Problem

When you try to execute the maven comand mvn clean install shows the following message error: 

...

Exception in thread "main" Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"

Reason

There is not enough memory to execute all the steps necessary to the build (integration tests, start the jetty server etc.).

Solution

Creation of a environment variable MAVEN_OPTS with the value -Xmx1024m -XX:MaxPermSize=512m

Related Links

Maven throws “java.lang.OutOfMemoryError”

http://stackoverflow.com/questions/1920059/maven-throws-java-lang-outofmemoryerror

Setting Java heap space under Maven 2 on Windows

http://stackoverflow.com/questions/2819853/setting-java-heap-space-under-maven-2-on-windows