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Assuming I follow the steps in this answer to deploy a new version of an application without downtimes. When I route the users to the new application server instance, the application will not remember their session so they will be logged out without warning.
Is there a way to keep the sessions alive over multiple servers or to make a “session snapshot” or similar?
In my case it’s a Java application if that matters.
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Store the session data on a separate server that both application servers have access to.
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