I tried to install Groovy and Grails support by checking both "Groovy Eclipse" and "Grails Support" in the Extensions tab and got the following error:
Problems occurred while performing installation: The following connectors are not available: Groovy Eclipse (id=org.codehaus.groovy.eclipse.feature.feature.gr oup, site=http://dist.springsource.com/release/TOOLS/third-party/groovy-grails/e3.6/)
If I install only Groovy Eclipse, it installs fine.
Simplicity is prerequisite for reliability. — Edsger W. Dijkstra