Hello. I'm using java version "1.7.0_25" OpenJDK Runtime Environment (IcedTea 2.3.12) (7u25-2.3.12-2) OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode) As you see here http://jira.grails.org/browse/GRAILS-10183 it seems that openjdk has a bug that prevents grails to run. Oracle JDK seems to have solved this bug, why openJDK still not?