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From "Brian" <>
Subject RE: Tomcat 6.0.29 using more and more RAM until it collapses?
Date Tue, 16 Nov 2010 04:39:55 GMT
Hi Chuck,

Now I think you must be right.It is not impossible that one of my pages is huge. They are
dynamically created, so something could be wrong in my programming to deliver a huge page
for some requests.

Isn't there a log of all the requests? I have one running.... Maybe the log could show the
size of the responses.... if that is possible, I could see what is the URL of the gigantic
page and easily find the reason.... I will check that....

> -----Original Message-----
> From: Caldarale, Charles R []
> Sent: Monday, November 15, 2010 10:38 PM
> To: Tomcat Users List
> Subject: RE: Tomcat 6.0.29 using more and more RAM until it collapses?
> > From: Brian []
> > Subject: RE: Tomcat 6.0.29 using more and more RAM until it collapses?
> > sometimes Tomcat thinks that needs a huge buffer, so it makes the
> > array to increase to millions of chars. I have no such big pages in my
> > site
> This is the crux of the problem - you apparently *do* have something that
> requires such a large buffer.  Don't know if it's nested JSPs, some kind of
> recursive include, or ???.  Unfortunately, I'm not aware of any existing
> mechanism in Jasper that will log these exceptional allocations, so someone
> would have to put in some new logging code to catch the situation.  The
> method that does this is reAllocBuff() at the end of
> org.apache.jasper.runtime.BodyContentImpl; the current algorithm usually
> just doubles the size of the buffer when the size of the current one is
> exceeded.  It would be easy just to add a simple logging call (or even a print
> statement, temporarily) that includes a stack trace when some size threshold
> is exceeded.
>  - Chuck
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