title: Rails: Cookieoverflow. When does Rails use cookies without letting me know?
body: <p>without posting my exact problem with a Cookieoverflow, I want to ask, what can cause a CookieOverflow?</p>
  
  <p>I have only one session-var <code>session[:user] = @user</code>, which is the current logged in account.</p>
  
  <p>In my whole app I have no problems with a CookieOverflow, but in one action, where I am not using the session- or cookies-var, I get a CookieOverflow.</p>
  
  <p>So without inspecting my problem in detail, what can cause a CookieOverflow as well, when it is not the false use of <code>session[]</code> and <code>cookies[]</code>?</p>
  
  <p>I really don't think that this session-var for the user is really the problem... I commented it out and still get the error.</p>
  
  <p>So the question is exactly, "In what cases does Rails use cookies, without my explicit call of it? / When does Rails use cookies, wihtout letting me know of it?"</p>
  
  <p>Yours,</p>
  
  <p>Joern</p>