Timeouts on all scheduled tasks

Rakefile

@@ -2,31 +2,46 @@
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
+require 'timeout'
+
 require File.expand_path('../config/application', __FILE__)
 
 Dorian::Application.load_tasks
 
-desc 'Expires everything so that pages show fresher timestamps'
-task :expire => :environment do
+# use timeouts in here specifically because occasionally memcache takes a very
+# long time to respond and starts eating task time (i.e. dyno-hours)
+
+def clear_cache
   Slides.log :cache_clear do
-    Rails.cache.clear
+    Timeout.timeout(1) do
+      begin
+        Rails.cache.clear
+      rescue
+        $stderr.puts "error message=#{$!.message}"
+      end
+    end
   end
 end
 
+desc 'Expires everything so that pages show fresher timestamps'
+task :expire => :environment do
+  clear_cache
+end
+
 desc 'Update data from source for all modules (e.g. Goodreads, Twitter, etc.)'
 task :update => :environment do
   Slides.log :update do
     App.module_instances do |mod|
       Slides.log :update, module: mod.class.name do
         begin
-          mod.update
+          Timeout.timeout(10) do
+            mod.update
+          end
         rescue
-          $stderr.puts "update_error module=#{mod.class.name} message=#{$!.message}"
+          $stderr.puts "error module=#{mod.class.name} message=#{$!.message}"
         end
       end
     end
-    Slides.log :cache_clear do
-      Rails.cache.clear
-    end
+    clear_cache
   end
 end