diff --git a/mittest/logservice/env/ob_simple_log_server.cpp b/mittest/logservice/env/ob_simple_log_server.cpp
index cbda59101..416558d06 100644
--- a/mittest/logservice/env/ob_simple_log_server.cpp
+++ b/mittest/logservice/env/ob_simple_log_server.cpp
@@ -744,6 +744,7 @@ void ObLogDeliver::handle(void *task)
     ret = OB_NOT_INIT;
     SERVER_LOG(WARN, "ObLogDeliver not init", K(ret));
   } else if (OB_ISNULL(task)) {
+    ret = OB_ERR_UNEXPECTED;
     SERVER_LOG(WARN, "invalid argument", KP(task));
   } else {
     rpc::ObRequest *req = static_cast<rpc::ObRequest *>(task);
diff --git a/mittest/palf_cluster/test_palf_bench_client.cpp b/mittest/palf_cluster/test_palf_bench_client.cpp
index 2a72b36c0..554351a65 100644
--- a/mittest/palf_cluster/test_palf_bench_client.cpp
+++ b/mittest/palf_cluster/test_palf_bench_client.cpp
@@ -76,6 +76,7 @@ public:
     }
 
     if (OB_ISNULL(log_service)) {
+      ret = OB_ERR_UNEXPECTED;
       CLOG_LOG(ERROR, "get_log_service failed");
     } else if (FALSE_IT(rpc_proxy = log_service->get_rpc_proxy())) {
     } else if (FALSE_IT(self = log_service->get_self())) {
@@ -137,4 +138,4 @@ int main(int argc, char **argv)
     oceanbase::unittest::replica_num_arg = strtol(argv[4], NULL, 10);
   }
   RUN_SIMPLE_LOG_CLUSTER_TEST(TEST_NAME);
-}
\ No newline at end of file
+}