diff --git a/internal/rootcoord/meta_table.go b/internal/rootcoord/meta_table.go
index f3ac3bbea6..4fc40d3f3e 100644
--- a/internal/rootcoord/meta_table.go
+++ b/internal/rootcoord/meta_table.go
@@ -376,7 +376,7 @@ func (mt *metaTable) GetCollectionByName(collectionName string, ts typeutil.Time
 		}
 		col, ok := mt.collID2Meta[vid]
 		if !ok {
-			return nil, fmt.Errorf("can't find collection: " + collectionName)
+			return nil, fmt.Errorf("can't find collection %s with id %d", collectionName, vid)
 		}
 		colCopy := proto.Clone(&col)
 		return colCopy.(*pb.CollectionInfo), nil
diff --git a/internal/rootcoord/meta_table_test.go b/internal/rootcoord/meta_table_test.go
index f6f0e66b22..6383b11589 100644
--- a/internal/rootcoord/meta_table_test.go
+++ b/internal/rootcoord/meta_table_test.go
@@ -511,7 +511,7 @@ func TestMetaTable(t *testing.T) {
 		mt.collID2Meta = make(map[int64]pb.CollectionInfo)
 		_, err = mt.GetCollectionByName(collInfo.Schema.Name, 0)
 		assert.NotNil(t, err)
-		assert.EqualError(t, err, fmt.Sprintf("can't find collection: %s", collInfo.Schema.Name))
+		assert.EqualError(t, err, fmt.Sprintf("can't find collection %s with id %d", collInfo.Schema.Name, collInfo.ID))
 
 	})
 
diff --git a/internal/rootcoord/root_coord.go b/internal/rootcoord/root_coord.go
index f9e61038f7..62db109877 100644
--- a/internal/rootcoord/root_coord.go
+++ b/internal/rootcoord/root_coord.go
@@ -1204,7 +1204,7 @@ func (c *Core) DropCollection(ctx context.Context, in *milvuspb.DropCollectionRe
 	}
 	err := executeTask(t)
 	if err != nil {
-		log.Debug("DropCollection Failed", zap.String("name", in.CollectionName), zap.Int64("msgID", in.Base.MsgID))
+		log.Debug("DropCollection Failed", zap.String("name", in.CollectionName), zap.Int64("msgID", in.Base.MsgID), zap.Error(err))
 		return &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_UnexpectedError,
 			Reason:    "Drop collection failed: " + err.Error(),