Re: [Htmlunit-user] (no subject)

[Andrey S. <asu...@oi...>]

The Rhino javascript interpreter HtmlUnit uses can run in two modes:
compilation (where javascript code is converted into java classes; this is
your case) and interpretation. If you have HtmlUnit source, you can go to
JavascriptEngine.getPageInfo() and add line

    newPageInfo.context_.setOptimizationLevel(-1);

That will switch Rhino to interpretation mode and presumably solve your
problem.

In fact I'd request HtmlUnit authors to either make it default mode, or at
least make it configurable from public API. The compilation mode caused VM
crashes for me (JDK 1.3.1.09 both Windows and Linux; our pages have large js
files of about 500KB per page; after a sequence of 3-5 pages VM throws
OutOfMemory exceptions in random places without actually taking significant
memory from OS); switching to interpretation code fixed that without
noticeable slowdown. The interpretation mode is more stable without any
obvious downside.

Best regards
    Andrey

From: "Erskine, Chris" <chr...@ed...>
> I am getting the following Exception for a test that I am trying to
develop.
> It looks like the root cause is
> java.lang.RuntimeException: java.lang.ClassFormatError:
> org/mozilla/javascript/gen/c396 (Code of a method longer than 65535 bytes)
> This appears to be due to compiling the JavaScript arrays that are defined
> in on the page.  Is there some way to get around this problem?  Would it
be
> possible to fix HtmlUnit to break the source up into some smaller modules
to
> prevent this from happening.  If it is thought that this would work, I can
> try to see if I can get it to work.

...

> Enclosed exception:
> java.lang.RuntimeException: java.lang.ClassFormatError:
> org/mozilla/javascript/gen/c396 (Code of a method longer than 65535 bytes)
> at
> org.mozilla.javascript.optimizer.Codegen.compile(Codegen.java:113)
> at org.mozilla.javascript.Context.compile(Context.java:2076)
> at org.mozilla.javascript.Context.compile(Context.java:2006)
> at org.mozilla.javascript.Context.compileReader(Context.java:899)
> at org.mozilla.javascript.Context.evaluateReader(Context.java:817)
> at org.mozilla.javascript.Context.evaluateString(Context.java:784)

....