Re: Can the JVM be restarted?

[Barbara Morris <bmorris@xxxxxxxxxx>]

Mike Silvers wrote:
> 
> As far as the JVM, it can not be "restarted".  When an RPG program
> interfaces with a Java program, an instance of the JVM is used.  This
> process, as well as the same instance, is used until either the RPG program
> exits or the programmer uses an API to end the instance.  Once the instance
> is ended within a single RPG program, it can not be started and/or opened
> again.  The "weird errors" would be hard to troubleshoot without more
> information...
> 

The JVM doesn't end with the RPG program.  On V5R1, where you can end
the JVM with the destroyJVM API, you could end the JVM in an RPG
program, and then start another one in the same program.  Or you could
end your first program (LR or not, makes no difference), and call
another program to use the same JVM.

One exception: on V5R1, ending an activation group ends the JVM, so if
your program is a *NEW AG program, the JVM does end when the program
ends.

On V5R2, ending an AG doesn't end the JVM; you have one JVM for the
lifetime of your job.