Currently I am running eclipse and play (with ~run) at the same time. When I change a file it will be compiled by play and by eclipse.
Is it possible to avoid one of tho
You can turn off Build Automatically
from the Project
menu without losing any of the IDE functionality. Binaries will be built only by Sbt (on the command line).
A detailed guide for setting-up Play 2 with Scala IDE can be found on the Scala IDE website: http://scala-ide.org/docs/tutorials/play20scalaide20/index.html