Re: Interesting issue with RPG/Java direct calls

[Barbara Morris <bmorris@xxxxxxxxxx>]

Mike Silvers wrote:
>
> I have run into an interesting issue with a direct call to Java from an RPG
> program.  After doing multiple calls within the same job, I ran into a
> StringIndexOutOfBoundsException during one of the calls.
> ...

Mike, are you ending the JVM between calls?  Even if you're not
explicitly ending the JVM, if you are on V5R1, ending any activation
group will cause the JVM to end.  It's not really supported to end the
JVM and start it again, so subsequent calls may or may not work well.
(In V5R2, ending an activation-group doesn't cause the JVM to end, and
it's not supported to explicitly destroy the JVM.)

Aside from ending the JVM, there are other ways to misuse Java.  Are you
freeing your Java resources?  If you end your RPG program with LR on,
and you don't free all your Java objects, eventually you will run into
memory problems.  If you've only read the V5R1 ILE RPG Programmer's
Guide section on calling Java, read the V5R2 version too - there's a bit
more information on ways that Java objects can be lost through incorrect
programming.