diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.cc
index 6daef4c98b..33852c8536 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.cc
@@ -21,7 +21,7 @@ namespace mindspore {
 namespace kernel {
 template <typename T>
 void ConcatCPUKernel<T>::InitKernel(const CNodePtr &kernel_node) {
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   CheckParam(kernel_node);
 
   axis_ = LongToInt(AnfAlgo::GetNodeAttr<int64_t>(kernel_node, AXIS));
@@ -35,6 +35,10 @@ template <typename T>
 bool ConcatCPUKernel<T>::Launch(const std::vector<kernel::AddressPtr> &inputs,
                                 const std::vector<kernel::AddressPtr> & /*workspace*/,
                                 const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   size_t input_num = AnfAlgo::GetInputTensorNum(node_);
   std::vector<std::vector<size_t>> input_flat_shape_list;
   for (size_t i = 0; i < input_num; i++) {
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.h
index 3f6887cdf7..0a63dd7ea1 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/concat_cpu_kernel.h
@@ -36,7 +36,7 @@ class ConcatCPUKernel : public CPUKernel {
  private:
   void CheckParam(const CNodePtr &kernel_node);
   int axis_ = 0;
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL_T(
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.cc
index 9bda0aec33..38982941db 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.cc
@@ -20,7 +20,7 @@
 namespace mindspore {
 namespace kernel {
 void DynamicAssignCPUKernel::InitKernel(const CNodePtr &kernel_node) {
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   input_x_dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 0);
   input_x_dtype_size_ = GetTypeByte(TypeIdToType(input_x_dtype_));
 }
@@ -46,6 +46,10 @@ bool DynamicAssignCPUKernel::Launch(const std::vector<kernel::AddressPtr> &input
 template <typename T>
 void DynamicAssignCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
                                           const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto input_x_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 0);
   auto input_y_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 1);
   batch_size_ = 1;
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.h
index 33c8f1e87b..3f4e170996 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/dynamic_assign_cpu_kernel.h
@@ -41,7 +41,7 @@ class DynamicAssignCPUKernel : public CPUKernel {
   size_t batch_size_{1};
   TypeId input_x_dtype_{kTypeUnknown};
   size_t input_x_dtype_size_ = 4;
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.cc
index 5e24d73c55..bfbfc8c8c4 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.cc
@@ -49,7 +49,7 @@ void LookUpTableTask(const float *input_addr, const T *indices_addr, float *outp
 
 void EmbeddingLookUpCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   CheckParam(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   std::vector<size_t> input_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
   if (input_shape.empty()) {
     MS_LOG(EXCEPTION) << "param must be at least 1D";
@@ -73,7 +73,11 @@ void EmbeddingLookUpCPUKernel::InitKernel(const CNodePtr &kernel_node) {
 template <typename T>
 void EmbeddingLookUpCPUKernel::LaunchKernel(const std::vector<kernel::AddressPtr> &inputs,
                                             const std::vector<kernel::AddressPtr> &outputs) {
-  if (node_ != nullptr) {
+  if (!node_wpt_.expired()) {
+    auto node_ = node_wpt_.lock();
+    if (!node_) {
+      MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+    }
     std::vector<size_t> input_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 0);
     if (input_shape.empty()) {
       MS_LOG(EXCEPTION) << "param must be at least 1D";
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.h
index b1639100da..0034379184 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/embedding_look_up_cpu_kernel.h
@@ -41,7 +41,7 @@ class EmbeddingLookUpCPUKernel : public CPUKernel {
   size_t first_dim_size_{1};
   size_t outer_dim_size_{1};
   TypeId indices_data_type_{kNumberTypeInt32};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.cc
index 00c18d8808..5dee725684 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.cc
@@ -42,9 +42,21 @@ int Compress(HashmapEntry<T> *entry_p, const size_t &length, T entry) {
   return compress_count;
 }
 
