click Properties.
- In the Properties dialog box, go to the Configuration Database tab.
The Configuration Database tab displays the following information:
- SQL Server Identifies the SQL Server instance used by the Administration Service.
- Database The name of the Administration Service database.
- Use Windows authentication When selected, indicates that the Administration Service uses Windows authentication mode when connecting to SQL Server.
- Use SQL Server authentication When selected, indicates that the Administration Service uses SQL Server authentication mode when connecting to SQL Server.
- Login name The name of the SQL Server login that the Administration Service uses to access SQL Server; only applies to the Use SQL Server authentication option.
Modifying database connection settings
You may need to modify Administration Service database connection settings if the login of the Administration Service for SQL Server authentication is no longer valid, or has the password changed. If you change the login, you also need to change it for Replication Agents, as described in the Modifying Replication Agent credentials section later in this document.
You can modify connection settings by using Active Roles Configuration Center:
- Start Configuration Center on the computer running the Administration Service, or connect Configuration Center to that computer.
You can start Configuration Center by selecting Active Roles 7.5.2 Configuration Center on the Apps page or Start menu, depending upon the version of your Windows operating system. For detailed instructions, see “Running Configuration Center” in the Active Roles Administrator Guide.
- On the Dashboard page in the Configuration Center main window, click Manage Settings in the Administration Service area.
- On the Administration Service page that opens, click Change in the Active Roles database area.
- Use the Change Active Roles Database wizard that appears to view or change the login or password of the Administration Service for SQL Server authentication: Type the appropriate login name and password in the fields under the SQL Server authentication option on the Connection to Database page.
Changing the service account
With the Windows authentication option selected for database connection, the Administration Service uses its service account to authenticate with SQL Server. Additionally, if the Administration Service’s database server holds the Publisher role, and has a Subscriber with Windows authentication, the service account requires the appropriate permissions on the Subscriber SQL Server. For details, see the “SQL Server permissions” section in the Active Roles Quick Start Guide.
Given this role of the service account, you may need to specify a different service account with sufficient SQL Server permissions. Also, you may need to change the service account’s password. You can view or change the service account by using Active Roles Configuration Center as follows.
- Start Configuration Center on the computer running the Administration Service, or connect Configuration Center to that computer.
You can start Configuration Center by selecting Active Roles 7.5.2 Configuration Center on the Apps page or Start menu, depending upon the version of your Windows operating system. For detailed instructions, see “Running Configuration Center” in the Active Roles Administrator Guide.
- On the Dashboard page in the Configuration Center main window, click Manage Settings in the Administration Service area.
- On the Administration Service page that opens, click Change in the Service account area.
- On the Change Service Account page that appears, type the logon name and password of the service account, and then click Change.