title: ClassCaseException org.slf4j.impl.SimpleLoggerFactory cannot be cast to ch.qos.logback.classic.LoggerContext
body: <blockquote>
    <p>A type incompatibility occurred while executing com.cerner.clinicaldev:gatling-plugin:1.0.0-SNAPSHOT:run: org.slf4j.impl.SimpleLoggerFactory cannot be cast to ch.qos.logback.classic.LoggerContext</p>
  </blockquote>
  
  <p>I am writing a maven mojo that spins up a Jetty implementation and runs Gatling programmatically. I have tried excluding slf4j from the io.gatling:gatling-app:2.2.5 and including in the maven-enforcer-plugin as a banned dependency all no no avail.</p>
  
  <p>I cannot see anywhere else in the dependency tree that includes it;</p>
  
  <pre><code>+- io.gatling:gatling-app:jar:2.2.5:compile
  |  +- io.gatling:gatling-core:jar:2.2.5:compile
  |  |  +- io.gatling:gatling-commons:jar:2.2.5:compile
  |  |  |  +- com.typesafe:config:jar:1.3.1:compile
  |  |  |  +- com.dongxiguo:fastring_2.11:jar:0.2.4:compile
  |  |  |  +- com.softwaremill.quicklens:quicklens_2.11:jar:1.4.8:compile
  |  |  |  +- org.asynchttpclient:async-http-client-netty-utils:jar:2.0.29:compile
  |  |  |  +- com.typesafe.scala-logging:scala-logging_2.11:jar:3.5.0:compile
  |  |  |  \- ch.qos.logback:logback-classic:jar:1.1.7:compile
  |  |  |     \- ch.qos.logback:logback-core:jar:1.1.7:compile
  |  |  +- com.typesafe.akka:akka-actor_2.11:jar:2.4.12:compile
  |  |  +- com.typesafe.akka:akka-slf4j_2.11:jar:2.4.12:compile
  |  |  +- com.fasterxml.jackson.dataformat:jackson-dataformat-csv:jar:2.8.4:compile
  |  |  |  +- com.fasterxml.jackson.core:jackson-core:jar:2.8.4:compile
  |  |  |  \- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.0:compile
  |  |  +- me.chrons:boopickle_2.11:jar:1.2.4:compile
  |  |  +- org.scala-lang.modules:scala-java8-compat_2.11:jar:0.8.0-RC7:compile
  |  |  +- com.github.ben-manes.caffeine:caffeine:jar:2.3.5:compile
  |  |  +- com.github.scopt:scopt_2.11:jar:3.5.0:compile
  |  |  +- io.gatling:jsonpath_2.11:jar:0.6.8:compile
  |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.4:compile
  |  |  +- io.advantageous.boon:boon-json:jar:0.6.6:compile
  |  |  |  \- io.advantageous.boon:boon-reflekt:jar:0.6.6:compile
  |  |  +- net.sf.saxon:Saxon-HE:jar:9.7.0-10:compile
  |  |  \- org.jodd:jodd-lagarto:jar:3.8.0:compile
  |  |     +- org.jodd:jodd-core:jar:3.8.0:compile
  |  |     \- org.jodd:jodd-log:jar:3.8.0:compile
  |  +- io.gatling:gatling-http:jar:2.2.5:compile
  |  |  +- org.asynchttpclient:async-http-client:jar:2.0.29:compile
  |  |  |  +- io.netty:netty-codec-http:jar:4.0.44.Final:compile
  |  |  |  |  +- io.netty:netty-codec:jar:4.0.44.Final:compile
  |  |  |  |  \- io.netty:netty-handler:jar:4.0.44.Final:compile
  |  |  |  +- org.asynchttpclient:netty-resolver-dns:jar:2.0.29:compile
  |  |  |  |  +- org.asynchttpclient:netty-resolver:jar:2.0.29:compile
  |  |  |  |  \- org.asynchttpclient:netty-codec-dns:jar:2.0.29:compile
  |  |  |  +- org.reactivestreams:reactive-streams:jar:1.0.0:compile
  |  |  |  +- com.typesafe.netty:netty-reactive-streams:jar:1.0.8:compile
  |  |  |  \- org.javassist:javassist:jar:3.21.0-GA:compile
  |  |  \- io.netty:netty-transport-native-epoll:jar:linux-x86_64:4.0.44.Final:compile
  |  |     +- io.netty:netty-common:jar:4.0.44.Final:compile
  |  |     +- io.netty:netty-buffer:jar:4.0.44.Final:compile
  |  |     \- io.netty:netty-transport:jar:4.0.44.Final:compile
  |  +- io.gatling:gatling-jms:jar:2.2.5:compile
  |  |  \- org.apache.geronimo.specs:geronimo-jms_1.1_spec:jar:1.1.1:compile
  |  +- io.gatling:gatling-jdbc:jar:2.2.5:compile
  |  +- io.gatling:gatling-redis:jar:2.2.5:compile
  |  |  \- net.debasishg:redisclient_2.11:jar:3.2:compile
  |  +- io.gatling:gatling-metrics:jar:2.2.5:compile
  |  |  \- org.hdrhistogram:HdrHistogram:jar:2.1.9:compile
  |  \- io.gatling:gatling-charts:jar:2.2.5:compile
  |     \- com.tdunning:t-digest:jar:3.1:compile
  +- io.spray:spray-json_2.11:jar:1.3.3:compile
  +- javax.ws.rs:javax.ws.rs-api:jar:2.0.1:compile
  +- javax.ws.rs:jsr311-api:jar:1.1.1:compile
  +- org.apache.maven:maven-plugin-api:jar:3.5.0:compile
  |  +- org.apache.maven:maven-model:jar:3.5.0:compile
  |  |  +- org.codehaus.plexus:plexus-utils:jar:3.0.24:compile
  |  |  \- org.apache.commons:commons-lang3:jar:3.5:compile
  |  +- org.apache.maven:maven-artifact:jar:3.5.0:compile
  |  \- org.eclipse.sisu:org.eclipse.sisu.plexus:jar:0.3.3:compile
  |     +- javax.enterprise:cdi-api:jar:1.0:compile
  |     |  +- javax.annotation:jsr250-api:jar:1.0:compile
  |     |  \- javax.inject:javax.inject:jar:1:compile
  |     +- org.eclipse.sisu:org.eclipse.sisu.inject:jar:0.3.3:compile
  |     +- org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile
  |     \- org.codehaus.plexus:plexus-classworlds:jar:2.5.2:compile
  +- org.eclipse.jetty.aggregate:jetty-all-server:jar:8.2.0.v20160908:compile
  |  +- org.eclipse.jetty.orbit:javax.servlet:jar:3.0.0.v201112011016:compile
  |  +- org.eclipse.jetty.orbit:javax.security.auth.message:jar:1.0.0.v201108011116:compile
  |  +- org.eclipse.jetty.orbit:javax.mail.glassfish:jar:1.4.1.v201005082020:compile
  |  +- org.eclipse.jetty.orbit:javax.activation:jar:1.1.0.v201105071233:compile
  |  \- org.eclipse.jetty.orbit:javax.annotation:jar:1.1.0.v201108011116:compile
  +- org.scala-lang:scala-library:jar:2.11.8:compile
  +- org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.5:provided
  +- org.scalatest:scalatest_2.11:jar:3.0.3:test
  |  +- org.scalactic:scalactic_2.11:jar:3.0.3:test
  |  +- org.scala-lang:scala-reflect:jar:2.11.8:compile
  |  +- org.scala-lang.modules:scala-xml_2.11:jar:1.0.5:compile
  |  \- org.scala-lang.modules:scala-parser-combinators_2.11:jar:1.0.4:compile
  \- org.specs2:specs2-core_2.11:jar:2.5:test
     \- org.specs2:specs2-matcher_2.11:jar:2.5:test
        \- org.specs2:specs2-common_2.11:jar:2.5:test
           +- org.scalaz:scalaz-core_2.11:jar:7.2.0:test
           \- org.scalaz:scalaz-concurrent_2.11:jar:7.2.0:test
              \- org.scalaz:scalaz-effect_2.11:jar:7.2.0:test
  </code></pre>
  
