On Nov 17, 1:00 pm, Scott Fleckenstein <[EMAIL PROTECTED]> wrote:
> Hi All,
>
> I've run into a bug since upgrading past revision 1100, specifically
> around adding to the classpath at runtime using add-classpath. I've
> attached a test case
> here:http://s3.amazonaws.com/nullstyle/precompile-bug.tar.gz
>
> That file has three versions of clojure (r1100, r1101, r1106) and
> web.clj, a sample app that loads jetty and starts a simple web
> server. You can use run.sh in that same tar to run each revision, one
> after the other, to illustrate the breakage.
>
> Basically, after adding a jar to the classpath, when importing a class
> file from that jar I get a ClassNotFoundException thrown. I don't
> have enough java experience to know what would cause this problem.
> Things work as expected on revision 1100.
>
> Does anyone know what would cause this? I'd be happy to put in the
> time to help debug and fix this, but I'm at a loss for where next to
> go.
>
Such use of add-classpath is discouraged. The only reason for add-
classpath is to let you pull in something if you've started up the
repl without it. It shouldn't be a permanent part of any application
design. In your case, you can get the local Jetty jars in the mix by
supplying an extension dirs directive (-Djava.ext.dirs=) on the
command line:
java -Djava.ext.dirs=. -cp clojure-r1106.jar clojure.lang.Script
web.clj
All three revisions work with this change, and you can remove the add-
classpath calls.
The change that caused this is that now .class files for Clojure fn
classes can be found and loaded by a classloader higher up in the
chain, one which can't see the effects of add-classpath.
I'm going to deprecate add-classpath because people consistently use
it to avoid the standard classpath-setting mechanisms, at least until
I can figure out a way to coordinate it with the standard classloader.
Rich
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