diff --git a/config/environments/production.rb b/config/environments/production.rb
index 63931fa33..b3c783be8 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -17,7 +17,7 @@ RedmineApp::Application.configure do
   # config.logger.level = Logger::INFO
 
   # Full error reports are disabled and caching is turned on
-  config.logger = Logger.new('log/production.log', 'daily',1048576) # daily, weekly or monthly
+  # config.logger = Logger.new('log/production.log', 'daily',1048576) # daily, weekly or monthly
   config.action_controller.perform_caching = true
 
   # to additional_environment.rb
diff --git a/config/initializers/logger.rb b/config/initializers/logger.rb
index e9b61ce06..2f707182a 100644
--- a/config/initializers/logger.rb
+++ b/config/initializers/logger.rb
@@ -194,36 +194,36 @@ require 'fileutils'
 #   end
 #   # e.g. "Thu Sep 22 08:51:08 GMT+9:00 2005: hello world"
 #
-class Logger
-  #具体内容请看https://bugs.ruby-lang.org/issues/7303
-  # Device used for logging messages.
-  class LogDevice
-    def shift_log_period(period_end)
-      postfix = period_end.strftime("%Y%m%d") # YYYYMMDD
-      age_file = "#{@filename}.#{postfix}"
-      if FileTest.exist?(age_file)
-        # try to avoid filename crash caused by Timestamp change.
-        idx = 0
-        # .99 can be overridden; avoid too much file search with 'loop do'
-        while idx < 100
-          idx += 1
-          age_file = "#{@filename}.#{postfix}.#{idx}"
-          break unless FileTest.exist?(age_file)
-        end
-      end
-      # @dev.close rescue nil
-      # File.rename("#{@filename}", age_file)
-      # @dev = create_logfile(@filename)
-      #覆盖原来lib库的方法，将上边三行删除，增加下边两行
-      FileUtils.cp(@filename, age_file)
-      reset_logfile(@dev) # see below for this new method return true
-      return true
-    end
-    #打开原来lib库，新增一个方法
-    def reset_logfile(logdev)
-      logdev.truncate( 0 )
-      logdev.sync = true
-      add_log_header(logdev)
-    end
-  end
-end
+# class Logger
+#   #具体内容请看https://bugs.ruby-lang.org/issues/7303
+#   # Device used for logging messages.
+#   class LogDevice
+#     def shift_log_period(period_end)
+#       postfix = period_end.strftime("%Y%m%d") # YYYYMMDD
+#       age_file = "#{@filename}.#{postfix}"
+#       if FileTest.exist?(age_file)
+#         # try to avoid filename crash caused by Timestamp change.
+#         idx = 0
+#         # .99 can be overridden; avoid too much file search with 'loop do'
+#         while idx < 100
+#           idx += 1
+#           age_file = "#{@filename}.#{postfix}.#{idx}"
+#           break unless FileTest.exist?(age_file)
+#         end
+#       end
+#       # @dev.close rescue nil
+#       # File.rename("#{@filename}", age_file)
+#       # @dev = create_logfile(@filename)
+#       #覆盖原来lib库的方法，将上边三行删除，增加下边两行
+#       FileUtils.cp(@filename, age_file)
+#       reset_logfile(@dev) # see below for this new method return true
+#       return true
+#     end
+#     #打开原来lib库，新增一个方法
+#     def reset_logfile(logdev)
+#       logdev.truncate( 0 )
+#       logdev.sync = true
+#       add_log_header(logdev)
+#     end
+#   end
+# end