How to run a spray server on heroku with Scala 2.10?

Question

I've created a Spray app with a simple REST service. I've followed a variation of the instructions provided by heroku. Variations:

• used sbt.version=0.12.0
• used Build.scala instead of build.sbt
• used spray instead of finagle

Long story short, I've got it running locally with little problems, also using foreman. Then I tried to push to heroku and the build fails horribly with variating unresolved dependencies caused by 503's, for example:

      http://s3pository.heroku.com/maven-central/net/java/dev/jna/jna/3.2.3/jna-3.2.3.jar

            ::::::::::::::::::::::::::::::::::::::::::::::

            ::              FAILED DOWNLOADS            ::

            :: ^ see resolution messages for details  ^ ::

            ::::::::::::::::::::::::::::::::::::::::::::::

            :: net.java.dev.jna#jna;3.2.3!jna.jar

            ::::::::::::::::::::::::::::::::::::::::::::::


   :::: ERRORS
    SERVER ERROR: Service Unavailable url=http://s3pository.heroku.com/maven-central/net/java/dev/jna/jna/3.2.3/jna-3.2.3.pom.sha1

What's the cause of this and what can I do to get this running?

Answer 1

This was/is an issue with Heroku. Symptoms to know that it's not your fault:

• trivial dependencies like jna fail to download intermittently
• dependency resolution is dead slow

Go out and do something fun, or try a different PaaS cloud, and then try again after a few hours. In all likelihood things are back up and running by then.