Error starting handlers - DynamicScope issue

[mgoel1190]

Trying to return json response from scala servlet using code:

package com.affinio.api

import org.json4s.{DefaultFormats, Formats}
import org.scalatra.ScalatraServlet
import org.scalatra.json.JacksonJsonSupport

class MyServlet extends ScalatraServlet with JacksonJsonSupport {
protected implicit val jsonFormats: Formats = DefaultFormats
get("/") {
contentType = formats("json")
Message("Hello", "World")
}
}
private case class Message(greeting: String, to: String)

But it fails with:
java.lang.AbstractMethodError: com.affinio.api.MyServlet.org$scalatra$DynamicScope$setter$org$scalatra$DynamicScope$$dynamicRequest_$eq(Lscala/util/DynamicVariable;)V
at org.scalatra.DynamicScope$class.$init$(DynamicScope.scala:47)
at com.affinio.api.MyServlet.(MyServlet.scala:6)
at ScalatraBootstrap.init(ScalatraBootstrap.scala:8)
at org.scalatra.servlet.ScalatraListener.configureCycleClass(ScalatraListener.scala:66)
at org.scalatra.servlet.ScalatraListener.contextInitialized(ScalatraListener.scala:22)
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:540)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:371)
at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:307)
at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:203)
at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
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:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)

pom.xml dependency:

   <dependency>
        <groupId>org.scalatra</groupId>
       <artifactId>scalatra_2.11</artifactId>
       <version>2.4.0.RC1</version>
    </dependency>
    <dependency>
        <groupId>org.scalatra</groupId>
        <artifactId>scalatra-scalate_2.11</artifactId>
        <version>2.4.0.RC1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.scalatra/scalatra-json -->
    <dependency>
        <groupId>org.scalatra</groupId>
        <artifactId>scalatra-json_2.11</artifactId>
        <version>2.4.0.RC1</version>
    </dependency>

    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-webapp</artifactId>
        <version>9.4.8.v20171121</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty.orbit</groupId>
        <artifactId>javax.servlet</artifactId>
        <version>3.0.0.v201112011016</version>
    </dependency>

    <dependency>
        <groupId>org.json4s</groupId>
        <artifactId>json4s-jackson_2.11</artifactId>
        <version>3.3.0.RC1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.json4s/json4s-core -->
    <dependency>
        <groupId>org.json4s</groupId>
        <artifactId>json4s-core_2.11</artifactId>
        <version>3.3.0.RC1</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.eclipse.jetty/jetty-maven-plugin -->
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-maven-plugin</artifactId>
        <version>9.4.8.v20171121</version>
    </dependency>

[magnolia-k]

The version you are using is outdated, did you try it with the latest version?

It seems to work with the latest combination of Scalatra and json4s.