diff --git a/mittest/logservice/test_ob_simple_log_single_replica_func.cpp b/mittest/logservice/test_ob_simple_log_single_replica_func.cpp
index 9e9c859c10..e595e15748 100644
--- a/mittest/logservice/test_ob_simple_log_single_replica_func.cpp
+++ b/mittest/logservice/test_ob_simple_log_single_replica_func.cpp
@@ -1825,7 +1825,7 @@ TEST_F(TestObSimpleLogClusterSingleReplica, test_iow_memleak)
     // case2: palf epoch has been changed during after_consume
     IOTaskConsumeCond consume_cond(id, leader.palf_env_impl_->last_palf_epoch_);
     EXPECT_EQ(OB_SUCCESS, iow->submit_io_task(&consume_cond));
-    sleep(1);
+    sleep(3);
     EXPECT_EQ(OB_SUCCESS, leader.get_palf_handle_impl()->set_base_lsn(end_lsn));
     EXPECT_EQ(OB_SUCCESS, submit_log(leader, 1, leader_idx, MAX_LOG_BODY_SIZE));
     EXPECT_EQ(OB_SUCCESS, leader.get_palf_handle_impl()->log_engine_.submit_purge_throttling_task(PurgeThrottlingType::PURGE_BY_GET_MC_REQ));
@@ -1853,6 +1853,43 @@ TEST_F(TestObSimpleLogClusterSingleReplica, test_iow_memleak)
   }
 }
 
+TEST_F(TestObSimpleLogClusterSingleReplica, test_log_service_interface)
+{
+  SET_CASE_LOG_FILE(TEST_NAME, "test_log_service_interface");
+  int64_t id = ATOMIC_AAF(&palf_id_, 1);
+  ObSimpleLogServer *log_server = dynamic_cast<ObSimpleLogServer*>(get_cluster()[0]);
+  ASSERT_NE(nullptr, log_server);
+  ObLogService *log_service = &log_server->log_service_;
+  ObTenantRole tenant_role; tenant_role.value_ = ObTenantRole::Role::PRIMARY_TENANT;
+  PalfBaseInfo palf_base_info; palf_base_info.generate_by_default();
+  ObLogHandler log_handler; ObLogRestoreHandler restore_handler;
+  ObLogApplyService *apply_service = &log_service->apply_service_;
+  ObReplicaType replica_type;
+  ObLSID ls_id(id);
+  ObApplyStatus *apply_status = nullptr;
+  ASSERT_NE(nullptr, apply_status = static_cast<ObApplyStatus*>(mtl_malloc(sizeof(ObApplyStatus), "mittest")));
+  new (apply_status) ObApplyStatus();
+  apply_status->inc_ref();
+  EXPECT_EQ(OB_SUCCESS, log_service->start());
+  EXPECT_EQ(OB_SUCCESS, apply_service->apply_status_map_.insert(ls_id, apply_status));
+  apply_service->is_running_ = true;
+  EXPECT_EQ(OB_ENTRY_EXIST, log_service->create_ls(ls_id, REPLICA_TYPE_FULL, tenant_role, palf_base_info, true, log_handler, restore_handler));
+  bool is_exist = false;
+  EXPECT_EQ(OB_SUCCESS, log_service->check_palf_exist(ls_id, is_exist));
+  EXPECT_EQ(is_exist, false);
+  EXPECT_EQ(OB_ENTRY_NOT_EXIST, apply_service->apply_status_map_.erase(ls_id));
+  EXPECT_EQ(OB_SUCCESS, log_service->create_ls(ls_id, REPLICA_TYPE_FULL, tenant_role, palf_base_info, true, log_handler, restore_handler));
+  EXPECT_EQ(OB_ENTRY_EXIST, log_service->create_ls(ls_id, REPLICA_TYPE_FULL, tenant_role, palf_base_info, true, log_handler, restore_handler));
