clarify deployment using anonymous factories

akka-docs/java/remoting.rst

@@ -92,6 +92,14 @@ As you can see from the example above the following pattern is used to find an `
 
     akka://<actorsystemname>@<hostname>:<port>/<actor path>
 
+.. note::
+
+  In order to ensure serializability of ``Props`` when passing constructor
+  arguments to the actor being created, do not make the factory a non-static
+  inner class: this will inherently capture a reference to its enclosing
+  object, which in most cases is not serializable. It is best to make a static
+  inner class which implements :class:`UntypedActorFactory`.
+
 Programmatic Remote Deployment
 ------------------------------
 

akka-docs/scala/remoting.rst

@@ -105,6 +105,14 @@ Once you have configured the properties above you would do the following in code
 ``SampleActor`` has to be available to the runtimes using it, i.e. the classloader of the
 actor systems has to have a JAR containing the class.
 
+.. note::
+
+  In order to ensure serializability of ``Props`` when passing constructor
+  arguments to the actor being created, do not make the factory an inner class:
+  this will inherently capture a reference to its enclosing object, which in
+  most cases is not serializable. It is best to create a factory method in the
+  companion object of the actor’s class.
+
 Programmatic Remote Deployment
 ------------------------------