Don't report nodes filtered out through the short-lived-connections join

render/filters.go

@@ -169,6 +169,18 @@ func FilterUnconnected(r Renderer) Renderer {
 	)
 }
 
+// SilentFilterUnconnected produces a renderer that filters unconnected nodes
+// from the given renderer; nodes filtered by this are not reported in stats.
+func SilentFilterUnconnected(r Renderer) Renderer {
+	return MakeSilentFilter(
+		func(node report.Node) bool {
+			_, ok := node.Latest.Lookup(IsConnected)
+			return ok
+		},
+		ColorConnected(r),
+	)
+}
+
 // FilterNoop does nothing.
 func FilterNoop(in Renderer) Renderer {
 	return in

render/topologies.go

@@ -84,7 +84,7 @@ var ContainerRenderer = MakeReduce(
 	// We need to be careful to ensure we only include each edge once.  Edges brought in
 	// by the above renders will have a pid, so its enough to filter out any nodes with
 	// pids.
-	FilterUnconnected(MakeMap(
+	SilentFilterUnconnected(MakeMap(
 		MapIP2Container,
 		MakeReduce(
 			MakeMap(