+  EXPECT_EQ(OB_SUCCESS, log_service->check_palf_exist(ls_id, is_exist));
+  EXPECT_EQ(is_exist, true);
+  const char *log_dir = log_service->palf_env_->palf_env_impl_.log_dir_;
+  bool result = false;
+  EXPECT_EQ(OB_SUCCESS, FileDirectoryUtils::is_empty_directory(log_dir, result));
+  EXPECT_EQ(false, result);
+  EXPECT_EQ(OB_SUCCESS, log_service->remove_ls(ls_id, log_handler, restore_handler));
+  EXPECT_EQ(OB_SUCCESS, log_service->check_palf_exist(ls_id, is_exist));
+}
+
 } // namespace unittest
 } // namespace oceanbase
 
diff --git a/src/logservice/ob_log_handler.cpp b/src/logservice/ob_log_handler.cpp
index 88186d98b0..49e5ff6d8c 100755
--- a/src/logservice/ob_log_handler.cpp
+++ b/src/logservice/ob_log_handler.cpp
@@ -62,7 +62,6 @@ int ObLogHandler::init(const int64_t id,
                        ObLogApplyService *apply_service,
                        ObLogReplayService *replay_service,
                        ObRoleChangeService *rc_service,
-                       PalfHandle &palf_handle,
                        PalfEnv *palf_env,
                        PalfLocationCacheCb *lc_cb,
                        obrpc::ObLogServiceRpcProxy *rpc_proxy)
@@ -73,18 +72,19 @@ int ObLogHandler::init(const int64_t id,
   share::ObLSID ls_id(id);
   if (IS_INIT) {
     ret = OB_INIT_TWICE;
-  } else if (false == palf_handle.is_valid() ||
-             OB_ISNULL(palf_env) ||
+  } else if (OB_ISNULL(palf_env) ||
              OB_ISNULL(apply_service) ||
              OB_ISNULL(lc_cb) ||
              OB_ISNULL(rpc_proxy)) {
     ret = OB_INVALID_ARGUMENT;
-    CLOG_LOG(WARN, "invalid arguments", K(palf_handle), KP(palf_env), KP(lc_cb), KP(rpc_proxy));
+    CLOG_LOG(WARN, "invalid arguments", K(id), KP(palf_env), KP(lc_cb), KP(rpc_proxy));
   } else if (OB_FAIL(apply_service->get_apply_status(ls_id, guard))) {
     CLOG_LOG(WARN, "guard get apply status failed", K(ret), K(id));
   } else if (NULL == (apply_status_ = guard.get_apply_status())) {
     ret = OB_ERR_UNEXPECTED;
     CLOG_LOG(WARN, "apply status is not exist", K(ret), K(id));
+  } else if (OB_FAIL(palf_env->open(id, palf_handle_))) {
+    CLOG_LOG(WARN, "open palf failed", K(ret), K(id));
   } else {
     get_max_decided_scn_debug_time_ = OB_INVALID_TIMESTAMP;
     apply_service_ = apply_service;
@@ -95,7 +95,6 @@ int ObLogHandler::init(const int64_t id,
     append_cost_stat_.set_extra_info(EXTRA_INFOS);
     id_ = id;
     self_ = self;
-    palf_handle_ = palf_handle;
     palf_env_ = palf_env;
     role_ = FOLLOWER;
     lc_cb_ = lc_cb;
@@ -103,7 +102,10 @@ int ObLogHandler::init(const int64_t id,
     is_in_stop_state_ = false;
     is_offline_ = true; // offline at default.
