Re: Memory leaking

I found the leak!

This Netbeans profiler tool is really amazing :)

Well, the fact: the memory was allocated by

private void handleScriptException( Exception e, String badScript )

in com.meterware.httpunit.javascript.JavaScript$JavaScriptEngine

and I discovered that HttpUnit stores *all* JavaScript Exceptions in a
private buffer, which *you* have to clear manually from time to time,
if you don't want to loose your memory along the way :)

The "buffer":

private static ArrayList _errorMessages = new ArrayList();

You can clear that buffer calling:

HttpUnitOptions.clearScriptErrorMessages();

I think this "feature" should be disabled by default or... i don't
know, use a buffer of limited size...

Cheers.

2006/12/18, Morgan Christiansson <[email protected]>:
> Perhaps you're keeping references to the original String's containing
> the whole 500kb of returned data from the webserver.
>
> This would be caused by for example String.substring() which doesn't
> create a new string but only references part of the original string, try
> calling new String() on strings you keep to ensure that you're not
> keeping old data in memory by accident.
>
> For more info look at this  google search:
> http://www.google.co.uk/search?hl=en&safe=off&q=java+string+memory+leak
> +substring&btnG=Search&meta=
>
> Although it could very well be something else. But String leaks in this
> way is quite common, esp. as you deal with a lot of String's.
>
> Regards,
> Morgan
>
> On Mon, 2006-12-18 at 10:29 +0100, andresgr wrote:
> > I'm trying to profile it, but the app hangs most of the time when i
> > try to take a snapshot (Nebeans 5.5 + Profiler).
> >
> > So I don't know if it is httpunit or my code....
> >
> > 2006/12/16, James Abley < [email protected]>:
> >         I haven't seen this myself. Have you profiled the application
> >         to see
> >         what's leaking?
> >
> >         On 12/12/06, andresgr <[email protected]> wrote:
> >         > Hi.
> >         >
> >         > Has anybody experienced memory leaking problems with
> >         httpUnit? I have
> >         > problems when i run long tests (one or two days) and big
> >         pages (500K
> >         > or so).
> >         >
> >         > I use WebResponse.getText() method for each page, which
> >         creates
> >         > temporal buffers, strings etc.
> >         >
> >         > Anyone had similar problems?
> >         >
> >         > Regards.
> >         >
> >         > --
> >         > -=-=-=-=-=-=-=-=-=-=-=-=-
> >         > Andrés González.
> >         > http://coyotevil.blogspot.com
> >         >
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-- 
-=-=-=-=-=-=-=-=-=-=-=-=-
Andrés González.
http://coyotevil.blogspot.com

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