Use defer, fixes #398

Changes.md

@@ -1,6 +1,7 @@
 2.3.1
 -----------
 
+- Re-enable Celluloid::Actor#defer to fix stack overflow issues [#398]
 - Add support for multiple processes per host to Capistrano recipe
 
 2.3.0

lib/sidekiq/processor.rb

@@ -32,6 +32,7 @@ module Sidekiq
     end
 
     def process(msgstr, queue)
+      defer do
         begin
           msg = Sidekiq.load_json(msgstr)
           klass  = constantize(msg['class'])
@@ -46,6 +47,7 @@ module Sidekiq
             handle_exception(ex, msg || { :message => msgstr })
           raise
         end
+      end
       @boss.processor_done!(current_actor)
     end
 

lib/sidekiq/version.rb

@@ -1,3 +1,3 @@
 module Sidekiq
-  VERSION = "2.3.0"
+  VERSION = "2.3.1"
 end