Re: is it possible to start multiple JVMs in different activation groups in the same job?

Not that I have heard.

The one JVM per job was _added_ as a limitation after the early disasters that arose when multiple JVMs were allowed to start.

Other than batch, as you mentioned, the normal approach to this propblem is to have never ending service jobs that interact via data queues or similar. You have one set up for each "task" and it has an associated classpath as required for the task(s) it performs. These days I might seriously consider using an internal REST web service to provide such functionality.

There is an open source "engine" that provindes this funcionality ready built but I'm darnewd if I can recall the name and don't have time to look it up right now. Hopefull someone else will recall it.


Jon P.

On May 6, 2024, at 1:15 PM, Ali Ekinci via MIDRANGE-L <midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

Using JNI methods to create JVM. I am aware of the limitation (at least it was the case) that a single IBMi job allows only one JVM and restart is not possible when it ends.
A third-party application is making java calls and requires java classpath to be changed. Once internal processes starts JVM, then third-part application fails. Or vice versa when the third-part app is executed first.
Obviously, a workaround is to submit the third-party action to a batch job.

I thought that potentially IBM eased the "one JVM per job" restriction by allowing different JVMs in each activation group.
Is there any change in that area?

Thanks for any help in advance.
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