build.sbt

name := "test"

version := "0.1"

scalaVersion := "2.12.3"

fork in run := true

libraryDependencies += "org.apache.logging.log4j" % "log4j-api" % "2.8.2"
libraryDependencies += "org.apache.logging.log4j" % "log4j-core" % "2.8.2"
libraryDependencies += "org.apache.logging.log4j" % "log4j-jul" % "2.8.2"
libraryDependencies += "com.lmax" % "disruptor" % "3.3.0" //required dependency of log4j async logger

libraryDependencies += "org.scala-lang" % "scala-compiler" % "2.12.3" //comment out to run smoothly

log4jconfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="DEBUG">
</Configuration>

output.txt

[info] 2017-09-11 15:39:27,671 main DEBUG Initializing configuration XmlConfiguration[location=/Users/nestorcn/Desktop/Test/target/scala-2.12/classes/log4jconfig.xml]
[info] 2017-09-11 15:39:27,684 main DEBUG Installed script engines
[info] 2017-09-11 15:39:36,716 main DEBUG Scala REPL Version: 2.0, Language: Scala, Threading: Not Thread Safe, Compile: true, Names: {scala}
[info] 2017-09-11 15:39:36,838 main WARN JNDI lookup class is not available because this JRE does not support JNDI. JNDI string lookups will not be available, continuing configuration. Ignoring java.lang.ClassCastException: Cannot cast org.apache.logging.log4j.core.lookup.JndiLookup to org.apache.logging.log4j.core.lookup.StrLookup
[info] 2017-09-11 15:39:36,842 main WARN JMX runtime input lookup class is not available because this JRE does not support JMX. JMX lookups will not be available, continuing configuration. Ignoring java.lang.ClassCastException: Cannot cast org.apache.logging.log4j.core.lookup.JmxRuntimeInputArgumentsLookup to org.apache.logging.log4j.core.lookup.StrLookup
[info] 2017-09-11 15:39:36,844 main DEBUG Not in a ServletContext environment, thus not loading WebLookup plugin.
[info] 2017-09-11 15:39:36,845 main DEBUG PluginManager 'Converter' found 41 plugins
[info] 2017-09-11 15:39:36,846 main DEBUG Starting OutputStreamManager SYSTEM_OUT.false.false-2
[info] 2017-09-11 15:39:36,849 main DEBUG [AsyncContext@3006bfb] Starting AsyncLogger disruptor for this context with ringbufferSize=4096, waitStrategy=TimeoutBlockingWaitStrategy, exceptionHandler=org.apache.logging.log4j.core.async.AsyncLoggerDefaultExceptionHandler@4b9f7edc...
[info] 2017-09-11 15:39:36,855 main DEBUG Starting LoggerContext[name=AsyncContext@3006bfb, org.apache.logging.log4j.core.async.AsyncLoggerContext@22c29aa8]...
[info] 2017-09-11 15:39:36,859 main DEBUG Reconfiguration started for context[name=AsyncContext@3006bfb] at URI null (org.apache.logging.log4j.core.async.AsyncLoggerContext@22c29aa8) with optional ClassLoader: null
[info] 2017-09-11 15:39:36,865 main DEBUG Using configurationFactory org.apache.logging.log4j.core.config.ConfigurationFactory$Factory@129b69b2
[info] 2017-09-11 15:39:36,867 main WARN JNDI lookup class is not available because this JRE does not support JNDI. JNDI string lookups will not be available, continuing configuration. Ignoring java.lang.ClassCastException: Cannot cast org.apache.logging.log4j.core.lookup.JndiLookup to org.apache.logging.log4j.core.lookup.StrLookup
[info] 2017-09-11 15:39:36,869 main WARN JMX runtime input lookup class is not available because this JRE does not support JMX. JMX lookups will not be available, continuing configuration. Ignoring java.lang.ClassCastException: Cannot cast org.apache.logging.log4j.core.lookup.JmxRuntimeInputArgumentsLookup to org.apache.logging.log4j.core.lookup.StrLookup
[info] 2017-09-11 15:39:36,873 main DEBUG Not in a ServletContext environment, thus not loading WebLookup plugin.
[info] 2017-09-11 15:39:36,884 main DEBUG Initializing configuration XmlConfiguration[location=/Users/nestorcn/Desktop/Test/target/scala-2.12/classes/log4jconfig.xml]
[info] 2017-09-11 15:39:36,989 main DEBUG Installed script engines
[error] Exception in thread "main" java.lang.ExceptionInInitializerError
[error] 	at jdk.nashorn.internal.lookup.MethodHandleFactory$StandardMethodHandleFunctionality.<init>(MethodHandleFactory.java:325)
[error] 	at jdk.nashorn.internal.lookup.MethodHandleFactory.<clinit>(MethodHandleFactory.java:103)
[error] 	at jdk.nashorn.internal.runtime.Context.initLoggers(Context.java:1404)
[error] 	at jdk.nashorn.internal.runtime.Context.<init>(Context.java:549)
[error] 	at jdk.nashorn.internal.runtime.Context.<init>(Context.java:466)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:129)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:125)
[error] 	at java.security.AccessController.doPrivileged(Native Method)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine.<init>(NashornScriptEngine.java:125)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngineFactory.getScriptEngine(NashornScriptEngineFactory.java:148)
[error] 	at org.apache.logging.log4j.core.script.ScriptManager.<init>(ScriptManager.java:96)
[error] 	at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:214)
[error] 	at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:244)
[error] 	at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:545)
[error] 	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:617)
[error] 	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:634)
[error] 	at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:229)
[error] 	at org.apache.logging.log4j.core.async.AsyncLoggerContext.start(AsyncLoggerContext.java:76)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
[error] 	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
[error] 	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:122)
[error] 	at org.apache.logging.log4j.jul.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:34)
[error] 	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
[error] 	at org.apache.logging.log4j.jul.LogManager.getLogger(LogManager.java:89)
[error] 	at java.util.logging.LogManager.demandLogger(LogManager.java:551)
[error] 	at java.util.logging.Logger.demandLogger(Logger.java:455)
[error] 	at java.util.logging.Logger.getLogger(Logger.java:502)
[error] 	at com.lmax.disruptor.FatalExceptionHandler.<clinit>(FatalExceptionHandler.java:27)
[error] 	at com.lmax.disruptor.BatchEventProcessor.<init>(BatchEventProcessor.java:34)
[error] 	at com.lmax.disruptor.dsl.Disruptor.createEventProcessors(Disruptor.java:433)
[error] 	at com.lmax.disruptor.dsl.Disruptor.handleEventsWith(Disruptor.java:114)
[error] 	at org.apache.logging.log4j.core.async.AsyncLoggerDisruptor.start(AsyncLoggerDisruptor.java:99)
[error] 	at org.apache.logging.log4j.core.async.AsyncLoggerContext.start(AsyncLoggerContext.java:75)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
[error] 	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
[error] 	at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:551)
[error] 	at test.Test$.delayedEndpoint$test$Test$1(Test.scala:9)
[error] 	at test.Test$delayedInit$body.apply(Test.scala:5)
[error] 	at scala.Function0.apply$mcV$sp(Function0.scala:34)
[error] 	at scala.Function0.apply$mcV$sp$(Function0.scala:34)
[error] 	at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
[error] 	at scala.App.$anonfun$main$1$adapted(App.scala:76)
[error] 	at scala.collection.immutable.List.foreach(List.scala:389)
[error] 	at scala.App.main(App.scala:76)
[error] 	at scala.App.main$(App.scala:74)
[error] 	at test.Test$.main(Test.scala:5)
[error] 	at test.Test.main(Test.scala)
[error] Caused by: java.lang.NullPointerException
[error] 	at jdk.nashorn.internal.runtime.Context.initLoggers(Context.java:1404)
[error] 	at jdk.nashorn.internal.runtime.Context.<init>(Context.java:549)
[error] 	at jdk.nashorn.internal.runtime.Context.<init>(Context.java:466)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:129)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:125)
[error] 	at java.security.AccessController.doPrivileged(Native Method)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngine.<init>(NashornScriptEngine.java:125)
[error] 	at jdk.nashorn.api.scripting.NashornScriptEngineFactory.getScriptEngine(NashornScriptEngineFactory.java:148)
[error] 	at org.apache.logging.log4j.core.script.ScriptManager.<init>(ScriptManager.java:96)
[error] 	at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:214)
[error] 	at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:244)
[error] 	at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:545)
[error] 	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:617)
[error] 	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:634)
[error] 	at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:229)
[error] 	at org.apache.logging.log4j.core.async.AsyncLoggerContext.start(AsyncLoggerContext.java:76)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
[error] 	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
[error] 	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
[error] 	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:122)
[error] 	at org.apache.logging.log4j.jul.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:34)
[error] 	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
[error] 	at org.apache.logging.log4j.jul.LogManager.getLogger(LogManager.java:89)
[error] 	at java.util.logging.LogManager.demandLogger(LogManager.java:551)
[error] 	at java.util.logging.Logger.demandLogger(Logger.java:455)
[error] 	at java.util.logging.Logger.getLogger(Logger.java:502)
[error] 	at jdk.nashorn.internal.runtime.logging.DebugLogger.instantiateLogger(DebugLogger.java:84)
[error] 	at jdk.nashorn.internal.runtime.logging.DebugLogger.<init>(DebugLogger.java:77)
[error] 	at jdk.nashorn.internal.runtime.logging.DebugLogger.<clinit>(DebugLogger.java:55)
[error] 	... 49 more

Test.scala

import org.apache.logging.log4j.LogManager

object Test extends App {
  System.setProperty("log4j.configurationFile", "log4jconfig.xml")
  System.setProperty("java.util.logging.manager", "org.apache.logging.log4j.jul.LogManager")
  System.setProperty("Log4jContextSelector", "org.apache.logging.log4j.core.async.AsyncLoggerContextSelector")
  val log = LogManager.getLogger(this.getClass)
  log.info("logging")
}