     is_inited_ = true;
-    FLOG_INFO("ObLogHandler init success", K(id), K(palf_handle));
+    FLOG_INFO("ObLogHandler init success", K(id));
+  }
+  if (OB_FAIL(ret) && OB_INIT_TWICE != ret) {
+    destroy();
   }
   return ret;
 }
@@ -180,26 +182,25 @@ int ObLogHandler::safe_to_destroy(bool &is_safe_destroy)
 void ObLogHandler::destroy()
 {
   WLockGuard guard(lock_);
-  int ret = OB_SUCCESS;
-  if (IS_INIT) {
-    is_inited_ = false;
-    is_offline_ = false;
-    is_in_stop_state_ = true;
-    common::TCWLockGuard deps_guard(deps_lock_);
+  is_inited_ = false;
+  is_offline_ = false;
+  is_in_stop_state_ = true;
+  common::TCWLockGuard deps_guard(deps_lock_);
+  if (NULL != apply_service_ && NULL != apply_status_) {
     apply_service_->revert_apply_status(apply_status_);
-    apply_status_ = NULL;
-    apply_service_ = NULL;
-    replay_service_ = NULL;
-    if (true == palf_handle_.is_valid()) {
-      palf_env_->close(palf_handle_);
-    }
-    rc_service_ = NULL;
-    lc_cb_ = NULL;
-    rpc_proxy_ = NULL;
-    palf_env_ = NULL;
-    id_ = -1;
-    get_max_decided_scn_debug_time_ = OB_INVALID_TIMESTAMP;
   }
+  apply_status_ = NULL;
+  apply_service_ = NULL;
+  replay_service_ = NULL;
+  if (NULL != palf_env_ && true == palf_handle_.is_valid()) {
+    palf_env_->close(palf_handle_);
+  }
+  rc_service_ = NULL;
+  lc_cb_ = NULL;
+  rpc_proxy_ = NULL;
+  palf_env_ = NULL;
+  id_ = -1;
+  get_max_decided_scn_debug_time_ = OB_INVALID_TIMESTAMP;
 }
 
 int ObLogHandler::append(const void *buffer,
diff --git a/src/logservice/ob_log_handler.h b/src/logservice/ob_log_handler.h
index 1945598135..663fd2bf79 100755
--- a/src/logservice/ob_log_handler.h
+++ b/src/logservice/ob_log_handler.h
@@ -196,7 +196,6 @@ public:
            ObLogApplyService *apply_service,
            ObLogReplayService *replay_service,
            ObRoleChangeService *rc_service,
-           palf::PalfHandle &palf_handle,
            palf::PalfEnv *palf_env,
            palf::PalfLocationCacheCb *lc_cb,
            obrpc::ObLogServiceRpcProxy *rpc_proxy);
diff --git a/src/logservice/ob_log_service.cpp b/src/logservice/ob_log_service.cpp
index 0d060f73a7..2520373edd 100644
--- a/src/logservice/ob_log_service.cpp
+++ b/src/logservice/ob_log_service.cpp
@@ -409,22 +409,19 @@ int ObLogService::add_ls(const ObLSID &id,
                          ObLogRestoreHandler &restore_handler)
 {
   int ret = OB_SUCCESS;
-  PalfHandle palf_handle;
   PalfHandle &log_handler_palf_handle = log_handler.palf_handle_;
   PalfRoleChangeCb *rc_cb = &role_change_service_;
   PalfLocationCacheCb *loc_cache_cb = &location_adapter_;
   if (IS_NOT_INIT) {
     ret = OB_NOT_INIT;
     CLOG_LOG(WARN, "log_service is not inited", K(ret), K(id));
-  } else if (OB_FAIL(palf_env_->open(id.id(), palf_handle))) {
-    CLOG_LOG(WARN, "failed to get palf_handle", K(ret), K(id));
   } else if (OB_FAIL(apply_service_.add_ls(id))) {
     CLOG_LOG(WARN, "failed to add_ls for apply_service", K(ret), K(id));
   } else if (OB_FAIL(replay_service_.add_ls(id))) {
     CLOG_LOG(WARN, "failed to add_ls for replay_service", K(ret), K(id));
   } else if (OB_FAIL(log_handler.init(id.id(), self_, &apply_service_, &replay_service_,
