Web-based clients, applets, servlets, and JSPs

If these clients do not need database access, they run as usual, without interruption. If database access is needed, requests will fail until the failover has finished. In addition to direct database access, these clients may also use persistent HTTP sessions. Once the database failover has finished, with no more than one retry, these clients should run as usual.

Web-based clients are easy to retry on the client side (just go back in the browser and submit the request again). Therefore, coding a retry block is not as important as in applications. But you can choose to code the retry block in your servlets and applets.

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