?
Solved

heap size problem!!

Posted on 2007-04-09
11
Medium Priority
?
763 Views
Last Modified: 2008-01-09
Hi experts ..

how to set the heap size for Apache Ant 1.7.0 ??
0
Comment
Question by:DrAske
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 5
11 Comments
 
LVL 92

Expert Comment

by:objects
ID: 18879183
specfy it using the ANT_OPTS env var

http://ant.apache.org/manual/running.html
0
 
LVL 9

Author Comment

by:DrAske
ID: 18879198
you mean I have to add ANT_OPTS to enviroment variable??
could you pleas give me the full syntax I should put ??
0
 
LVL 9

Author Comment

by:DrAske
ID: 18879213
I mean what should I put exactly in the enviroment varaible ?
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 92

Expert Comment

by:objects
ID: 18879359
eg. to set it to 512Mb

ANT_OPS=-Xmx512m
0
 
LVL 92

Expert Comment

by:objects
ID: 18879362
ANT_OPTS=-Xmx512m
0
 
LVL 9

Author Comment

by:DrAske
ID: 18879409
Thank you, I'll try it tomorrow morning and I'll send back the result :o)
0
 
LVL 9

Author Comment

by:DrAske
ID: 18880595
that's doesn't work!!
I've tried to set ANT_OPTS from the command prompt:
set ANT_OPTS = -Xms512m
set ANT_OPTS= -Xmx512m
It has been set successfully, but still get outOfMemory Error !!

What I'm trying to do is writing a JUnit testCase for a method in a class, this method returns the sum of size of 3 ArrayLists in this class, in that method I want to check if the counter == Integer.MAX_VALUE then return Integer.MAX_VALUE!!

To be able to test this method I have to set the three Lists to number of elements it exceeds Integer.MAX_VALUE, so when calling size() method it will return Integer.MAX_VALUE!!

This is the testCase, but It gives me outOfMemory during adding elements to the lists:
public void testCollectionView1Accuracy1() throws Exception {
            for (int i = 0; i < Integer.MAX_VALUE / 2+100; ++i){
                  collection.add(new Character('A'));
            }
            for(int i = 0; i<Integer.MAX_VALUE/2+100; ++i) {
           elementsToAdd.add(new Character('A'));
        }
        collectionView = new CollectionView(collection, elementsToAdd, null);
            assertTrue("size() incorrect.", collectionView.size() == Integer.MAX_VALUE);
    }

what should I do??
0
 
LVL 92

Expert Comment

by:objects
ID: 18880604
that requests a lot motre than 512Mb doesn't it?
why does the test need to add so many elements to the collection?
0
 
LVL 9

Author Comment

by:DrAske
ID: 18880616
The class is wrapper for some collections in java, I'm using it as a view so it allows to filter the collection, makes changes on it without affecting the original collection.

>>why does the test need to add so many elements to the collection?
to check if size() method returns Integer.MAX_VALUE if the sum of the three lists exceeds it!!
in the real-world this wrapper class will hold a large number of records from database, for large systems.
0
 
LVL 92

Accepted Solution

by:
objects earned 2000 total points
ID: 18880666

My calcs show that test needing 4Gb+ !!
Not a terribly friendly test :)
0
 
LVL 9

Author Comment

by:DrAske
ID: 18880669
mmm!! I see, so my laptop won't handle it :o)

thank you very much,
I really appreciate your help :o)

regards,
0

Featured Post

New feature and membership benefit!

New feature! Upgrade and increase expert visibility of your issues with Priority Questions.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
The viewer will learn how to implement Singleton Design Pattern in Java.
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
Suggested Courses
Course of the Month10 days, 10 hours left to enroll

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question