-          &role_change_service_, palf_handle, palf_env_, loc_cache_cb, &rpc_proxy_))) {
-    CLOG_LOG(WARN, "ObLogHandler init failed", K(ret), K(id), KP(palf_env_), K(palf_handle));
+          &role_change_service_, palf_env_, loc_cache_cb, &rpc_proxy_))) {
+    CLOG_LOG(WARN, "ObLogHandler init failed", K(ret), K(id), KP(palf_env_));
   } else if (OB_FAIL(restore_handler.init(id.id(), palf_env_))) {
     CLOG_LOG(WARN, "ObLogRestoreHandler init failed", K(ret), K(id), KP(palf_env_));
   } else if (OB_FAIL(log_handler_palf_handle.register_role_change_cb(rc_cb))) {
@@ -435,12 +432,6 @@ int ObLogService::add_ls(const ObLSID &id,
     FLOG_INFO("add_ls success", K(ret), K(id), KP(this));
   }
 
-  if (OB_FAIL(ret)) {
-    if (true == palf_handle.is_valid() && false == log_handler.is_valid()) {
-      palf_env_->close(palf_handle);
-    }
-  }
-
   if (OB_ENTRY_NOT_EXIST == ret) {
     ret = OB_LS_NOT_EXIST;
   }
@@ -656,36 +647,51 @@ int ObLogService::create_ls_(const share::ObLSID &id,
   PalfLocationCacheCb *loc_cache_cb = &location_adapter_;
   const bool is_arb_replica = (replica_type == REPLICA_TYPE_ARBITRATION);
   PalfHandle &log_handler_palf_handle = log_handler.palf_handle_;
+  bool palf_exist = true;
   if (false == id.is_valid() ||
       INVALID_TENANT_ROLE == tenant_role ||
       false == palf_base_info.is_valid()) {
     ret = OB_INVALID_ARGUMENT;
-    CLOG_LOG(WARN, "invalid argument", K(ret), K(id), K(id), K(tenant_role), K(palf_base_info));
-  } else if (!is_arb_replica &&
-      OB_FAIL(palf_env_->create(id.id(), get_palf_access_mode(tenant_role), palf_base_info, palf_handle))) {
-    CLOG_LOG(WARN, "failed to get palf_handle", K(ret), K(id), K(replica_type));
-  } else if (false == allow_log_sync && OB_FAIL(palf_handle.disable_sync())) {
-    CLOG_LOG(WARN, "failed to disable_sync", K(ret), K(id));
-  } else if (OB_FAIL(apply_service_.add_ls(id))) {
-    CLOG_LOG(WARN, "failed to add_ls for apply engine", K(ret), K(id));
-  } else if (OB_FAIL(replay_service_.add_ls(id))) {
-    CLOG_LOG(WARN, "failed to add_ls", K(ret), K(id));
-  } else if (OB_FAIL(log_handler.init(id.id(), self_, &apply_service_, &replay_service_,
-          &role_change_service_, palf_handle, palf_env_, loc_cache_cb, &rpc_proxy_))) {
-    CLOG_LOG(WARN, "ObLogHandler init failed", K(ret), KP(palf_env_), K(palf_handle));
-  } else if (OB_FAIL(restore_handler.init(id.id(), palf_env_))) {
-    CLOG_LOG(WARN, "ObLogRestoreHandler init failed", K(ret), K(id), KP(palf_env_));
-  } else if (OB_FAIL(log_handler_palf_handle.register_role_change_cb(rc_cb))) {
-    CLOG_LOG(WARN, "register_role_change_cb failed", K(ret), K(id));
-  } else if (OB_FAIL(log_handler_palf_handle.set_location_cache_cb(loc_cache_cb))) {
-    CLOG_LOG(WARN, "set_location_cache_cb failed", K(ret), K(id));
+    CLOG_LOG(WARN, "invalid argument", K(ret), K(id), K(tenant_role), K(palf_base_info));
+  } else if (OB_FAIL(check_palf_exist(id, palf_exist))) {
+    CLOG_LOG(WARN, "check_palf_exist failed", K(ret), K(id), K(tenant_role), K(palf_base_info));
+  } else if (palf_exist) {
+    ret = OB_ENTRY_EXIST;
+    CLOG_LOG(WARN, "palf has eixst", K(ret), K(id), K(tenant_role), K(palf_base_info));
