Playframework: cannot override sbt dependency - scala

Question

Here is a minimal reproducible example:
echo '
libraryDependencies += "org.apache.jena" % "apache-jena-libs" % "3.17.0" ;
lazy val testPlay = (project in file(".")) .enablePlugins(PlayScala)
' > build.sbt ;
mkdir project ;
echo 'addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.8.5")'
> project/plugins.sbt ;
sbt run
I have a dependency to a Java module (Apache Jena), that specifies jackson-core 2.11.3 , while latest Play is at 2.10.4 . Play does not start in dev mode:
JsonMappingException: Scala module 2.10.4 requires Jackson Databind version >= 2.10.0 and < 2.11.0.
I tried this:
dependencyOverrides += "com.fasterxml.jackson.core" % "jackson-databind" % "2.10.4"
but it is not taken in account, checking with show fullClasspath and dependencyTree .
Also tried excludeDependencies in two ways, specifying 2.10.4 or 2.11.3 . My understanding is that
a Java dependency cannot be changed by SBT excludeDependencies
function play.runsupport.Reloader.startDevMode() is not
affected by main SBT configuration, because it is part of the Play
plugin ; indeed the class Reloader is not in play-server_2.12-2.8.5.jar
So what kind of hack could I try?
The sbt config.
https://github.com/jmvanel/semantic_forms/blob/master/scala/project/Common.scala#L44
The stack trace:
[error] com.fasterxml.jackson.databind.JsonMappingException: Scala module 2.10.4 requires Jackson Databind version >= 2.10.0 and < 2.11.0
[error] at com.fasterxml.jackson.module.scala.JacksonModule.setupModule(JacksonModule.scala:61)
[error] at com.fasterxml.jackson.module.scala.JacksonModule.setupModule$(JacksonModule.scala:46)
[error] at com.fasterxml.jackson.module.scala.DefaultScalaModule.setupModule(DefaultScalaModule.scala:17)
[error] at com.fasterxml.jackson.databind.ObjectMapper.registerModule(ObjectMapper.java:819)
[error] at akka.serialization.jackson.JacksonObjectMapperProvider$.$anonfun$configureObjectMapperModules$4(JacksonObjectMapperProvider.scala:223)
[error] at akka.serialization.jackson.JacksonObjectMapperProvider$.$anonfun$configureObjectMapperModules$4$adapted(JacksonObjectMapperProvider.scala:222)
[error] at scala.collection.immutable.List.foreach(List.scala:431)
[error] at akka.serialization.jackson.JacksonObjectMapperProvider$.configureObjectMapperModules(JacksonObjectMapperProvider.scala:222)
...
[error] at akka.actor.ActorSystem$.apply(ActorSystem.scala:290)
[error] at play.core.server.DevServerStart$.$anonfun$mainDev$1(DevServerStart.scala:248)
[error] at play.utils.Threads$.withContextClassLoader(Threads.scala:22)
[error] at play.core.server.DevServerStart$.mainDev(DevServerStart.scala:76)

Answer 1

You can force a dependency with:
libraryDependencies += "com.fasterxml.jackson.core" % "jackson-databind" % "2.10.4" force()
Another option you have is to exclude dependency:
libraryDependencies += "org.apache.jena" % "apache-jena-libs" % "3.17.0" exclude("com.fasterxml.jackson.core", "jackson-databind")