etcdhttp: return 404 when removing nonexistent member

Documentation/0.5/other_apis.md

@@ -78,7 +78,7 @@ curl http://10.0.0.10:2379/v2/members -XPOST -H "Content-Type: application/json"
 
 ## Delete a member
 
-Remove a member from the cluster.
+Remove a member from the cluster. The member ID must be a hex-encoded uint64.
 Returns empty when successful. Returns a string describing the failure condition when unsuccessful. 
 
 If the member does not exist in the cluster an HTTP 500(TODO: fix this) will be returned. If the cluster fails to process the request within timeout an HTTP 500 will be returned, though the request may be processed later.

etcdserver/etcdhttp/client.go

@@ -210,7 +210,7 @@ func (h *membersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 		id, err := types.IDFromString(idStr)
 		if err != nil {
-			writeError(w, httptypes.NewHTTPError(http.StatusBadRequest, err.Error()))
+			writeError(w, httptypes.NewHTTPError(http.StatusNotFound, fmt.Sprintf("No such member: %s", idStr)))
 			return
 		}
 		err = h.server.RemoveMember(ctx, uint64(id))
@@ -223,6 +223,7 @@ func (h *membersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			log.Printf("etcdhttp: error removing node %s: %v", id, err)
 			writeError(w, err)
 		default:
+			log.Printf("etcdhttp: removed node %x", id)
 			w.WriteHeader(http.StatusNoContent)
 		}
 	}

etcdserver/etcdhttp/client_test.go

@@ -845,7 +845,7 @@ func TestServeMembersFail(t *testing.T) {
 			},
 			nil,
 
-			http.StatusBadRequest,
+			http.StatusNotFound,
 		},
 		{
 			// etcdserver.RemoveMember with no ID