fix: fix das retry failed to refresh tablet location

src/sql/das/ob_das_context.cpp

@@ -570,6 +570,7 @@ OB_DEF_SERIALIZE(ObDASCtx)
   }
   OB_UNIS_ENCODE(flags_);
   OB_UNIS_ENCODE(snapshot_);
+  OB_UNIS_ENCODE(location_router_);
   return ret;
 }
 
@@ -599,6 +600,7 @@ OB_DEF_DESERIALIZE(ObDASCtx)
   if (OB_SUCC(ret) && OB_FAIL(rebuild_tablet_loc_reference())) {
     LOG_WARN("rebuild tablet loc reference failed", K(ret));
   }
+  OB_UNIS_DECODE(location_router_);
   return ret;
 }
 
@@ -612,6 +614,7 @@ OB_DEF_SERIALIZE_SIZE(ObDASCtx)
   }
   OB_UNIS_ADD_LEN(flags_);
   OB_UNIS_ADD_LEN(snapshot_);
+  OB_UNIS_ADD_LEN(location_router_);
   return len;
 }
 }  // namespace sql

src/sql/das/ob_das_location_router.cpp

@@ -1255,5 +1255,7 @@ int ObDASLocationRouter::get_external_table_ls_location(ObLSLocation &location)
   return ret;
 }
 
+OB_SERIALIZE_MEMBER(ObDASLocationRouter, all_tablet_list_);
+
 }  // namespace sql
 }  // namespace oceanbase

src/sql/das/ob_das_location_router.h

@@ -275,6 +275,7 @@ private:
 
 class ObDASLocationRouter
 {
+  OB_UNIS_VERSION(1);
   friend class ObDASCtx;
   typedef common::ObList<VirtualSvrPair, common::ObIAllocator> VirtualSvrList;
 public:
@@ -338,6 +339,8 @@ private:
   int last_errno_;
   int cur_errno_;
   int64_t retry_cnt_;
+  // NOTE: Only all_tablet_list_ needs to be serialized and send to other server to perform das remote execution;
+  // And other members will be collected by execution server self, No need to perform serialization;
   ObList<common::ObTabletID, common::ObIAllocator> all_tablet_list_;
   ObList<common::ObTabletID, common::ObIAllocator> succ_tablet_list_;
   VirtualSvrList virtual_server_list_;

src/sql/das/ob_data_access_service.cpp

@@ -290,7 +290,7 @@ int ObDataAccessService::retry_das_task(ObDASRef &das_ref, ObIDASTaskOp &task_op
           } else if (OB_FAIL(execute_dist_das_task(das_ref, das_task_wrapper, false))) {
             LOG_WARN("execute dist DAS task failed", K(ret));
           }
-          LOG_INFO("[DAS RETRY] Retry completing the DAS Task", KPC(task_op.get_tablet_loc()));
+          LOG_INFO("[DAS RETRY] Retry completing the DAS Task", KPC(task_op.get_tablet_loc()), KR(ret));
         }
         task_op.errcode_ = ret;
         retry_continue = (OB_SUCCESS != ret);