Hi guys im getting java heap spce error. I Know why it arises.

This can have two reasons:

* Your Java application has a memory leak. There are tools like YourKit Java Profiler that help you to identify such leaks.
* Your Java application really needs a lot of memory (more than 128 MB by default!). In this case the Java heap size can be increased using the following runtime parameters:

java -Xms<initial heap size> -Xmx<maximum heap size>

Defaults are:

java -Xms32m -Xmx128m

You can set this either in the Java Control Panel or on the command line, depending on the environment you run your application.

But can anyone tell me where to make changes to increased size of heap space?

The location of the argument that sets the memory arguments depends upon the application server and the OS that you are using. E.g. In weblogic, the memory arguments may be set as:-

set MEM_ARGS=-Xms512m -Xmx1024m

This can be done in the setDomainEnv.cmd file in the domains folder.

In the JBoss, the same may be done in the run.bat file in the bin folder.