diff --git a/src/observer/table/ob_table_session_pool.cpp b/src/observer/table/ob_table_session_pool.cpp
index 16a209f72c..0f61134eb9 100644
--- a/src/observer/table/ob_table_session_pool.cpp
+++ b/src/observer/table/ob_table_session_pool.cpp
@@ -258,7 +258,7 @@ int ObTableApiSessPoolMgr::ObTableApiSessEliminationTask::run_recycle_retired_se
 
 /*
   init session pool
-  - init key_node_map_ which is a hashmap, key is user_id, value is ObTableApiSessNode*
+  - init key_node_map_ which is a hashmap, key is ObTableApiCredential.hash_val_, value is ObTableApiSessNode*
 */
 int ObTableApiSessPool::init(int64_t hash_bucket/* = SESS_POOL_DEFAULT_BUCKET_NUM */)
 {
@@ -432,7 +432,7 @@ int ObTableApiSessPool::get_sess_node(uint64_t key,
     3.1 if there is no session node val in node list, extend it.
 
   struct pool {
-    map: [user_id0:node1][user_id2:node:2]
+    map: [key1:node1][key2:node:2]
   }
 
   struct node {
@@ -445,7 +445,7 @@ int ObTableApiSessPool::get_sess_info(ObTableApiCredential &credential, ObTableA
   ObTableApiSessNode *sess_node = nullptr;
   bool need_extend = false;
 
-  if (OB_FAIL(get_sess_node(credential.user_id_, sess_node))) { // first get
+  if (OB_FAIL(get_sess_node(credential.hash_val_, sess_node))) { // first get
     if (OB_HASH_NOT_EXIST != ret) {
       LOG_WARN("fail to get sess node", K(ret), K(credential));
     }
@@ -455,7 +455,7 @@ int ObTableApiSessPool::get_sess_info(ObTableApiCredential &credential, ObTableA
     // do nothing
   } else if (OB_UNLIKELY(OB_HASH_NOT_EXIST == ret) && OB_FAIL(create_and_add_node_safe(credential))) { // not exist, create
     LOG_WARN("fail to create and add session node", K(ret), K(credential));
-  } else if (OB_UNLIKELY(OB_ISNULL(sess_node)) && OB_FAIL(get_sess_node(credential.user_id_, sess_node))) { // get again
+  } else if (OB_UNLIKELY(OB_ISNULL(sess_node)) && OB_FAIL(get_sess_node(credential.hash_val_, sess_node))) { // get again
     LOG_WARN("fail to get sess node", K(ret), K(credential));
   } else if (OB_UNLIKELY(OB_ISNULL(sess_node))) {
     ret = OB_ERR_UNEXPECTED;
@@ -511,9 +511,9 @@ int ObTableApiSessPool::create_and_add_node_safe(ObTableApiCredential &credentia
   ObTableApiSessNode *node = nullptr;
   if (OB_FAIL(create_node_safe(credential, node))) {
     LOG_WARN("fail to create node", K(ret), K(credential));
-  } else if (OB_FAIL(key_node_map_.set_refactored(credential.user_id_, node))) {
+  } else if (OB_FAIL(key_node_map_.set_refactored(credential.hash_val_, node))) {
     if (OB_HASH_EXIST != ret) {
-      LOG_WARN("fail to add sess node to hash map", K(ret), K(credential.user_id_), K(*node));
+      LOG_WARN("fail to add sess node to hash map", K(ret), K(credential), K(*node));
     }
     // this node has been set by other thread, free it
     ObLockGuard<ObSpinLock> guard(lock_);
@@ -534,7 +534,7 @@ int ObTableApiSessPool::update_sess(ObTableApiCredential &credential)
   int ret = OB_SUCCESS;
 
   ObTableApiSessNode *node = nullptr;
-  const uint64_t key = credential.user_id_;
+  const uint64_t key = credential.hash_val_;
   if (OB_FAIL(get_sess_node(key, node))) {
     if (OB_HASH_NOT_EXIST == ret) { // not exist, create
       if (OB_FAIL(create_and_add_node_safe(credential))) {
@@ -556,7 +556,7 @@ int ObTableApiSessPool::replace_sess_node_safe(ObTableApiCredential &credential)
   int ret = OB_SUCCESS;
 
