1 files changed, 5 insertions, 1 deletions
diff --git a/railties/lib/rails/rack/log_tailer.rb b/railties/lib/rails/rack/log_tailer.rb
index 18f22e8089..bc26421a9e 100644
--- a/railties/lib/rails/rack/log_tailer.rb
+++ b/railties/lib/rails/rack/log_tailer.rb
@@ -1,13 +1,17 @@
+require 'active_support/deprecation'
+
 module Rails
   module Rack
     class LogTailer
       def initialize(app, log = nil)
+        ActiveSupport::Deprecation.warn "LogTailer is deprecated and will be removed on Rails 5"
+
         @app = app
 
         path = Pathname.new(log || "#{::File.expand_path(Rails.root)}/log/#{Rails.env}.log").cleanpath
 
         @cursor = @file = nil
-        if ::File.exists?(path)
+        if ::File.exist?(path)
           @cursor = ::File.size(path)
           @file = ::File.open(path, 'r')
         end