Dependency error using Solr with Play in IntelliJ - solr

Question

I get this error message when running Play 2.1.2 and Solr 4.4.0 in IntelliJ. I didn't have this before and don't understand where it comes from. Tried cleaning project many times. Thanks in advance for your help!
[info] Resolving com.googlecode.concurrentlinkedhashmap#concurrentlinkedhashmap-
[warn] module not found: org.restlet.jee#org.restlet;2.1.1
[warn] ==== local: tried
[warn] [...]\Play212\repository\local\org.restlet.jee\org.restlet\2.1.1\iv
ys\ivy.xml
[warn] ==== Typesafe Releases Repository: tried
[warn] http://repo.typesafe.com/typesafe/releases/org/restlet/jee/org.restlet/
2.1.1/org.restlet-2.1.1.pom
[warn] ==== Typesafe Snapshots Repository: tried
[warn] http://repo.typesafe.com/typesafe/snapshots/org/restlet/jee/org.restlet
/2.1.1/org.restlet-2.1.1.pom
[warn] ==== public: tried
[warn] http://repo1.maven.org/maven2/org/restlet/jee/org.restlet/2.1.1/org.res
tlet-2.1.1.pom
[warn] module not found: org.restlet.jee#org.restlet.ext.servlet;2.1.1
[warn] ==== local: tried
[warn] [...]\Play212\repository\local\org.restlet.jee\org.restlet.ext.serv
let\2.1.1\ivys\ivy.xml
[warn] ==== Typesafe Releases Repository: tried
[warn] http://repo.typesafe.com/typesafe/releases/org/restlet/jee/org.restlet.
ext.servlet/2.1.1/org.restlet.ext.servlet-2.1.1.pom
[warn] ==== Typesafe Snapshots Repository: tried
[warn] http://repo.typesafe.com/typesafe/snapshots/org/restlet/jee/org.restlet
.ext.servlet/2.1.1/org.restlet.ext.servlet-2.1.1.pom
[warn] ==== public: tried
[warn] http://repo1.maven.org/maven2/org/restlet/jee/org.restlet.ext.servlet/2
.1.1/org.restlet.ext.servlet-2.1.1.pom
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: org.restlet.jee#org.restlet;2.1.1: not found
[warn] :: org.restlet.jee#org.restlet.ext.servlet;2.1.1: not found
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[error] (*:update) sbt.ResolveException: unresolved dependency: org.restlet.jee#
org.restlet;2.1.1: not found
[error] unresolved dependency: org.restlet.jee#org.restlet.ext.servlet;2.1.1: no
t found

Answer 1

It looks like you are trying to import the Restlet framework as an external dependency.
This won't work, because by default, sbt (the build tool that Play uses) only checks Typesafe's repository and Maven central. I could not find Restlet at Maven central, and indeed, on their download page, they write:
The Maven repository for Restlet is accessible from
http://maven.restlet.org and contains all Restlet JARs and third party
dependencies that aren't available in the main public Maven
repository. [...]
This means that you have to tell SBT somehow where to look for the dependency.
A quick look into Play's documentation reveals that you need to add a line to your project/Build.scala:
resolvers += "Restlet Repository" at "http://maven.restlet.org"