diff --git a/plugins/mqtt/mqtt_plugin_intf.c b/plugins/mqtt/mqtt_plugin_intf.c
index b9fa7fa64..61435a653 100644
--- a/plugins/mqtt/mqtt_plugin_intf.c
+++ b/plugins/mqtt/mqtt_plugin_intf.c
@@ -167,6 +167,7 @@ int mqtt_plugin_uninit(neu_plugin_t *plugin)
 
     mqtt_config_fini(&plugin->config);
     if (plugin->client) {
+        neu_mqtt_client_remove_cache_db(plugin->client);
         neu_mqtt_client_close(plugin->client);
         neu_mqtt_client_free(plugin->client);
         plugin->client = NULL;
@@ -395,6 +396,7 @@ int mqtt_plugin_config(neu_plugin_t *plugin, const char *setting)
     }
 
     if (plugin->client != NULL) {
+        neu_mqtt_client_remove_cache_db(plugin->client);
         neu_mqtt_client_close(plugin->client);
         neu_mqtt_client_free(plugin->client);
     }
diff --git a/plugins/restful/global_config_handle.c b/plugins/restful/global_config_handle.c
index c701924d9..03c67ca8b 100644
--- a/plugins/restful/global_config_handle.c
+++ b/plugins/restful/global_config_handle.c
@@ -733,7 +733,6 @@ static void put_apps_context_next(context_t *ctx, neu_reqresp_type_e type,
         for (; ctx->idx < (size_t) apps->n_app; ++ctx->idx) {
             neu_json_app_t *app = &apps->apps[ctx->idx];
             if (is_default_app_node(app->node.name, app->node.plugin)) {
-                NEXT(ctx, add_app_tags, app);
                 if (NULL == app->node.setting) {
                     continue;
                 }
@@ -764,6 +763,7 @@ static void put_apps_context_next(context_t *ctx, neu_reqresp_type_e type,
         for (; ctx->idx < (size_t) apps->n_app; ++ctx->idx) {
             neu_json_app_t *app = &apps->apps[ctx->idx];
             NEXT(ctx, add_app_tags, app);
+
             ++ctx->idx;
             goto done;
         }
@@ -1798,10 +1798,11 @@ static int add_app_node(context_t *ctx, neu_json_app_t *app)
     neu_req_add_node_t cmd = { 0 };
     strcpy(cmd.node, app->node.name);
     strcpy(cmd.plugin, app->node.plugin);
-    cmd.setting       = app->node.setting;
-    cmd.tags          = app->node.tags;
+    cmd.setting = app->node.setting;
+    if (app->node.tags != NULL) {
+        cmd.tags = strdup(app->node.tags);
+    }
     app->node.setting = NULL;
-    app->node.tags    = NULL;
 
     if (0 != neu_plugin_op(plugin, header, &cmd)) {
         return NEU_ERR_IS_BUSY;
diff --git a/src/connection/connection.c b/src/connection/connection.c
index b37041e3a..62a10ae06 100644
--- a/src/connection/connection.c
+++ b/src/connection/connection.c
@@ -751,6 +751,7 @@ static void conn_tcp_server_listen(neu_conn_t *conn)
             };
 
             fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
+            setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &(int) { 1 }, sizeof(int));
 
             ret = bind(fd, (struct sockaddr *) &local, sizeof(local));
         } else if (is_ipv6(conn->param.params.tcp_server.ip)) {
@@ -761,7 +762,7 @@ static void conn_tcp_server_listen(neu_conn_t *conn)
                       &local.sin6_addr);
 
             fd = socket(AF_INET6, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
-
+            setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &(int) { 1 }, sizeof(int));
             ret = bind(fd, (struct sockaddr *) &local, sizeof(local));
         } else {
             zlog_error(conn->param.log, "invalid ip: %s",