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How can an existing session be invalidated?


An existing session can be invalidated in the following two ways:
Setting timeout in the deployment descriptor: This can be done by specifying timeout between the <session-timeout>tags as follows:

<session-config>
       <session-timeout>10</session-timeout>
</session-config>

This will set the time for session timeout to be ten minutes.

Setting timeout programmatically: This will set the timeout for a specific session. The syntax for setting the timeout programmatically is as follows:
public void setMaxInactiveInterval(int interval)
The setMaxInactiveInterval() method sets the maximum time in seconds before a session becomes invalid.
Note :Setting the inactive period as negative(-1), makes the container stop tracking session, i.e, session never expires.
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