Scala run fails after adding dependency to build.sbt - scala

Question

I have a scala project that compiles and can be executed without errors.
I added diameter dependency in my module's build.sbt file:
libraryDependencies ++= Seq(
// some other dependencies here
// then diameter dependencies
"org.mobicents.diameter" % "jdiameter-api" % "1.7.0.106",
"org.mobicents.diameter" % "jdiameter-impl" % "1.7.0.106"
)
The project still compiles but can't run:
[app] $ compile
[success] Total time: 1 s, completed Sep 28, 2016 2:54:36 PM
[app] $ run
SLF4J: Class path contains multiple SLF4J bindings.
--- (Running the application, auto-reloading is enabled) ---
log4j:WARN No appenders could be found for logger (akka.event.slf4j.Slf4jLogger).
log4j:WARN Please initialize the log4j system properly.
java.lang.AbstractMethodError: org.slf4j.impl.Log4jLoggerAdapter.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
at org.slf4j.bridge.SLF4JBridgeHandler.callLocationAwareLogger(SLF4JBridgeHandler.java:221)
at org.slf4j.bridge.SLF4JBridgeHandler.publish(SLF4JBridgeHandler.java:297)
at java.util.logging.Logger.log(Logger.java:738)
at java.util.logging.Logger.doLog(Logger.java:765)
at java.util.logging.Logger.logp(Logger.java:930)
at org.jboss.netty.logging.JdkLogger.debug(JdkLogger.java:36)
at org.jboss.netty.channel.socket.nio.SelectorUtil.<clinit>(SelectorUtil.java:57)
at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.getMaxThreads(NioServerSocketChannelFactory.java:248)
at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.<init>(NioServerSocketChannelFactory.java:115)
at play.core.server.NettyServer.play$core$server$NettyServer$$newBootstrap(NettyServer.scala:46)
at play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:130)
at play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:129)
at scala.Option.map(Option.scala:146)
at play.core.server.NettyServer.<init>(NettyServer.scala:129)
at play.core.server.NettyServerProvider.createServer(NettyServer.scala:200)
at play.core.server.NettyServerProvider.createServer(NettyServer.scala:199)
at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:208)
at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:61)
at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
at play.core.server.DevServerStart$.mainDev(DevServerStart.scala:60)
at play.core.server.DevServerStart$.mainDevHttpMode(DevServerStart.scala:50)
at play.core.server.DevServerStart.mainDevHttpMode(DevServerStart.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at play.runsupport.Reloader$.startDevMode(Reloader.scala:223)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
[trace] Stack trace suppressed: run last app/compile:run for the full output.
[error] (app/compile:run) java.lang.reflect.InvocationTargetException
[error] Total time: 2 s, completed Sep 28, 2016 2:54:42 PM
I don't understand how adding those two dependencies could break the application. I can see the downloaded jars in the .ivy2 cache so the new dependencies were resolved.
How can I fix this?
The full output says:
java.lang.reflect.InvocationTargetException
Many thanks for your help
Update
If I add this dependency only
"org.mobicents.diameter" % "jdiameter-api" % "1.7.0.106"
it works :)
but I need both :(

Answer 1

It looks like both dependencies add their own logger implementations, and they clash at runtime.
Try excluding it from one of the two, for example:
libraryDependencies ++= Seq(
"org.mobicents.diameter" % "jdiameter-api" % "1.7.0.106",
"org.mobicents.diameter" % "jdiameter-impl" % "1.7.0.106" exclude("org.slf4j", "slf4j-jdk14")
)