Unregister signal handlers in child processes.

Author: dylanahsmith

lib/resque/worker.rb

@@ -141,6 +141,7 @@ def work(interval = 5.0, &block)
             procline "Forked #{@child} at #{Time.now.to_i}"
             Process.wait(@child)
           else
+            unregister_signal_handlers unless @cant_fork
             procline "Processing #{job.queue} since #{Time.now.to_i}"
             redis.client.reconnect # Don't share connection with parent
             perform(job, &block)
@@ -283,6 +284,18 @@ def register_signal_handlers
       log! "Registered signals"
     end
 
+    def unregister_signal_handlers
+      trap('TERM', 'DEFAULT')
+      trap('INT', 'DEFAULT')
+
+      begin
+        trap('QUIT', 'DEFAULT')
+        trap('USR1', 'DEFAULT')
+        trap('USR2', 'DEFAULT')
+      rescue ArgumentError
+      end
+    end
+
     # Schedule this worker for shutdown. Will finish processing the
     # current job.
     def shutdown