I have the following code.
package org.example;
import java.io.IOException;
import javax.servlet.http.*;
public class HelloAppEngineServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
static_counter++; member_counter++;
resp.getWriter().println("static_counter = " + static_counter +
"
member_counter = " + member_counter);
}
private static int static_counter = 0;
private static int member_counter = 0;
}
I am expecting static_counter will always live, and never reset back
to 0 once it start to increment, as long as I do not perform any new
upload (Hence, the JVM of the server will not be restarted, I guess)
For member_counter, I expect it can be reset to 0 sometimes, as
servlet container may choose to create another new instance due to
certain situation.
However, my observation is that, after I am getting
static_counter = 3 member_counter = 3
If I let my web browser idle for says an hour, I will get
static_counter = 1 member_counter = 1
Seems the JVM had been restarted?
Can anyone explain why this happen?
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