  <p>I have been trying for 3 days to resolve this. </p>
  
  <p>Just to add...this is JDK1.8 and Maven 3.3.9.</p>
  
  <p>Help!?!</p>
  
  <p>EDIT::</p>
  
  <p>If I explicitly instantiate a logger at the head of my mojo class I get the following stack trace:</p>
  
  <p>com.google.inject.ProvisionException: Unable to provision, see the following errors:</p>
  
  <blockquote>
    <p>1) Error injecting constructor, java.lang.ClassCastException:
    org.slf4j.impl.SimpleLoggerFactory cannot be cast to
    ch.qos.logback.classic.LoggerContext   at
    com.cerner.clinicaldev.gatlingplugin.GatlingPlugin.(Unknown
    Source)   while locating
    com.cerner.clinicaldev.gatlingplugin.GatlingPlugin</p>
    
    <p>1 error   at
    com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1025)
      at
    com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1051)
      at
    org.eclipse.sisu.space.AbstractDeferredClass.get(AbstractDeferredClass.java:48)
      at
    com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
      at
    com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:53)
      at
    com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:65)
      at
    com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115)
      at
    org.eclipse.sisu.bean.BeanScheduler$Activator.onProvision(BeanScheduler.java:176)
      at
    com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:126)
      at
    com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:68)
      at
    com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:63)
      at
    com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
      at
    com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:1016)
      at
    com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
      at
    com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1012)
      at org.eclipse.sisu.inject.Guice4$1.get(Guice4.java:162)    at
    org.eclipse.sisu.inject.LazyBeanEntry.getValue(LazyBeanEntry.java:81)
      at
    org.eclipse.sisu.plexus.LazyPlexusBean.getValue(LazyPlexusBean.java:51)
      at
    org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263)
      at
    org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255)
      at
    org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:517)
      at
    org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:121)
      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)
    Caused by: java.lang.ClassCastException:
    org.slf4j.impl.SimpleLoggerFactory cannot be cast to
    ch.qos.logback.classic.LoggerContext  at
    com.cerner.clinicaldev.gatlingplugin.GatlingPlugin.(GatlingPlugin.scala:20)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
    Method)   at
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
      at
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
      at
    com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:86)
      at
    com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:105)
      at
    com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32)
      at
    com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:89)
      at
    com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115)
      at
    com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:133)
      at
    com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:68)
      at
    com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:87)
      at
    com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:267)
      at
    com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:1016)
      at
    com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103)
      at
    com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1012)</p>
  </blockquote>