RE: RPG/Java memory leaks? Possible?

["Bob Cozzi" <cozzi@xxxxxxxxx>]

Try recompiling your GETURI with the following keyword on your header
specification and see if it makes a difference>
H THREAD(*SERIALIZE) 


-Bob Cozzi
www.RPGxTools.com
If everything is under control, you are going too slow.
- Mario Andretti


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Brad Stone
Sent: Tuesday, April 12, 2005 5:39 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: RPG/Java memory leaks? Possible?

I've ruled out my application for now as it doesn't alloc
or use any pointers except for those required by APIs (get
host name, etc....)

All variables are defined as DSs or standalone fields.

I imagine the first time the encryption program works
because it creates a new JVM and everything is "fresh".
 But on the subsequent calls I believe it may be doing
something wrong (either at the JVM level or within the app)
that is causing corrupt data.  

You'd think if it were initializing everything on every
call that memory leaks wouldn't be an issue, as each time
the memory in question would simply be reinitialized.

On Tue, 12 Apr 2005 17:31:35 -0500
 "Bob Cozzi" <cozzi@xxxxxxxxx> wrote:
> Hi Brad,
> I don't know how your RPG GETURI program works, but I
> would suspect that
> either it or the encryption program (do they have the
> source for it?) has
> the memory leak. 
> A assume you know the consequences of memory leaks so I
> won't go on, but
> check the RPG GetUri program. It may use ALLOC without a
> corresponding
> DeAlloc, or even worse, it may be using a based variable
> that is based on a
> parameter that is a different size than the based
> variable--this could be
> why it works the first time.
> 
> 

-Bob Cozzi
> www.RPGxTools.com
> If everything is under control, you are going too slow.
> - Mario Andretti
> 
> 
> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
> On Behalf Of Brad Stone
> Sent: Tuesday, April 12, 2005 4:49 PM
> To: RPG programming on the AS400 / iSeries
> Subject: RPG/Java memory leaks? Possible?
> 
> This is a weird one.
> 
> A customer is using my GETURI application to communicate
> with a web service.  This works fine.
> 
> They recently implemented an encryption application to
> encrypt CC numbers.  
> 
> The two applications are not used together at all.
>  Except
> for possibly being called one after another in the same
> job, they do not interact or share data with each other.
> 
> When they call the encryption app alone, it works fine.
> 
> When they call GETURI, then call they encryption app it
> works fine the first time.  Any subsequent calls to the
> encryption app returns bogus data only if they follow a
> call to GETURI.  But GETURI still funtions fine.  This is
> only if done in the same job.  
> 
> Starting a new job (ie signing off, then signing back on)
> will result in the same scenario.  Call GETURI then
> encryption app, works fine.  call GETURI then the
> encryption app again and bogus data is returnd from the
> encryption application.
> 
> The encryption app is an ILE app that calls a Java method
> using JNI.  The ILE app and GETURI both run in the QILE
> activation group.
> 
> We tested changing the AG of the encryption app and that
> had no effect.
> 
> Is it possible that a Java app can have a memory leak
> outside of the AG at the Job level?  This is our first
> guess before diving deeper into this.  But, I'm not sure
> how Java/JNI and AGs work on the iSeries.
> 
> Thanks!
> -- 
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> 
> 
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Bradley V. Stone
BVS.Tools
www.bvstools.com
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