[olug] Java VM Issues

[Sean Edwards]

We use BEA's WebLogic Server as a platform for our
custom Java applications.  Since WebLogic is a
commercial J2EE platform, it is our experience to
strictly adhere to the vendor requirements for the
product.

Here is an example from trying to deploy Oracle Report
server with WebLogic:  The requirements for WebLogic
Server 7.0.2 are Sun JVM 1.3.1_06 on RedHat 7.2.  The
Oracle Reports Servlet was compiled with Sun JVM 1.2. 
The app server for one of our customers requires the
JVM max memory set to a large value.  Every time we
started the server, it would crash.  The issue was
that the Oracle Reports Server was compiled with Sun
JDK 1.2, and it did not like the values for the JVM
memory settings.  We now have to run Oracle Reports
from a database server, because the servlet would not
work in our app server environment.

With RedHat dropping support of 7.2 in December, BEA
is changing the environment requirements for WebLogic.
 When we move off of RedHat 7.2, we will also move
from Sun's JVM to JRockit (a JVM BEA has "optimized"
for their WebLogic Server product).  By the way,
WebLogic Server 8.1 requires Sun's JVM 1.4

So to answer your question about which JVM is the
best, I would say what ever the vendor requires.

-=Sean=-

--- kent tegels <ktegels at Msn.com> wrote:
> Ah, the joy of traveling in the undiscovered
> country...
> 
> We're a Windows shop planning our move away from the
> MSJVM to a SUN JVM. We
> have an off-the-shelf application that seems to
> insist on having 1.2.0 of
> the VM installed. I'm wondering however, if that's
> the safest version of the
> JVM we could deploy. Can somebody point me to where
> I can find information
> on the difference security-wise between the various
> JVM versions?
> 
> Please don't laugh and remind that I'm trying fix a
> sandbag when there's
> whole Ocean of issues waiting to pound us. I know
> that. One headache a day
> is my limit and I've already got that... <grin>
> 
> Also, am I correct in assuming that the versions of
> the JDK and JVM are kept
> "in-sync?"
> 
> Thanks!
> Kent
> 
> 
> 
> _______________________________________________
> OLUG mailing list
> OLUG at olug.org
> http://lists.olug.org/mailman/listinfo/olug


__________________________________
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
http://shopping.yahoo.com