Scenario: What happens after the BlackBerry Administration Service stops responding

The following responses assume that you have configured DNS round robin.

If you configured a hardware load balancer and a BlackBerry® Administration Service stops responding, the hardware load balancer automatically excludes the IP address of the nonresponsive BlackBerry Administration Service instance from the list of available BlackBerry Administration Service instances.

Response of the BlackBerry Enterprise Server component when the BlackBerry Administration Service instance that it is connected to stops responding

The following scenario demonstrates what happens to the BlackBerry® Enterprise Server components that are BlackBerry Administration Service clients.

  1. The BlackBerry Administration Service instance does not respond to requests from the BlackBerry Enterprise Server component.
  2. The BlackBerry Enterprise Server component tries to connect to another BlackBerry Administration Service instance.
    One of the following events occur:
    • If the BlackBerry Enterprise Server component can connect to another BlackBerry Administration Service instance, the BlackBerry Enterprise Server component sends subsequent requests to that BlackBerry Administration Service instance.
    • If the BlackBerry Enterprise Server component cannot connect to another BlackBerry Administration Service instance, you must resolve the issue.

Response of the browser when the BlackBerry Administration Service instance that it is connected to stops responding

The following scenario is specific to the browser that an administrator is using. It assumes that the administrator is logged in to the BlackBerry Administration Service instance that stopped responding.

  1. The BlackBerry Administration Service does not respond to requests from the browser.
  2. The browser loses the open web session.
  3. The browser uses the BlackBerry Administration Service pool name to request a list of IP addresses from the DNS server.
  4. The DNS server returns the list of IP addresses.
  5. The browser tries to connect to one of the IP addresses on the list.
    One of the following events occurs:
    • If the browser cannot connect to a BlackBerry Administration Service instance that is running, the browser displays a "The page cannot be displayed" error.
    • If the browser can connect to a BlackBerry Administration Service instance that is running, the BlackBerry Administration Service instance prompts the administrator for login information.

If you cannot resolve the issue, you should delete the nonresponsive instance from the DNS record for best performance.


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