Invalidating a stale session

Required after a table is created through the Hive shell, before the table is available for Impala queries.

The next time the current Impala node performs a query against a table whose metadata is invalidated, Impala reloads the associated metadata before the query proceeds.

In a previous Web Logic Server release, a change was introduced to the Session ID format that caused some load balancers to lose the ability to retain session stickiness.

Zope’s session management makes use of name-spaces like cookies, HTTP form elements, and/or parts of URLs “in the background” to keep track of user sessions.

Which of these name-spaces are used is configurable using the browser_id manager (described later).

A session is secure if and only if: near the end of this document.

It is advisable to use sessions only on pages where they are necessary because of a performance impact on your application.

However, configuring how Web Logic Server manages sessions is a key part of tuning your application for best performance.

When you set up session management, you determine factors such as: You can also store data permanently from an HTTP session. You configure Web Logic Server session tracking by defining properties in the Web Logic-specific deployment descriptor, .is defined as a series of related browser requests that come from the same client during a certain time period.Session tracking ties together a series of browser requests—think of these requests as pages—that may have some meaning as a whole, such as a shopping cart application.Fortunately for us servlet developers, it's not always necessary for a servlet to manage its own sessions using the techniques we have just discussed.The Servlet API provides several methods and classes specifically designed to handle session tracking on behalf of servlets.Syntax: in the common case where you add new data files for an existing table.

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