Scenario: What happens after the BlackBerry Attachment Service stops responding

If a BlackBerry® Attachment Service stops responding, the primary BlackBerry® Enterprise Server responds differently if it can connect to another BlackBerry Attachment Service instance in the pool.

These responses assume that the health of the BlackBerry Attachment Service is above the failover threshold, the BlackBerry Enterprise Server is still running, and the BlackBerry Attachment Service cannot restore itself.

Response of the primary BlackBerry Enterprise Server when it can connect to another BlackBerry Attachment Service

  1. The primary BlackBerry Enterprise Server tries unsuccessfully to reopen the connection to the BlackBerry Attachment Service instance that it was using when it lost the connection.
  2. The primary BlackBerry Enterprise Server tries to connect to another BlackBerry Attachment Service in the pool.

The primary BlackBerry Enterprise Server can connect to another BlackBerry Attachment Service, and attachment viewing is restored.

Response of the primary BlackBerry Enterprise Server when it cannot connect to another BlackBerry Attachment Service

  1. The primary BlackBerry Enterprise Server tries unsuccessfully to reopen the connection to the BlackBerry Attachment Service instance that it was using when it lost the connection.
  2. The primary BlackBerry Enterprise Server tries unsuccessfully to connect to another BlackBerry Attachment Service in the pool.
  3. The primary BlackBerry Enterprise Server lowers its health score.

    The health score of the BlackBerry Enterprise Server falls below the failover threshold.

  4. The standby BlackBerry Enterprise Server checks its health score to determine if it is above the promotion threshold.
    One of the following events occurs:
    • If the health score of the standby BlackBerry Enterprise Server is above the promotion threshold, the standby BlackBerry Enterprise Server demotes the primary BlackBerry Enterprise Server and tries to promote itself to become the primary instance.
    • If the health score of the standby BlackBerry Enterprise Server is below the promotion threshold, the standby BlackBerry Enterprise Server cannot promote itself and you must resolve the issue.

Was this information helpful? Send us your comments.