How to keep session alive?

With either GET or POST, the browser does send the SessionId cookie with the request. So for keep-alive purposes it doesn't matter which one you use. Most likely you are seeing the difference in behavior because of the different interval you and "pinging" the server.

With the GET request you did it at an interval of 300000 ms, while with the POST request you did it at an interval of 10000 ms.

Most likely, your server's session lifespan is somewhere between the two values. You could, however, configure the session lifespan to fit your needs (as in increasing it), but keep in mind that expiring sessions is a security feature so try to find a small value that is big enough to let your application work ok, but still allow the session to expire in a safe interval of time.

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Sundaram Subramanian9y ago
With either GET or POST, the browser does send the SessionId cookie with the request. So for keep-alive purposes it doesn't matter which one you use. Most likely you are seeing the difference in behavior because of the different interval you and "pinging" the server.
With the GET request you did it at an interval of 300000 ms, while with the POST request you did it at an interval of 10000 ms.
Most likely, your server's session lifespan is somewhere between the two values. You could, however, configure the session lifespan to fit your needs (as in increasing it), but keep in mind that expiring sessions is a security feature so try to find a small value that is big enough to let your application work ok, but still allow the session to expire in a safe interval of time.