Hi All,
Our team will be using NAB40 for our next project.
Since NAB support jsp, do u have any idea that the memory leak issue is well
handled in NAB?
Thanks
Ailing.L \(^o^)/
Drew Cox wrote:
> Hi Dustin,
>
> There are a myriad of reason why the Java VM can appear to leak memory,
> mostly (all?) due to your objects still being referenced somewhere in
> your software that you didn't expect.
>
> But in the case of JSP and specifically the JSWDK, I have come across
> one tricky fact that caused a similar situation to the one you
> described. By default, the JSWDK JSP implementation leaves the session
> timeout value as "never timeout" (-1 from memory). This means that,
> unless you explicity invalidate your sessions, they will continue to
> exist in the container until it is restarted. Of course, each time a
> user closes their browser, they loose the session cookie and get
> allocated a new session when they next visit. This was causing our web
> apps to hemorrage memory under NT until the "out of virtual memory error
> occurred"
>
> I have since added the somthing similar to the following code to our
> globally included jsp header file :
>
> session.setMaxInactiveInterval(barrack.jsp.JSPUtil.SESSION_TIMEOUT_SECS)
> ;
>
> This appears to have fixed our "memory leak" 100%. Many thanks to Craig
> McClanahan for helping with this one!
>
> Regards
>
> Drew Cox
> Barrack Consulting
>
> > -----Original Message-----
> > From: Dustin Aleksiuk [SMTP:[EMAIL PROTECTED]]
> > Sent: Saturday, November 06, 1999 7:02 AM
> > To: [EMAIL PROTECTED]
> > Subject: advice on memory leak
> >
> > I'm having a small problem and I'm wondering if anyone could give me
> > some advice. I'm somewhat new to java and jsp, coming from a C++
> > background.
> >
> > We have a fairly involved e-commerce operation which we are
> > implementing in JSP. After about a day or so of fairly good testing
> > we start getting an 'out of memory' error.
> > We're developing on NT, but our servers run on Solaris. Our test
> > server is the basic little Java server that comes with the JSWDK that
> > you get from Sun.
> >
> > Questions:
> >
> > Has anyone experienced this? Could it be the Web Server we're using
> > for our testing (meaning the problem will go away when we move to a
> > better web server)?
> >
> > Also: where should I start looking for this, if the bug is in my code?
> >
> > Has anyone done any extensive testing on the Jswdk server (or whatever
> > it's called) for an extended period of time?
> >
> > Thanks a lot,
> >
> > Dustin Aleksiuk
> >
> > [EMAIL PROTECTED]
>
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