promote exception traceback from the remote actor to the local node

lib/dcell/actor_proxy.rb

@@ -26,7 +26,7 @@ def ______any_method_missing(handler, meth, *args, &block)
     rescue AbortError => e
       cause = e.cause
       raise Celluloid::DeadActorError.new if cause.kind_of? Celluloid::DeadActorError
-      raise RuntimeError, cause
+      raise RuntimeError, cause, cause.backtrace
     end
 
     def ______method_missing(meth, *args, &block)

lib/dcell/messages.rb

@@ -20,6 +20,10 @@ def respond(rsp)
       __respond rsp, :response
     end
 
+    def exception(e)
+      respond ErrorResponse.new(id, @sender[:address], {class: e.class.name, msg: e.to_s, tb: e.backtrace})
+    end
+
     # A request to open relay pipe
     class RelayOpen < Message
       def initialize(sender)
@@ -33,7 +37,7 @@ def dispatch
         respond SuccessResponse.new(id, @sender[:address], node.rserver.addr)
       rescue => e
         # :nocov:
-        respond ErrorResponse.new(id, @sender[:address], {class: e.class.name, msg: e.to_s})
+        exception e
         # :nocov:
       end
 
@@ -168,16 +172,12 @@ def success(value)
         respond SuccessResponse.new(id, @sender[:address], value)
       end
 
-      def exception(e)
-        respond ErrorResponse.new(id, @sender[:address], {class: e.class.name, msg: e.to_s})
-      end
-
       def dispatch
         actor = DCell.get_local_actor @message[:actor].to_sym
         begin
           actor.async :____dcell_dispatch, self
         rescue => e
-          respond ErrorResponse.new(id, @sender[:address], {class: e.class.name, msg: e.to_s})
+          exception e
         end
       end
 

lib/dcell/node.rb

@@ -188,9 +188,11 @@ def send_request(request, pipe=:request, timeout=nil)
       response = push_request request, pipe, timeout
       return if response.is_a? CancelResponse
       if response.is_a? ErrorResponse
-        klass = Utils::full_const_get response.value[:class]
-        msg = response.value[:msg]
-        abort klass.new msg
+        value = response.value
+        klass = Utils::full_const_get value[:class]
+        exception = klass.new value[:msg]
+        exception.set_backtrace value[:tb]
+        abort exception
       end
       response.value
     end