+void UpdateShape(size_t miss_count, const CNodePtr &node_) {
+  std::vector<size_t> out_shape;
+  out_shape.emplace_back(miss_count);
+  std::vector<TypeId> dtypes;
+  size_t output_num = AnfAlgo::GetOutputTensorNum(node_);
+  for (size_t i = 0; i < output_num; i++) {
+    dtypes.push_back(AnfAlgo::GetOutputInferDataType(node_, i));
+  }
+  AnfAlgo::SetOutputInferTypeAndShape(dtypes, {AnfAlgo::GetOutputInferShape(node_, 0), out_shape, out_shape, out_shape},
+                                      node_.get());
+}
+
 void MapCacheIdxCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   auto hashmap_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
   if (hashmap_shape.size() != 2) {
     MS_LOG(EXCEPTION) << "Dimension of HashMap must be 2, (n, 4)";
@@ -73,6 +85,7 @@ bool MapCacheIdxCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
 template <typename T>
 void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
                                         const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
   auto emb_idx_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 1);
   batch_size_ = 1;
   for (size_t i = 0; i < emb_idx_shape.size(); ++i) {
@@ -92,7 +105,6 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
   float total_count = 0;
   int count_size = 0;
   float hit_count = 0;
-
   // search_cache_idx
   for (size_t i = 0; i < batch_size_; ++i) {
     T key = input_indices[i] - offset;
@@ -107,7 +119,6 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
       tmp_entry = (tmp_entry + 1) % hashmap_length_;
       if (count > hashmap_length_) {
         MS_LOG(EXCEPTION) << "Hashmap is full, search cache idx failed, please set a larger vocab_cache_size!";
-        break;
       }
       count += 1;
     }
@@ -130,7 +141,6 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
     MS_LOG(INFO) << "Avg search count: " << total_count / count_size;
     MS_LOG(INFO) << "Cache hit rate: " << hit_count / count_size;
   }
-
   float total_insert_count = 0;
   float total_delete_count = 0;
   // swap hash map
@@ -142,7 +152,6 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
       entry = (entry + 1) % hashmap_length_;
       if (tag_count > hashmap_length_) {
         MS_LOG(EXCEPTION) << "Hashmap is full, insert new key failed, please set a larger vocab_cache_size!";
-        break;
       }
       tag_count++;
     }
@@ -155,7 +164,6 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
       tmp_entry = (tmp_entry + 1) % hashmap_length_;
       if (delete_count > hashmap_length_) {
         MS_LOG(EXCEPTION) << "Hashmap is full, delete old key failed, please set a larger vocab_cache_size!";
-        break;
       }
       delete_count++;
     }
@@ -171,22 +179,11 @@ void MapCacheIdxCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
     MS_LOG(INFO) << "Insert count: " << total_insert_count / miss_count;
     MS_LOG(INFO) << "Delete count: " << total_delete_count / miss_count;
   }
-  // update step
   step_[0] += 1;
-  // update cache idx
   for (size_t i = 0; i < miss_count; ++i) {
-    int idx = miss_idx[i];
-    output_cache_idx[idx] = output_swap_cache_idx[i];
+    output_cache_idx[miss_idx[i]] = output_swap_cache_idx[i];
   }
-  std::vector<size_t> out_shape;
-  out_shape.emplace_back(miss_count);
-  std::vector<TypeId> dtypes;
-  size_t output_num = AnfAlgo::GetOutputTensorNum(node_);
-  for (size_t i = 0; i < output_num; i++) {
-    dtypes.push_back(AnfAlgo::GetOutputInferDataType(node_, i));
-  }
-  AnfAlgo::SetOutputInferTypeAndShape(dtypes, {AnfAlgo::GetOutputInferShape(node_, 0), out_shape, out_shape, out_shape},
-                                      node_.get());
+  UpdateShape(miss_count, node_);
 }
 }  // namespace kernel
 }  // namespace mindspore
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.h
index 7c747b92c0..7deeed5bf7 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_cache_idx_cpu_kernel.h
@@ -42,7 +42,7 @@ class MapCacheIdxCPUKernel : public CPUKernel {
   size_t batch_size_{1};
   size_t hashmap_length_{1};
   TypeId dtype_{kTypeUnknown};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(MapCacheIdx,
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.cc
index c16dddbbc3..90a7f665b1 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.cc
@@ -24,7 +24,7 @@ namespace mindspore {
 namespace kernel {
 void MapUniformCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 0);
 }
 
@@ -45,6 +45,10 @@ bool MapUniformCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
 template <typename T>
 void MapUniformCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
                                        const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto input_x_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 0);
   batch_size_ = 1;
   for (size_t i = 0; i < input_x_shape.size(); ++i) {
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.h
index b69959a9c3..67e41076c5 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/map_uniform_cpu_kernel.h
@@ -41,7 +41,7 @@ class MapUniformCPUKernel : public CPUKernel {
  private:
   size_t batch_size_{1};
   TypeId dtype_{kTypeUnknown};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(MapUniform,
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.cc
index 035201ca4b..995f602e52 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.cc
@@ -22,7 +22,7 @@ namespace mindspore {
 namespace kernel {
 void PadAndShiftCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   input_x_dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 0);
   type_size_ = GetTypeByte(TypeIdToType(input_x_dtype_));
   auto indices_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
@@ -77,6 +77,10 @@ void PadAndShiftCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
   std::vector<size_t> out_shape;
   out_shape.emplace_back(output_size);
   std::vector<TypeId> dtypes;
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto output_nums = AnfAlgo::GetOutputTensorNum(node_);
   for (size_t i = 0; i < output_nums; i++) {
     dtypes.push_back(AnfAlgo::GetOutputInferDataType(node_, i));
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.h
index 799a5d55ac..45be92c999 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/pad_and_shift_cpu_kernel.h
@@ -42,7 +42,7 @@ class PadAndShiftCPUKernel : public CPUKernel {
   size_t cum_sum_size_{1};
   size_t type_size_{4};
   TypeId input_x_dtype_{kTypeUnknown};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(PadAndShift,
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.cc
index 07f71be8f5..b97d151201 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.cc
@@ -20,7 +20,7 @@ namespace mindspore {
 namespace kernel {
 void ReshapeCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   x_data_type_ = AnfAlgo::GetInputDeviceDataType(kernel_node, 0);
   type_size_ = GetTypeByte(TypeIdToType(x_data_type_));
 }
@@ -28,6 +28,10 @@ void ReshapeCPUKernel::InitKernel(const CNodePtr &kernel_node) {
 bool ReshapeCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
                               const std::vector<kernel::AddressPtr> & /*workspace*/,
                               const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto x_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 0);
   if (inputs.empty() || outputs.empty()) {
     MS_LOG(EXCEPTION) << "input or output empty!";
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.h
index 90e8befdf9..35b91ecb22 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/reshape_cpu_kernel.h
@@ -33,7 +33,7 @@ class ReshapeCPUKernel : public CPUKernel {
               const std::vector<AddressPtr> &outputs) override;
 
