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From "Mike Curwen" <mi...@gb-im.com>
Subject RE: Tomcat - Automatically writes a session?
Date Tue, 20 Jan 2004 23:18:18 GMT
I think it's slightly unfair to characterise the 'on by default' as a
'huge' waste of resources.
 
As Yoav mentioned, the session object is essentially empty and very
small. If you don't use it, it should not be a problem. As for 'RAM
resources to write a cookie...', that's accomplished on the client, so
no load on our server.
 
Also, because it's "on by default", you need to ensure that every single
JSP includes the 'no session please' directive. Missing it once will
create a session for every user that hits the page. Look for this
especially in some sort of 'meta' page (like header.jsp or login.jsp or
footer.jsp)  which are included in any number of other pages.
 
As for filters, people are referring to any javax.servlet.Filter classes
you may have written.  



> -----Original Message-----
> From: neal cabage [mailto:nealcabage@yahoo.com] 
> Sent: Tuesday, January 20, 2004 3:48 PM
> To: Tomcat Users List; tfohrer@t-online.de
> Subject: Re: Tomcat - Automatically writes a session?
> 
> 
> Unfortunately this isn't working either.  In addition to the 
> <%@page session="false"%> directive in my JSP, I have also 
> set the cookies="false" attribute in my server.xml file, for 
> the host in question.  It is *still* happening!  
>  
> Perhaps this is a Tomcat bug, as previously suggested?  
> Correct me if I'm wrong, but doesn't this imply a *HUGE* 
> waist of RAM resources to be writing a cookie like this by 
> default?  Why on earth would a web app do this by default?  
> Are there any other ways to shut it off?  It was mentioned in 
> the previous thread to look at the servlet being compiled, 
> which may be a good idea - but I don't know what the solution 
> will be if it is in fact compiling the servlet incorrectly.  
> Any other config opps to choke it off?
>  
> Neal
> 
> 
> Torsten Fohrer <TFohrer@t-online.de> wrote:
> 
> tomcat sents automatically a cookie named jsessionid for 
> session maintain to a 
> browser. with cookies="false" as a context attrribute you 
> disable this 
> behaviour
> 
> 
> 
> from tomcat documentation:
> 
> ------
> cookies 
> 
> Set to true if you want cookies to be used for session identifier 
> communication if supported by the client (this is the 
> default). Set to false 
> if you want to disable the use of cookies for session identifier 
> communication, and rely only on URL rewriting by the application.
> ----
> 
> or http://jakarta.apache.org/tomcat/tomcat-5.0-doc/config/context.html
> 
> cu Torsten Fohrer
> 
> 
> On Tuesday 20 January 2004 20:58, you wrote:
> > Verify in your JSP's .java file that sessions are really 
> being turned 
> > off. Look to see if there is a
> > session=pageContext.getSession()
> >
> > Also, I think the call to
> > pageContext = _jspxFactory.getPageContext(.....
> >
> > Needs to have "false" as the 3rd to last argument.
> >
> > >>> fiol.bonnin@terra.es 1/20/04 12:39:54 PM >>>
> >
> > Neal wrote:
> > >I used the tag "" which does appear correct,
> > >but I'm still seeing that header:
> > >
> > >"Set-Cookie: JSESSIONID=97C8777F16379B8EC2CD17273CE35C3C; Path=/"
> > >
> > >There are two reasons why I want to get rid of this:
> > >
> > >1. I assume I'm waiting server resources holding open a 
> session for 
> > >every user, unnecessarily.
> > >
> > >2. I've been told this may prevent Google from properly 
> spidering the 
> > >site.
> > >
> > >
> > >Can you please shed any more light on how to fix this potential
> >
> > issue?
> >
> >
> >
> > Probably not, but I will try...
> >
> > Did you clear the cookies on your browser? If the browser is saying 
> > "Hi! XXX is my session ID", then, (iif that session 
> exists), tomcat is 
> > free
> >
> > of saying "Hi! keep your session ID, which is XXX"
> >
> > Other than that, no idea. I have never struggled to avoid cookies. 
> > Sorry. I was only echoing something I have read in the past.
> >
> >
> > Antonio Fiol
> >
> > Jeff Tulley (jtulley@novell.com)
> > (801)861-5322
> > Novell, Inc., The Leading Provider of Net Business Solutions 
> > http://www.novell.com
> >
> > 
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