RE: AS 400 & ejbs

Hi,

We've managed to run JBoss at AS/400, after a couple of tweaks and
nearly a man-week spent on this.

There were some nullpointer exceptions and a lot of other nasty things.
E.g. deleteOnExit() function threw some vague native code exception.
Or AS/400 JVM doesn't accept jars compiled by javac, only by jikes.
Or something else.

Finally, yes, it runs. It takes about 20 minutes to start (model 270
with 150 CPW and Java optimization level 30) but who cares.

The major problem is runtime performance. A modest P-III 733 MHz
outperforms our model 270 at least 5 times (and up to 20 times) on our
load stress simulations, which mostly make use of JBoss MQ and data
queues through JT400.

We haven't considered Websphere and/or Weblogic because of customer's
budget constraint, so I can't give any advices here.

Generally, AS/400 doesn't seem to run Java applications in efficient
way.
I don't know - is it bad JVM implementation, AS/400 architecture flaw...
or maybe just IBM marketing trick :)

If performance is an issue and you can't afford that many CPWs for your
application, I would recommend to run J2EE application on separate
machine (Intel, HP, Sun, whatever Java-friendly) and use AS/400 toolbox
API to access all AS/400 services. Also AS/400 Integrated Netfinity
Server may be well an option.

Otherwise, if for any reason you do want your J2EE on AS/400, I strongly
suggest to do some preliminary performance tests first with whatever
J2EE server you choose.

Regards,
Timur

> -----Original Message-----
> From: java400-l-admin@midrange.com
> [mailto:java400-l-admin@midrange.com] On Behalf Of Stefan Groschupf
> Sent: Sunday, November 03, 2002 8:30 PM
> To: java400-l@midrange.com
> Subject: AS 400 & ejbs
>
>
> Hi,
>
> I'm a newbie in the as 400 and java issue. We have a je22
> application and our customer is interested in running this on
> a as 400. Some one has experience running a ejb application
> server like websphere, weblogic or jboss on a as 400 ?
>
> Thanks for any hints
> Stefan
>
>
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