  private:
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
   TypeId x_data_type_{kNumberTypeInt32};
   size_t type_size_ = 4;
 };
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.cc
index 6a8152e86b..b1f7e0c953 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.cc
@@ -22,7 +22,7 @@ namespace mindspore {
 namespace kernel {
 void SubAndFilterCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   input_x_dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 0);
 }
 
@@ -43,6 +43,10 @@ bool SubAndFilterCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs
 template <typename T>
 void SubAndFilterCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
                                          const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto indices_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 0);
 
   batch_size_ = 1;
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.h
index cdc0af1e7d..401ada45d1 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/sub_and_filter_cpu_kernel.h
@@ -40,7 +40,7 @@ class SubAndFilterCPUKernel : public CPUKernel {
  private:
   size_t batch_size_{1};
   TypeId input_x_dtype_{kTypeUnknown};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(SubAndFilter,
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.cc
index aa22342329..fbdabb2f31 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.cc
@@ -21,7 +21,7 @@ namespace mindspore {
 namespace kernel {
 const size_t kUseBucketUniqueSize = 100000;
 void UniqueCPUKernel::InitKernel(const CNodePtr &kernel_node) {
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
   CheckParam(kernel_node);
   auto input_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
   input_size_ = input_shape[0];
@@ -45,7 +45,11 @@ bool UniqueCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
   } else if (dtype_ == kNumberTypeFloat32) {
     LaunchKernel<float, int>(inputs, workspace, outputs);
   }
-  if (node_ != nullptr) {
+  if (!node_wpt_.expired()) {
+    auto node_ = node_wpt_.lock();
+    if (!node_) {
+      MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+    }
     std::vector<size_t> out_shape;
     out_shape.emplace_back(output_size_);
     std::vector<TypeId> dtypes;
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.h
index 45c3a2c0e7..4736441531 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/unique_cpu_kernel.h
@@ -60,7 +60,7 @@ class UniqueCPUKernel : public CPUKernel {
   size_t input_size_{0};
   TypeId dtype_{kTypeUnknown};
   size_t output_size_{0};
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 
   template <typename DataType>
   static size_t BucketId(DataType data, size_t bucket_num) {
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.cc
index 466fcd34e1..2251d5a9b3 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.cc
@@ -22,7 +22,7 @@ namespace mindspore {
 namespace kernel {
 void UpdateCacheCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   MS_EXCEPTION_IF_NULL(kernel_node);
-  node_ = kernel_node;
+  node_wpt_ = kernel_node;
 
   input_x_dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 0);
   indices_dtype_ = AnfAlgo::GetPrevNodeOutputInferDataType(kernel_node, 1);
@@ -53,6 +53,10 @@ bool UpdateCacheCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
 template <typename T>
 void UpdateCacheCPUKernel::LaunchKernel(const std::vector<AddressPtr> &inputs,
                                         const std::vector<kernel::AddressPtr> &outputs) {
+  auto node_ = node_wpt_.lock();
+  if (!node_) {
+    MS_LOG(EXCEPTION) << "node_wpt_ is expired.";
+  }
   auto indices_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 1);
   auto update_shape = AnfAlgo::GetPrevNodeOutputInferShape(node_, 2);
 
diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.h b/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.h
index 553535dfe8..935fdacf02 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.h
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/update_cache_cpu_kernel.h
@@ -46,7 +46,7 @@ class UpdateCacheCPUKernel : public CPUKernel {
   TypeId input_x_dtype_{kTypeUnknown};
   TypeId indices_dtype_{kTypeUnknown};
   size_t input_x_dtype_size_ = 4;
-  CNodePtr node_ = nullptr;
+  CNodeWeakPtr node_wpt_;
 };
 
 MS_REG_CPU_KERNEL(UpdateCache,
diff --git a/mindspore/core/ir/anf.h b/mindspore/core/ir/anf.h
index 966dc834ca..888eadbddf 100644
--- a/mindspore/core/ir/anf.h
+++ b/mindspore/core/ir/anf.h
@@ -62,6 +62,7 @@ using ValueNodePtr = std::shared_ptr<ValueNode>;
 class CNode;
 using CNodePtr = std::shared_ptr<CNode>;
 using CNodePtrList = std::vector<CNodePtr>;
+using CNodeWeakPtr = std::weak_ptr<CNode>;
 
 class FuncGraph;
 using FuncGraphSet = OrderedSet<FuncGraphPtr>;