If your Java application runs out of memory (Tomcat, jBoss, Eclipse…), the following error occurs:
Exception in thread “main” java.lang.OutOfMemoryError: Java heap space
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: