logback.xml works find at the local environment, but doesn't work in real server

Question

I'm using scala-based scalatra for web frameworks and I'm having trouble setting up logback.xml.

I set my logback.xml file in PROJECT_ROOT/src/main/resources/logback.xml like below

logback.xml

<configuration>
  <appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>server_error.log</file>
    <append>true</append>
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <root level="info">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </root>
</configuration>

and I set javaOptions variable in build.sbt file like below

build.sbt

settings = ScalatraPlugin.scalatraSettings ++ scalateSettings ++ Seq(
    organization := Organization,
    name := Name,
    version := Version,
    scalaVersion := ScalaVersion,
    fork := true,
    javaOptions := Seq("-Dlogback.configurationFile=src/main/resources/logback.xml"),
    resolvers += Classpaths.typesafeReleases,
    libraryDependencies ++= Seq(
      "org.scalatra" %% "scalatra" % ScalatraVersion,
      "org.scalatra" %% "scalatra-scalate" % ScalatraVersion,
      "org.scalatra" %% "scalatra-specs2" % ScalatraVersion % "test",
      "ch.qos.logback" % "logback-classic" % "1.1.5" % "runtime",
      "org.eclipse.jetty" % "jetty-webapp" % "9.2.15.v20160210" % "container",
      "javax.servlet" % "javax.servlet-api" % "3.1.0" % "provided",
      "com.typesafe" % "config" % "1.3.1",
      "com.amazonaws" % "aws-java-sdk-dynamodb" % "1.11.142",
      "org.mongodb.scala" %% "mongo-scala-driver" % "1.2.1"
    )

Logging process works really fine when I run this project on local environment, but from production server I cannot find "server_error.log" file from anywhere that should be generated by logback.xml. I'm using aws elasticbeanstalk and deployed on elasticbeanstalk the .war file generated by using 'package' command from sbt.