   ObTableApiSessNodeReplaceOp replace_callback(*this, credential);
-  if (OB_FAIL(key_node_map_.atomic_refactored(credential.user_id_, replace_callback))) {
+  if (OB_FAIL(key_node_map_.atomic_refactored(credential.hash_val_, replace_callback))) {
     LOG_WARN("fail to replace session", K(ret), K(credential));
   }
 
diff --git a/src/observer/table/ob_table_session_pool.h b/src/observer/table/ob_table_session_pool.h
index 00ba0dda48..b98957f84b 100644
--- a/src/observer/table/ob_table_session_pool.h
+++ b/src/observer/table/ob_table_session_pool.h
@@ -85,7 +85,7 @@ private:
 class ObTableApiSessPool final
 {
 public:
-  // key is user_id
+  // key is ObTableApiCredential.hash_val_
   typedef common::hash::ObHashMap<uint64_t, ObTableApiSessNode*> CacheKeyNodeMap;
   static const int64_t SESS_POOL_DEFAULT_BUCKET_NUM = 10; // 取决于客户端登录的用户数量
   static const int64_t SESS_RETIRE_TIME = 300 * 1000000; // 超过300s未被访问的session会被标记淘汰
diff --git a/unittest/observer/table/test_table_sess_pool.cpp b/unittest/observer/table/test_table_sess_pool.cpp
index 60e09b6392..bb43bd9ae3 100644
--- a/unittest/observer/table/test_table_sess_pool.cpp
+++ b/unittest/observer/table/test_table_sess_pool.cpp
@@ -113,7 +113,7 @@ TEST_F(TestTableSessPool, mgr_get_session)
   ASSERT_EQ(1, mgr->pool_->key_node_map_.size());
   ASSERT_EQ(0, mgr->pool_->retired_nodes_.size_);
   ObTableApiSessNode *node;
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->hash_val_, node));
   ASSERT_NE(nullptr, node);
   ASSERT_TRUE(node->sess_lists_.free_list_.is_empty());
   ASSERT_TRUE(node->sess_lists_.used_list_.is_empty());
@@ -144,7 +144,7 @@ TEST_F(TestTableSessPool, mgr_update_session)
   ASSERT_EQ(1, mgr->pool_->key_node_map_.size());
   ASSERT_EQ(0, mgr->pool_->retired_nodes_.size_);
   ObTableApiSessNode *node;
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->hash_val_, node));
   ASSERT_NE(nullptr, node);
   ASSERT_TRUE(node->sess_lists_.free_list_.is_empty());
   ASSERT_TRUE(node->sess_lists_.used_list_.is_empty());
@@ -159,7 +159,7 @@ TEST_F(TestTableSessPool, mgr_update_session)
   ASSERT_EQ(1, mgr->pool_->key_node_map_.size());
   ASSERT_EQ(1, mgr->pool_->retired_nodes_.size_);
   ASSERT_EQ(node, mgr->pool_->retired_nodes_.get_last());
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(new_cred->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(new_cred->hash_val_, node));
   ASSERT_NE(nullptr, node);
   ASSERT_TRUE(node->sess_lists_.free_list_.is_empty());
   ASSERT_TRUE(node->sess_lists_.used_list_.is_empty());
@@ -172,7 +172,7 @@ TEST_F(TestTableSessPool, mgr_update_session)
   ASSERT_TRUE(mgr->pool_->is_inited_);
   ASSERT_EQ(2, mgr->pool_->key_node_map_.size());
   ASSERT_EQ(1, mgr->pool_->retired_nodes_.size_);
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(new_cred->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(new_cred->hash_val_, node));
   ASSERT_NE(nullptr, node);
   ASSERT_TRUE(node->sess_lists_.free_list_.is_empty());
   ASSERT_TRUE(node->sess_lists_.used_list_.is_empty());
@@ -186,7 +186,7 @@ TEST_F(TestTableSessPool, mgr_destroy)
   ASSERT_EQ(OB_SUCCESS, mgr->update_sess(*mock_cred_));
   ASSERT_NE(nullptr, mgr->pool_);
   ObTableApiSessNode *node;
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->hash_val_, node));
   mgr->destroy();
   ASSERT_FALSE(mgr->is_inited_);
   ASSERT_EQ(nullptr, mgr->pool_);
@@ -203,7 +203,7 @@ TEST_F(TestTableSessPool, mgr_sess_recycle)
 
   // add mock val to node
   ObTableApiSessNode *node;
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->hash_val_, node));
   ObTableApiSessNodeVal val(node);
   val.is_inited_ = true;
   ASSERT_EQ(true, node->sess_lists_.free_list_.add_last(&val));
@@ -216,7 +216,7 @@ TEST_F(TestTableSessPool, mgr_sess_recycle)
   guard.~ObTableApiSessGuard();
 
   // 3min not access
-  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->user_id_, node));
+  ASSERT_EQ(OB_SUCCESS, mgr->pool_->get_sess_node(mock_cred_->hash_val_, node));
   node->last_active_ts_ = node->last_active_ts_ - ObTableApiSessPool::SESS_RETIRE_TIME;
   mgr->elimination_task_.run_retire_sess_task();
   ASSERT_EQ(0, mgr->pool_->key_node_map_.size());