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From Martin Gainty <mgai...@hotmail.com>
Subject RE: Speeding up RMI calls
Date Sat, 28 Jul 2012 14:02:12 GMT

Andrew

It *sounds* like you are battling a network latency problem
Can you identify the target RMI server then do a simple tracert from client to RMI Server
to determine which intermediate node is causing the delay?

Martin 
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> Subject: RE: Speeding up RMI calls
> Date: Fri, 27 Jul 2012 17:31:17 -0400
> From: akujtan@evertz.com
> To: users@tomcat.apache.org
> 
> > > On 09/07/2012 16:55, Andrew Kujtan wrote:
> > > > Tomcat Version: 7.0.27
> > > >
> > > > OS: Windows XP/7
> > > > I'm fixing an issue we are having with a webapp that does some
> > > > communication over RMI with a remote  server. Calls that would be
> > > > instant in similar applications not inside the tomcat container
> are
> > > > taking more than 30 seconds when called from tomcat. After
> > debugging
> > > > I've found that  when an RMI call is made, the classlist
> containing
> > > > all the jars in the webapp lib folders is being serialized with
> the
> > > data.
> > > > Which wouldn't be a problem normally, except the webapp has >300
> > jars
> > > > in its lib folder.
> > >
> > > In the other similar applications, are there 300+ jars on the
> > classpath
> > > too?
> > >
> > >
> > > p
> > 
> > Yes they are there as well, but the RMI calls don't include them, or
> > any
> > urls
> > for that matter.
> > 
> > >
> > > > The only solution I have found is to create a custom
> > > WebAppClassloader
> > > > that returns a zero length URL array on the getURLs() call. We
> > don't
> > > > do any dynamic class loading so breaking that is not a problem.
> > > >
> > > > My question is, is there any other way to resolve this, like a
> > > > configuration property? If not, are there any problems that I am
> > > going
> > > > to introduce by overriding this method? Can I override the
> > > classloader
> > > > for just this webapp or am I stuck doing it for the entire tomcat
> > > > instance?
> > > >
> > > >
> > > >
> > > > Thanks,
> > > >
> > > > Andrew Kujtan
> 
> I guess no one has run into this issue before, I've pushed it through
> and am just overloading the classloader in the server.xml 
> 
> Hopefully this doesn't break anything.
> 
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