Re: Java exception "java.lang.OutOfMemoryError: Java heap space" when calling ...

Hi Jack,

I am not starting java manually.

I am using Scott K's HSSFR4 program to work work with the POI java classes
to produce an Excel spreadsheet.

So the JVM is started when the first java class is called from the RPG
service program.

This job is running in batch.

So still do not know how to set these values ?

Appreciate your replies.

Don Brown






From: "Jack Woehr" <jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 13/09/2017 10:49 PM
Subject: Re: Java exception "java.lang.OutOfMemoryError: Java heap
space" when calling ...
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Hi Don -- they should be the first options specified after the "java"
command if you are starting your app in the IFS "manually" typing in the
command (or in a shell script).

If you use the green-screen JAVA command then F4 to prompt, F9 for all
options and fill in these:


*Garbage collect initial size . . *DFT 256-240000000 kilobytes
Garbage collect maximum size . . *DFT 256-240000000 kilobytes *

Choose your option and count your zeroes carefully, esp *NOMAX on maximum
size can consume all available storage!!!

On Wed, Sep 13, 2017 at 6:40 AM, Don Brown <DBrown@xxxxxxxxxx> wrote:

Jack, I do not know where to specify these options ?



Don Brown





From: "Jack Woehr" <jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion"

<midrange-l@xxxxxxxxxxxx>

Date: 13/09/2017 10:30 PM
Subject: Re: Java exception "java.lang.OutOfMemoryError: Java

heap

space" when calling ...
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



*java -Xms4g -Xmx4g *... etc

On Wed, Sep 13, 2017 at 5:39 AM, Steve Pitcher <SPitcher@xxxxxxxxxxxx>
wrote:

Check the recovery parameter. You should be able to split the workbook
into multiple sheets to get past the error.



Steve Pitcher
iTech Solutions
Office: (203) 744-7854 Ext. 176
Mobile: (902) 301-0810
http://www.itechsol.com
http://www.iInTheCloud.com


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Don Brown
Sent: Wednesday, September 13, 2017 5:19 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Java exception "java.lang.OutOfMemoryError: Java heap space"

when

calling ...

V7R2 and current on PTF's

Using HSSFR4 with POI version 3.8 creating .xlsx spreadsheet

Getting a java out of memory error.

Spreadsheet contains approximately 1,000,000 records.

I believe I need to increase the default heap size for the JVM but so

far

google has failed me.

Has anyone come across this and solved it ?

Thank you


Don Brown

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