Massive memory leak org.htmlunit.corejs.javascript.Arguments$ThrowTypeError

[jogger2510]

Using latest 4.10.0 the plain vanilla code below leaks the above objects when running with Javascript enabled for longer periods of time. The silent error handler and exception suppression do not help. Memory leaked is about 200M / hour / JS executor. Different websites tried.

webClient = new WebClient(BrowserVersion.FIREFOX); page = webClient.getPage(url);

[rbri]

Hi @jogger2510,

can you please provide some more details. You mean you open a page and then wait only to see the memory leak?
Is this new in 4.10 or a older problem?

Any chance to provide the url to let me reprouce?

[jogger2510]

Hi, I am new to HtmlUnit, tried no older version.
I just load the page as described above. You can see in VisualVM, that the JS Executor goes high on CPU and memory allocation and Objects of type org.htmlunit.corejs.javascript.Arguments$ThrowTypeError leak.

URL that leaks fastest in my setup: https://live.euronext.com/en/product/equities/SGXZ53070850-XOSL

[rbri]

Debugging this will require some time. But as a first step we might optimize Rhino a bit to reduce the number of objects created here (see my Rhino PR)

[rbri]

minor update, there is a intervall function that fails with an error - this happens over and over again (intervall), therefore i guess this might be part of the story

[skyhirider]

Does loading an empty page clean up the javascript assigned to it?

When I use HtmlUnit, I get a driver from a pool, do actions, load an empty page ( driver.get("data:text/html;charset=utf-8,empty" ) ) and return it to the pool.

Found its a good way to keep sessions on standby going crazy in the background.