Setting Java heap space under Maven 2 on Windows
I get this message during build of my project
java.lang.OutOfMemoryError: Java heap space
How do I increase heap space, I've got 8Gb or RAM its impossible that maven consumed that much, I found this http://vikashazrati.wordpress.com/2007/07/26/quicktip-how-to-increase-the-java-heap-memory-for-maven-2-on-linux/ how to do it on linux, but I'm on windows 7. How can I change java heap space under windows ?
Answer
The environment variable to set is MAVEN_OPTS, for example MAVEN_OPTS=-Xmx1024m. The maxmem configuration in the pom only applies when you set the compiler plugin to fork javac into a new JVM. Otherwise the plugin runs inside the same VM as Maven and thus within the memory passed on the command line via the MAVEN_OPTS.
To set MAVEN_OPTS under Windows 7:
- Right click on My Computer and select Properties (keyboard shortcut press Windows + Pause/Break)
- Click the Advanced System Settings link located in the left navigation of System Properties to display the Advanced System Properties
- Go to the Advanced tab and click the Environment Variables button located at the bottom of the Advanced System Properties configuration window
- Create a New user variable, set the Variable name to MAVEN_OPTS and set the Variable value to
-Xmx1024m(or more)
Open a new command window and run mvn.