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Oracle WebLogic Server 11g Administration Handbook by Sam Alapati

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Handling Servlet and JSP Failures

In order to understand how a cluster manages servlet and JSP failures, you must first understand how WebLogic Server replicates HTTP session state following a failure of one of these components.

Replicating HTTP Session State

You can set up two different ways of handling application failures. You can use a third-party load balancer, use a proxy plug-in, or use the HttpClusterServlet with a WebLogic instance functioning as a web server. Regardless of whether you use a load balancer or a proxy plug-in, WebLogic Server uses two basic methods to replicate HTTP session state in a cluster. You can configure either a file or JDBC-based persistence of HTTP session state information. Alternatively, you can configure ...

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