Configuration:
  Properties:
    Property:
      # Fallback if the system property is not set
      - name: "kafka.logs.dir"
        value: "."
      - name: "logPattern"
        value: "[%d] %p %m (%c)%n"

  # Appenders configuration
  # See: https://logging.apache.org/log4j/2.x/manual/appenders.html
  Appenders:
    Console:
      name: STDOUT
      PatternLayout:
        pattern: "${logPattern}"

    RollingFile:
      - name: KafkaAppender
        fileName: "${sys:kafka.logs.dir}/server.log"
        filePattern: "${sys:kafka.logs.dir}/server.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1
      # State Change appender
      - name: StateChangeAppender
        fileName: "${sys:kafka.logs.dir}/state-change.log"
        filePattern: "${sys:kafka.logs.dir}/stage-change.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1
      # Request appender
      - name: RequestAppender
        fileName: "${sys:kafka.logs.dir}/kafka-request.log"
        filePattern: "${sys:kafka.logs.dir}/kafka-request.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1
      # Cleaner appender
      - name: CleanerAppender
        fileName: "${sys:kafka.logs.dir}/log-cleaner.log"
        filePattern: "${sys:kafka.logs.dir}/log-cleaner.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1
      # Controller appender
      - name: ControllerAppender
        fileName: "${sys:kafka.logs.dir}/controller.log"
        filePattern: "${sys:kafka.logs.dir}/controller.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1
      # Authorizer appender
      - name: AuthorizerAppender
        fileName: "${sys:kafka.logs.dir}/kafka-authorizer.log"
        filePattern: "${sys:kafka.logs.dir}/kafka-authorizer.log.%d{yyyy-MM-dd-HH}"
        PatternLayout:
          pattern: "${logPattern}"
        TimeBasedTriggeringPolicy:
          modulate: true
          interval: 1

  # Loggers configuration
  # See: https://logging.apache.org/log4j/2.x/manual/configuration.html#configuring-loggers
  Loggers:
    Root:
      level: WARN
      AppenderRef:
        - ref: STDOUT
        - ref: KafkaAppender
    Logger:
      # Kafka logger
      - name: kafka
        level: WARN
      # Kafka org.apache logger
      - name: org.apache.kafka
        level: WARN
      # Kafka request logger
      - name: kafka.request.logger
        level: WARN
        additivity: false
        AppenderRef:
          ref: RequestAppender
      # Uncomment the lines below and change log4j.logger.kafka.network.RequestChannel$ to TRACE
      # for additional output related to the handling of requests
      #      - name: kafka.network.Processor
      #        level: TRACE
      #        additivity: false
      #        AppenderRef:
      #          ref: RequestAppender
      #      - name: kafka.server.KafkaApis
      #        level: TRACE
      #        additivity: false
      #        AppenderRef:
      #          ref: RequestAppender
      # Kafka network RequestChannel$ logger
      - name: kafka.network.RequestChannel$
        level: WARN
        additivity: false
        AppenderRef:
          ref: RequestAppender
      # Controller logger
      - name: org.apache.kafka.controller
        level: WARN
        additivity: false
        AppenderRef:
          ref: ControllerAppender
      # LogCleaner logger
      - name: kafka.log.LogCleaner
        level: WARN
        additivity: false
        AppenderRef:
          ref: CleanerAppender
      # State change logger
      - name: state.change.logger
        level: WARN
        additivity: false
        AppenderRef:
          ref: StateChangeAppender
      # Authorizer logger
      - name: kafka.authorizer.logger
        level: WARN
        additivity: false
        AppenderRef:
          ref: AuthorizerAppender