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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Same class but not equal ==
Date Thu, 03 Aug 2006 02:44:06 GMT
One option out of class-loader-and-serializer-hell is to use the
XStreamMarshaller with Lingo

On 8/3/06, Nguyen Kien Trung <trung.n.k@gmail.com> wrote:
> Hi Hiram,
>
> Thanks for the suggestion.
> In fact, I'm using TCP to connect to ActiveMQ... but it seems not
> working though.
>
> Btw, I've found a blog:
> http://jroller.com/page/sjivan?entry=asynchronous_calls_and_callbacks_using
> Sanjiv (the blogger) explained about asynchornous invocation in which I
> am thinking that could be a root cause.
>
> Since I have the [manager.war] and quite number of modules,
> [module1.war], [module2.war], [module3.war] ....
> As explained in the blog... I understood that with my current
> configuration, by using JmsServiceExporter, the manger uses a single JMS
> Session to handle concurrent messages that are sent by modules. Here we
> go, the situation is getting worse here....
>
> I'm not an expert in JMS so I can't explain well in this. How do you all
> think about it?
>
> Trung
>
>
> Hiram Chirino wrote:
> > JBoss has a long history of using funky non-standard classloaders.  It
> > has burned many folks in the past and since the classloaders are not
> > standard classloaders, it hard to debug the issue at times.  The
> > easiest thing I can recommend is that you use TCP transport to connect
> > to your brokers.  Hopefully the serialization that this forces will
> > fixe your classloading issues.
> >
> > On 8/1/06, Nguyen Kien Trung <trung.n.k@gmail.com> wrote:
> >> Thanks, James for the prompt reply.
> >>
> >> You're right about the classloader. In my third log.debug(), I tried to
> >> compare classloader of two classes (whose types look the same)
> >> And it returns FALSE. It means, there's a difference in classloader.
> >>
> >> I'm not quite familiar with classloader stuff, so let's me explain my
> >> package deployment so that you could help me to figure out.
> >>
> >> I deploy in JBoss 4.0.4.GA as war files, each war file contains Core.jar
> >> (which has all model classes - classes that i'm talking above regarding
> >> the error) and Lingo.jar
> >> [FrontEnd.war]
> >>         ||
> >>         || ActiveMQ
> >>         ||
> >> [Manager.war]
> >>         ||
> >>         || ActiveMQ
> >>         ||
> >> [Module.war]
> >>
> >> There are 2 things which may be important to consider
> >> 1) When i switch to JBossMQ, then things are going just fine.
> >> 2) The error occurs randomly - not for particular method in the proxy
> >> object
> >> 3) When I try to debug - timing delay - then there's no error
> >>
> >> >>      log.debug("equal class loader ==? : " +
> >> >> (m.getParameterTypes()[0].getClassLoader() ==
> >> >> invocation.getParameterTypes()[0].getClassLoader())); // return false
> >>
> >
> >
>
>


-- 

James
-------
http://radio.weblogs.com/0112098/

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