diff --git a/modules/mogo-module-service/src/main/java/com/mogo/module/service/routeoverlay/RouteOverlayDrawer.java b/modules/mogo-module-service/src/main/java/com/mogo/module/service/routeoverlay/RouteOverlayDrawer.java
index 01076f6084..e8e827f4e4 100644
--- a/modules/mogo-module-service/src/main/java/com/mogo/module/service/routeoverlay/RouteOverlayDrawer.java
+++ b/modules/mogo-module-service/src/main/java/com/mogo/module/service/routeoverlay/RouteOverlayDrawer.java
@@ -100,6 +100,7 @@ public class RouteOverlayDrawer {
                 pps.clear();
                 List<MessagePad.TrajectoryPoint> routes = this.routeList;
                 if (routes == null || (total = routes.size()) < 2) {
+                    Log.d("Route", "--- 2 ---");
                     isExcept = true;
                     return;
                 }
@@ -134,6 +135,9 @@ public class RouteOverlayDrawer {
                 }
                 double lon = CallerAutoPilotStatusListenerManager.INSTANCE.getCurWgs84Lon();
                 double lat = CallerAutoPilotStatusListenerManager.INSTANCE.getCurWgs84Lat();
+                StringBuilder sb = new StringBuilder();
+                sb.append(lon).append(",").append(lat).append(",");
+                int removeCount = 0;
                 if (points.size() > 0) {
                     MogoLatLng top = null;
                     while (points.size() != 0) {
@@ -151,11 +155,13 @@ public class RouteOverlayDrawer {
                             RouteStrategy.INSTANCE.remove(first.acc);
                             pools.release(first);
                             points.poll();
+                            removeCount++;
                         }
                         top = first;
                     }
                     if (points.size() == 0) {
                         isExcept = true;
+                        Log.d("Route", "--- 3 ---");
                         return;
                     }
                     MogoLatLng self = pools.acquire();
@@ -197,12 +203,19 @@ public class RouteOverlayDrawer {
                         mMoGoPolyline.setVisible(true);
                     }
                 } else {
+                    Log.d("Route", "--- 4 ---");
                     isExcept = true;
                 }
+                for (MogoLatLng p : points) {
+                    sb.append(p.lon).append(",").append(p.lat);
+                }
+                Log.d("Route", "--- draw: removeCount:" + removeCount + ", data:" + sb);
             } catch (Throwable t) {
+                Log.d("Route", "--- draw error ---: error:" + t.getMessage());
                 t.printStackTrace();
             } finally {
                 if (isExcept) {
+                    Log.d("Route", "--- 5 ---");
                     setVisible(false);
                 }
                 if (points.size() > 0) {