The configuration 'use_syslog' is deprecated. Remove it and

Error message

The configuration 'use_syslog' is deprecated. Remove it and use 'logger' instead

What it means

Error "The configuration 'use_syslog' is deprecated. Remove it and use 'logger' instead" thrown in ytti/oxidized.

Source

Thrown at lib/oxidized/logger.rb:15

require 'semantic_logger'

module Oxidized
  module Logger
    include SemanticLogger::Loggable

    def self.setup
      config = Oxidized.config
      FileUtils.mkdir_p(Config::LOG) unless File.directory?(Config::LOG)

      SemanticLogger.add_signal_handler

      if config.use_syslog?
        SemanticLogger.add_appender(appender: :syslog)
        logger.warn("The configuration 'use_syslog' is deprecated. " \
                    "Remove it and use 'logger' instead")
      elsif config.log?
        SemanticLogger.add_appender(file_name: File.expand_path(config.log))
        logger.warn("The configuration 'log' is deprecated. " \
                    "Remove it and use 'logger' instead")
      elsif config.logger?
        SemanticLogger.default_level = config.logger.level if config.logger.level?
        config.logger.appenders.each { |a| add_appender a } if config.logger.has_key?('appenders')
      end

      # No appenders configured
      SemanticLogger.add_appender(io: $stderr) if SemanticLogger.appenders.empty?

      return if %i[trace debug].include?(SemanticLogger.default_level)

      SemanticLogger.default_level = :debug if config.debug?
    end

View on GitHub (pinned to 687ed4262d)

When it happens

Trigger: Thrown at lib/oxidized/logger.rb:15 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ytti/oxidized@687ed4262d (2026-08-23). Data as JSON: /api/errors/b6f6552a8b2bcaf9. Report an issue: GitHub.