   } else {
-    CLOG_LOG(INFO, "ObLogService create_ls success", K(ret), K(id), K(log_handler));
-  }
-  if (OB_FAIL(ret)) {
-    if (true == palf_handle.is_valid() && false == log_handler.is_valid()) {
+    if (!is_arb_replica &&
+        OB_FAIL(palf_env_->create(id.id(), get_palf_access_mode(tenant_role), palf_base_info, palf_handle))) {
+      CLOG_LOG(WARN, "failed to get palf_handle", K(ret), K(id), K(replica_type));
+    } else if (false == allow_log_sync && OB_FAIL(palf_handle.disable_sync())) {
+      CLOG_LOG(WARN, "failed to disable_sync", K(ret), K(id));
+    } else if (OB_FAIL(apply_service_.add_ls(id))) {
+      CLOG_LOG(WARN, "failed to add_ls for apply engine", K(ret), K(id));
+    } else if (OB_FAIL(replay_service_.add_ls(id))) {
+      CLOG_LOG(WARN, "failed to add_ls", K(ret), K(id));
+    } else if (OB_FAIL(log_handler.init(id.id(), self_, &apply_service_, &replay_service_,
+            &role_change_service_, palf_env_, loc_cache_cb, &rpc_proxy_))) {
+      CLOG_LOG(WARN, "ObLogHandler init failed", K(ret), KP(palf_env_), K(palf_handle));
+    } else if (OB_FAIL(restore_handler.init(id.id(), palf_env_))) {
+      CLOG_LOG(WARN, "ObLogRestoreHandler init failed", K(ret), K(id), KP(palf_env_));
+    } else if (OB_FAIL(log_handler_palf_handle.register_role_change_cb(rc_cb))) {
+      CLOG_LOG(WARN, "register_role_change_cb failed", K(ret), K(id));
+    } else if (OB_FAIL(log_handler_palf_handle.set_location_cache_cb(loc_cache_cb))) {
+      CLOG_LOG(WARN, "set_location_cache_cb failed", K(ret), K(id));
+    } else {
+      CLOG_LOG(INFO, "ObLogService create_ls success", K(ret), K(id), K(log_handler));
+    }
+    if (palf_handle.is_valid() && nullptr != palf_env_) {
       palf_env_->close(palf_handle);
     }
+    if (OB_FAIL(ret)) {
+      CLOG_LOG(ERROR, "create_ls failed!!!", KR(ret), K(id));
+      restore_handler.destroy();
+      replay_service_.remove_ls(id);
+      apply_service_.remove_ls(id);
+      log_handler.destroy();
+      palf_env_->close(palf_handle);
+      palf_env_->remove(id.id());
+    }
   }
   return ret;
 }
diff --git a/src/observer/omt/ob_multi_tenant.cpp b/src/observer/omt/ob_multi_tenant.cpp
index be6ba1894a..d1088d7095 100644
--- a/src/observer/omt/ob_multi_tenant.cpp
+++ b/src/observer/omt/ob_multi_tenant.cpp
@@ -1801,6 +1801,16 @@ int ObMultiTenant::clear_persistent_data(const uint64_t tenant_id)
   } else if (OB_FAIL(FileDirectoryUtils::is_exists(tenant_clog_dir, exist))) {
     LOG_WARN("fail to check exist", K(ret));
   } else if (exist) {
+    // defense code begin
+    int tmp_ret = OB_SUCCESS;
+    bool directory_empty = true;
+    if (OB_TMP_FAIL(FileDirectoryUtils::is_empty_directory(tenant_clog_dir, directory_empty))) {
+      LOG_WARN("fail to check directory whether is empty", KR(tmp_ret), K(tenant_clog_dir));
+    }
+    if (!directory_empty) {
+      LOG_DBA_ERROR(OB_ERR_UNEXPECTED, "msg", "clog directory must be empty when delete tenant", K(tenant_clog_dir));
+    }
+    // defense code end
     if (OB_FAIL(FileDirectoryUtils::delete_directory_rec(tenant_clog_dir))) {
       LOG_WARN("fail to delete clog dir", K(ret), K(tenant_clog_dir));
     }