Accessing jBoss 4.0.4 with Java 1.3 client

[viktor]

Hi there,

Can anybody tell me whether it is possible to have Java 1.3 client to JBoss 4.0.4??
When using INITIAL_CONTEXT_FACTORY we specify "org.jnp.interfaces.NamingContextFactory" and this means that some jboss client side jars are required.

Now, when using client jars from jboss 4 we get "unsupported JVM" complain (as jboss 4 is built for Java 1.4 or newer)

When using client jars from jBoss 3.2.3 we getting serialisation problems on JBoss specific classes.

Can it work at all?

Thanks,

Viktor

[jaikiran]

Have a look at:

http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossVsJavaJDKVersionMatrix

[viktor]

well, I believe this matrix is for the server side.
I assume that client Java version is a different story.
We have upgraded to jBoss 4.04 from 3.2.3 but we still have some old client which must run on Java 1.3. I was assuming that version of client JVM is not tightly linked to the version of the server/server JVM.
Probably I was wrong?

[starksm64]

Server side jdk requirements dictate the client side requirements as well.

[marlig]

Hi,

I don't think that this is such an unusual case in a company environment. We are right now running into the problem that we want to upgrade to JBoss 4.0.4, but that we have to support client applications which are using JDK 1.3 and which definitely cannot upgrade the JDK right now.

So I would be very interested in any ideas how to solve this problem!

The constraints I see are that the client apps cannot use the new jbossall-client.jar, since they get an "unknown major.minor version" error. And if they use the old client JAR, they do not know the new SingleRetryInterceptor class.

The Wiki (http://wiki.jboss.org/wiki/Wiki.jsp?page=RetryInterceptor) shows how to change the RetryInterceptor, maybe one could use this to install the old RetryInterceptor? But if this works, what about serialization? Maybe I'm just running into the next problem thereafter?

Though there is another Wiki page (http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossVersionCompatibilityMatrix) showing some options about serialization compatibility. Would this solve the problem finally, or is the next problem just lurking behind?

I could, of course, always install an old JBoss (3.2.x) and connect to the new JBoss using HTTP or similar. But then Good Bye to performance and fail-over. :-(

Thanks a lot for any help!
Martin

[marlig]

I think we found the solution to this problem. It is a combination of using the jbossall-client.jar from JBoss 3.2.8SP1, the VM argument
-Dorg.jboss.j2ee.Serialization for the client and the installation of the old RetryInterceptor. Now the JDK 1.3 client can access JBoss 4 without problems. :-)

Greetings
Martin