title: why session is ended when cache is cleared
body: <p>Why session is lost or ended when cache is cleared. While session is mentioned on server. I am java developer and I got session from <code>HttpServletRequest</code> object. </p>
  
  <p>We manage the session on server side. Then how it is related with browser and client? Why our website is logged out when cache is cleared? </p>
  
  <p>I tried it with my gmail account. When i close browser and again open gmail or when i clear cache it shows me logged out. I did google about but could not got satisfying answer. can anybody clear it?</p>