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Once I run 'sbt compile' on a 2.3 play project, I can't use 'sbt compile' to compile any Play 2.2.x projects anymore. This is the error when I run sbt command.

[info] Loading project definition from /Users/macbookpro/playproject/project
[error] java.lang.NoClassDefFoundError: play/Play$
[error] Use 'last' for the full log.
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?
Jacek Laskowski
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angelokh
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    Would you mind adding `sbt about` and the entire session to the question? – Jacek Laskowski Jun 25 '14 at 10:29
  • See my answer to [Can't Run Activator Template projects Activator UI Failed to load SBT configuration](http://stackoverflow.com/questions/32155681/cant-run-activator-template-projects-activator-ui-failed-to-load-sbt-configurat/34347454#34347454). – Darwin Airola Dec 20 '15 at 11:08

5 Answers5

29

I just had this same issue. In my case I was using Play 2.4, but it's probably the same cause. I had run activator ui in my project directory accidentally. It created a project/play-fork-run.sbt file which is for activator support, but was preventing sbt from working directly. Deleting that file cleared up the issue and I can now use sbt again.

Tim Gautier
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5

Try updating play-fork-run.sbt 

addSbtPlugin("com.typesafe.play" % "sbt-fork-run-plugin" % "2.3.8")

update to

addSbtPlugin("com.typesafe.play" % "sbt-fork-run-plugin" % "2.4.0")

Then project will be able to build.

Harish Singh Bisht
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4

That's interesting issue since it works for me (TM) on Mac OS X 10.9.3 with Java 7.

I downloaded the versions of Play - the latest 2.3.1 and the latest in 2.2.x stream - 2.2.3. With these two versions I've used activator (2.3.1) to create the web application and play for 2.2.3. Both worked well.

When I executed sbt compile in 2.3.1 and then 2.2.3, both commands worked fine, too. It took me some time to have all the dependencies downloaded, but at the end the results were as follows:

jacek:~/sandbox/play231-app
$ sbt compile
[info] Loading project definition from /Users/jacek/sandbox/play231-app/project
[info] Updating {file:/Users/jacek/sandbox/play231-app/project/}play231-app-build...
...
[info] Done updating.
[info] Compiling 5 Scala sources and 1 Java source to /Users/jacek/sandbox/play231-app/target/scala-2.11/classes...
[info] 'compiler-interface' not yet compiled for Scala 2.11.1. Compiling...
[info]   Compilation completed in 14.895 s
[success] Total time: 200 s, completed Jun 25, 2014 1:00:18 PM

And for 2.2.3:

jacek:~/sandbox/play223-app
$ sbt compile
[info] Loading project definition from /Users/jacek/sandbox/play223-app/project
[info] Set current project to play223-app (in build file:/Users/jacek/sandbox/play223-app/)
[info] Updating {file:/Users/jacek/sandbox/play223-app/}play223-app...
...
[info] Done updating.
[info] Compiling 5 Scala sources and 1 Java source to /Users/jacek/sandbox/play223-app/target/scala-2.10/classes...
[info] 'compiler-interface' not yet compiled for Scala 2.10.3. Compiling...
[info]   Compilation completed in 19.626 s
[success] Total time: 45 s, completed Jun 25, 2014 3:15:34 PM

I'm using sbt 0.13.5 installed using homebrew.

$ sbt --version
sbt launcher version 0.13.5

$ java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
Jacek Laskowski
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1

Play 2.3 app is supposed to be built using activator, to ensure proper sbt configuration. Best

cchantep
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1

I had the same issue. Make sure that you are using the java-8 version. I was using java-7, changing to java-8 fixed my problem.

ayush garg
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