diff --git a/src/storage/ddl/ob_complement_data_task.cpp b/src/storage/ddl/ob_complement_data_task.cpp
index 6ea7346e22..4e0971a139 100644
--- a/src/storage/ddl/ob_complement_data_task.cpp
+++ b/src/storage/ddl/ob_complement_data_task.cpp
@@ -814,7 +814,8 @@ int ObComplementPrepareTask::process()
 }
 
 ObComplementWriteTask::ObComplementWriteTask()
-  : ObITask(TASK_TYPE_COMPLEMENT_WRITE), is_inited_(false), task_id_(0), param_(nullptr),
+  : ObITask(TASK_TYPE_COMPLEMENT_WRITE), allocator_("WriteTaskAlloc", OB_MALLOC_NORMAL_BLOCK_SIZE, MTL_ID()),
+    is_inited_(false), task_id_(0), param_(nullptr),
     context_(nullptr), write_row_(),
     col_ids_(), org_col_ids_(), output_projector_()
 {
@@ -822,6 +823,11 @@ ObComplementWriteTask::ObComplementWriteTask()
 
 ObComplementWriteTask::~ObComplementWriteTask()
 {
+  col_ids_.reset();
+  org_col_ids_.reset();
+  output_projector_.reset();
+  write_row_.reset();
+  allocator_.reset();
 }
 
 int ObComplementWriteTask::init(const int64_t task_id, ObComplementDataParam &param,
@@ -849,7 +855,7 @@ int ObComplementWriteTask::init(const int64_t task_id, ObComplementDataParam &pa
   } else if (OB_FAIL(hidden_table_schema->get_store_column_count(schema_stored_column_cnt))) {
     LOG_WARN("get stored column cnt failed", K(ret));
   } else if (OB_FAIL(write_row_.init(
-              param.allocator_, schema_stored_column_cnt + storage::ObMultiVersionRowkeyHelpper::get_extra_rowkey_col_cnt()))) {
+              allocator_, schema_stored_column_cnt + storage::ObMultiVersionRowkeyHelpper::get_extra_rowkey_col_cnt()))) {
     LOG_WARN("Fail to init write row", K(ret));
   } else {
     write_row_.row_flag_.set_flag(ObDmlFlag::DF_INSERT);
diff --git a/src/storage/ddl/ob_complement_data_task.h b/src/storage/ddl/ob_complement_data_task.h
index 8e4ef19b7b..b9f8c2bc76 100644
--- a/src/storage/ddl/ob_complement_data_task.h
+++ b/src/storage/ddl/ob_complement_data_task.h
@@ -43,8 +43,9 @@ public:
     is_inited_(false), orig_tenant_id_(common::OB_INVALID_TENANT_ID), dest_tenant_id_(common::OB_INVALID_TENANT_ID),
     orig_ls_id_(share::ObLSID::INVALID_LS_ID), dest_ls_id_(share::ObLSID::INVALID_LS_ID), orig_table_id_(common::OB_INVALID_ID),
     dest_table_id_(common::OB_INVALID_ID), orig_tablet_id_(ObTabletID::INVALID_TABLET_ID), dest_tablet_id_(ObTabletID::INVALID_TABLET_ID),
-    allocator_("CompleteDataPar", OB_MALLOC_NORMAL_BLOCK_SIZE, MTL_ID()), row_store_type_(common::ENCODING_ROW_STORE), orig_schema_version_(0), dest_schema_version_(0),
-    snapshot_version_(0), concurrent_cnt_(0), task_id_(0), execution_id_(-1), tablet_task_id_(0), compat_mode_(lib::Worker::CompatMode::INVALID), data_format_version_(0)
+    row_store_type_(common::ENCODING_ROW_STORE), orig_schema_version_(0), dest_schema_version_(0),
+    snapshot_version_(0), concurrent_cnt_(0), task_id_(0), execution_id_(-1), tablet_task_id_(0), compat_mode_(lib::Worker::CompatMode::INVALID), data_format_version_(0),
+    allocator_("CompleteDataPar", OB_MALLOC_NORMAL_BLOCK_SIZE, MTL_ID())
   {}
   ~ObComplementDataParam() { destroy(); }
   int init(const obrpc::ObDDLBuildSingleReplicaRequestArg &arg);
@@ -99,7 +100,6 @@ public:
   uint64_t dest_table_id_;
   ObTabletID orig_tablet_id_;
   ObTabletID dest_tablet_id_;
-  common::ObArenaAllocator allocator_;
   common::ObRowStoreType row_store_type_;
   int64_t orig_schema_version_;
   int64_t dest_schema_version_;
@@ -111,6 +111,8 @@ public:
   lib::Worker::CompatMode compat_mode_;
   uint64_t data_format_version_;
   ObSEArray<common::ObStoreRange, 32> ranges_;
+private:
+  common::ObArenaAllocator allocator_;
 };
 
 void add_ddl_event(const ObComplementDataParam *param, const ObString &stmt);
@@ -120,8 +122,9 @@ struct ObComplementDataContext final
 public:
   ObComplementDataContext():
     is_inited_(false), is_major_sstable_exist_(false), complement_data_ret_(common::OB_SUCCESS),
-    allocator_("CompleteDataCtx", OB_MALLOC_NORMAL_BLOCK_SIZE, MTL_ID()), lock_(ObLatchIds::COMPLEMENT_DATA_CONTEXT_LOCK), concurrent_cnt_(0),
-    data_sstable_redo_writer_(), index_builder_(nullptr), start_scn_(share::SCN::min_scn()), tablet_direct_load_mgr_handle_(), row_scanned_(0), row_inserted_(0), context_id_(0)
+    lock_(ObLatchIds::COMPLEMENT_DATA_CONTEXT_LOCK), concurrent_cnt_(0),
+    data_sstable_redo_writer_(), index_builder_(nullptr), start_scn_(share::SCN::min_scn()), tablet_direct_load_mgr_handle_(), row_scanned_(0), row_inserted_(0), context_id_(0),
+    allocator_("CompleteDataCtx", OB_MALLOC_NORMAL_BLOCK_SIZE, MTL_ID())
   {}
   ~ObComplementDataContext() { destroy(); }
   int init(const ObComplementDataParam &param, const blocksstable::ObDataStoreDesc &desc);
@@ -139,7 +142,6 @@ public:
   bool is_inited_;
   bool is_major_sstable_exist_;
   int complement_data_ret_;
-  common::ObArenaAllocator allocator_;
   ObSpinLock lock_;
   int64_t concurrent_cnt_;
   ObDDLRedoLogWriter data_sstable_redo_writer_;
@@ -151,6 +153,8 @@ public:
   int64_t context_id_;
   ObArray<int64_t> report_col_checksums_;
   ObArray<int64_t> report_col_ids_;
+private:
+  common::ObArenaAllocator allocator_;
 };
 
 class ObComplementPrepareTask;
@@ -229,6 +233,7 @@ private:
 
 private:
   static const int64_t RETRY_INTERVAL = 100 * 1000; // 100ms
+  common::ObArenaAllocator allocator_;
   bool is_inited_;
   int64_t task_id_;
   ObComplementDataParam *param_;