diff --git a/src/adapter/adapter.c b/src/adapter/adapter.c
index 507d5236..94c6775c 100644
--- a/src/adapter/adapter.c
+++ b/src/adapter/adapter.c
@@ -469,8 +469,6 @@ static int adapter_command(neu_adapter_t *adapter, neu_reqresp_head_t header,
 static int adapter_response(neu_adapter_t *adapter, neu_reqresp_head_t *header,
                             void *data)
 {
-    int ret = 0;
-
     switch (header->type) {
     case NEU_REQRESP_TRANS_DATA:
         strcpy(header->sender, adapter->name);
@@ -482,16 +480,7 @@ static int adapter_response(neu_adapter_t *adapter, neu_reqresp_head_t *header,
 
     nng_msg *msg = neu_msg_gen(header, data);
 
-    ret = nng_sendmsg(adapter->nng.sock, msg, 0);
-    // ret = nng_sendmsg(adapter->nng.sock, msg, NNG_FLAG_NONBLOCK);
-    // if (ret == NNG_EAGAIN) {
-    //}
-    if (ret != 0) {
-        nlog_warn("sendmsg error: %d", ret);
-        nng_msg_free(msg);
-    }
-
-    return ret;
+    return nng_sendmsg(adapter->nng.sock, msg, 0);
 }
 
 // clang-format off
diff --git a/src/connection/connection.c b/src/connection/connection.c
index 6cf8e404..27e1c89b 100644
--- a/src/connection/connection.c
+++ b/src/connection/connection.c
@@ -367,6 +367,10 @@ void neu_conn_flush(neu_conn_t *conn)
 void neu_conn_disconnect(neu_conn_t *conn)
 {
     conn_disconnect(conn);
+    if (conn->callback_trigger == true) {
+        conn->disconnected(conn->data, conn->fd);
+        conn->callback_trigger = false;
+    }
 }
 
 static void conn_free_param(neu_conn_t *conn)
@@ -610,7 +614,7 @@ static void conn_connect(neu_conn_t *conn)
     case NEU_CONN_TTY_CLIENT: {
         struct termios tty_opt = { 0 };
 
-        fd                  = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY, 0);
+        fd = open(conn->param.params.tty_client.device, O_RDWR | O_NOCTTY, 0);
         tty_opt.c_cc[VTIME] = conn->param.params.tty_client.timeout / 100;
         tty_opt.c_cc[VMIN]  = 0;
 
diff --git a/tests/http_test.cc b/tests/http_test.cc
index 2c757beb..d8170fd0 100644
--- a/tests/http_test.cc
+++ b/tests/http_test.cc
@@ -58,7 +58,7 @@ TEST(HTTPTest, http_get_param)
     nng_url_parse(&url, "http://127.0.0.1");
     nng_http_req_alloc(&req, url);
 
-    for (int i = 0; i < sizeof(data) / sizeof(query_param_data_t); ++i) {
+    for (uint64_t i = 0; i < sizeof(data) / sizeof(query_param_data_t); ++i) {
         nng_http_req_set_uri(req, (char *) data[i].uri);
         nng_aio_set_input(aio, 0, req);
         len             = 0;
@@ -135,7 +135,7 @@ TEST(HTTPTest, http_get_param_node_id)
     nng_url_parse(&url, "http://127.0.0.1");
     nng_http_req_alloc(&req, url);
 
-    for (int i = 0; i < sizeof(data) / sizeof(query_node_id_data_t); ++i) {
+    for (uint64_t i = 0; i < sizeof(data) / sizeof(query_node_id_data_t); ++i) {
         neu_node_id_t prev_node_id = node_id;
         nng_http_req_set_uri(req, (char *) data[i].uri);
         nng_aio_set_input(aio, 0, req);
diff --git a/tests/jwt_test.cc b/tests/jwt_test.cc
index d451e84f..da4e1c13 100644
--- a/tests/jwt_test.cc
+++ b/tests/jwt_test.cc
@@ -10,9 +10,7 @@
 zlog_category_t *neuron = NULL;
 TEST(JwtTest, SetJwt)
 {
-    char *        token            = NULL;
-    unsigned char public_key[4096] = { 0 };
-    size_t        pub_key_len      = 0;
+    char *token = NULL;
 
     EXPECT_EQ(0, neu_jwt_init((char *) "./config"));
 
@@ -24,11 +22,8 @@ TEST(JwtTest, SetJwt)
 
 TEST(JwtTest, JwtValidate)
 {
-    char *         token            = NULL;
-    char           b_token[1024]    = { 0 };
-    unsigned char  public_key[4096] = { 0 };
-    size_t         pub_key_len      = 0;
-    struct timeval expire_tv        = { 0 };
+    char *token         = NULL;
+    char  b_token[1024] = { 0 };
 
     EXPECT_EQ(0, neu_jwt_init((char *) "./config"));
     EXPECT_EQ(0, neu_jwt_new(&token));