Exception in thread "main" java.lang.OutOfMemoryError: Java heap space on eclipse

Question

I am trying to execute this program using fork and join framework. When I feed a JPEG image of smaller size to this program it works fine, but when I give the image of size more than 4 MB it throws below exception:

****Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at ForkBlur.blur(ForkBlur.java:120)
    at ForkBlur.main(ForkBlur.java:110)****

I am using eclipse Helios IDE.

I want it to work for larger images of size more than 50 MB

It clears says what the error is.So what do you want actually? — Renjith, Jan 17 '13 at 17:56
What is the question? Either increase heap space or analyze the code to find a way to reduce the memory usage. — MrSmith42, Jan 17 '13 at 17:57
What matters is the size of the image uncompressed. This can be up to 100x larger. I suggest increasing the maximum memory you give the running program. — Peter Lawrey, Jan 17 '13 at 17:57
You need to set the Java runtime parameters to specify a larger heap size in the Run options for your project — antlersoft, Jan 17 '13 at 17:58
Try adding `-Xmx1g` to the VM/command line options for your running program. — Peter Lawrey, Jan 17 '13 at 18:03
http://stackoverflow.com/questions/8600972/increasing-heap-space-in-eclipse-java-lang-outofmemoryerror — Werner Kvalem Vesterås, Jan 17 '13 at 18:03

score 7 · Accepted Answer · answered Jan 17 '13 at 18:11

7

It worked fine for me .

Right click on project which you want to run . Run As -> Run configuration ->Arguments .

Then in VM arguments:

-Xmx1g

answered Jan 17 '13 at 18:11

Voila

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Scorpion · Answer 2 · 2013-01-17T18:09:12.943

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You need to specify a bigger heap size when you run the program.

You can do it via eclipse if that's your preferred tool. You can right click on the file containing the main method, choose the option "Run As" - this would open up a dialog where you can set up host of command line options (look for arguments section).

The command line option to configure the maximum heap size is Xmx; an example would be Xmx 2g to set the maximum heap size to 2 gb.

edited Jan 17 '13 at 18:09

answered Jan 17 '13 at 18:01

Scorpion

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It would be nice to include how, for those who don't know. – Gaffi Jan 17 '13 at 18:02
Can you tell me the steps to do that ? – Voila Jan 17 '13 at 18:02
I am just completing the answer, it takes me a few seconds to complete the answer. I know it takes lesser time to down vote but still would request to control the urge :-) – Scorpion Jan 17 '13 at 18:03

score 2 · Answer 3 · answered Jan 17 '13 at 18:05

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You'll need to tell the JVM to allow for more memory for your program. If running the program from the command line, you would use the -mx option to specify how much memory the JVM is allowed to use.

For example, to allow for 128MB of memory, you would do:

java -mx128M MyClass

If running from Eclipse Helios, do this:

Right click on the project and go to properties.
Click on Run/Debug Settings.
Choose your run configuration and click Edit or click New to create one using the Java Application configuration type.
On the Arguments tab, put -mx128M in the VM arguments box.

answered Jan 17 '13 at 18:05

Eric Petroelje

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AFAIK, it is Xmx, the command line option, mx is probably a typo? – Scorpion Jan 17 '13 at 18:08
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@Scorpion - The `mx` option is now a standard java option and doesn't require the leading `X` anymore. Although `-Xmx` will still work, and may be required if you are using an older version of Java. – Eric Petroelje Jan 17 '13 at 18:09

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space on eclipse

3 Answers3