OutOfMemoryException when running mvn

MAVEN_OPTS

The MAVEN_OPTS environment variable defines options for the JVM that executes Maven.

Set it according to your platform, i.e. export MAVEN_OPTS=... on unixish systems or set MAVEN_OPTS=... on Windows.

Increase JVM memory if needed

If getting an OutOfMemoryException when running mvn, try setting

MAVEN_OPTS="-Xmx256M"

to allocate 256MB of RAM to Maven