diff --git a/apps/assets/models/node.py b/apps/assets/models/node.py
index 449c8e310..467feb6f9 100644
--- a/apps/assets/models/node.py
+++ b/apps/assets/models/node.py
@@ -29,6 +29,7 @@ class Node(OrgModelMixin):
 
     class Meta:
         verbose_name = _("Node")
+        ordering = ['key']
 
     def __str__(self):
         return self.full_value
diff --git a/apps/assets/signals.py b/apps/assets/signals.py
deleted file mode 100644
index 20da657b1..000000000
--- a/apps/assets/signals.py
+++ /dev/null
@@ -1,5 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-from django.dispatch import Signal
-
-on_app_ready = Signal()
diff --git a/apps/assets/templates/assets/user_asset_list.html b/apps/assets/templates/assets/user_asset_list.html
index 0e39aa899..633906474 100644
--- a/apps/assets/templates/assets/user_asset_list.html
+++ b/apps/assets/templates/assets/user_asset_list.html
@@ -17,7 +17,6 @@
                    <div class="file-manager ">
                        <div id="assetTree" class="ztree">
                        </div>
-
                        <div class="clearfix"></div>
                    </div>
                </div>
@@ -62,16 +61,19 @@
 
 {% block custom_foot_js %}
 <script>
+var treeUrl = "{% url 'api-perms:my-nodes-assets-as-tree' %}?show_assets=0&cache_policy=1";
 var zTree, asset_table, show=0;
 var inited = false;
 var url;
+
+
 function initTable() {
     if (inited){
         return
     } else {
         inited = true;
     }
-    url = "{% url 'api-perms:my-assets' %}";
+    url = "{% url 'api-perms:my-assets' %}?cache_policy=1";
     var options = {
         ele: $('#user_assets_table'),
         columnDefs: [
@@ -106,7 +108,7 @@ function initTable() {
 }
 
 function onSelected(event, treeNode) {
-    url = '{% url "api-perms:my-node-assets" node_id=DEFAULT_PK %}';
+    url = '{% url "api-perms:my-node-assets" node_id=DEFAULT_PK %}?cache_policy=1';
     var node_id = treeNode.meta.node.id;
     url = url.replace("{{ DEFAULT_PK }}", node_id);
     setCookie('node_selected', treeNode.id);
@@ -118,7 +120,7 @@ function initTree() {
     var setting = {
         view: {
             dblClickExpand: false,
-            showLine: true
+            showLine: true,
         },
         data: {
             simpleData: {
@@ -131,10 +133,14 @@ function initTree() {
     };
 
     var zNodes = [];
-    $.get("{% url 'api-perms:my-nodes-assets-as-tree' %}?show_assets=0", function(data, status){
+    $.get(treeUrl, function(data, status){
         zNodes = data;
         $.fn.zTree.init($("#assetTree"), setting, zNodes);
         zTree = $.fn.zTree.getZTreeObj("assetTree");
+        rootNodeAddDom(zTree, function () {
+            treeUrl = treeUrl.replace('cache_policy=1', 'cache_policy=2');
+            initTree();
+        });
     });
 }
 
diff --git a/apps/jumpserver/error_views.py b/apps/jumpserver/error_views.py
new file mode 100644
index 000000000..0d154d52b
--- /dev/null
+++ b/apps/jumpserver/error_views.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+#
+from django.shortcuts import render
+from django.http import JsonResponse
+
+
+def handler404(request, *args, **argv):
+    if request.content_type.find('application/json') > -1:
+        response = JsonResponse({'error': 'Not found'}, status=404)
+    else:
+        response = render(request, '404.html', status=404)
+    return response
+
+
+def handler500(request, *args, **argv):
+    if request.content_type.find('application/json') > -1:
+        response = JsonResponse({'error': 'Server internal error'}, status=500)
+    else:
+        response = render(request, '500.html', status=500)
+    return response
diff --git a/apps/jumpserver/urls.py b/apps/jumpserver/urls.py
index 8cc9c6eb4..88e5ba58c 100644
--- a/apps/jumpserver/urls.py
+++ b/apps/jumpserver/urls.py
@@ -21,7 +21,7 @@ api_v1_patterns = [
         path('audits/v1/', include('audits.urls.api_urls', namespace='api-audits')),
         path('orgs/v1/', include('orgs.urls.api_urls', namespace='api-orgs')),
         path('settings/v1/', include('settings.urls.api_urls', namespace='api-settings')),
-       path('authentication/v1/', include('authentication.urls.api_urls', namespace='api-auth')),
+        path('authentication/v1/', include('authentication.urls.api_urls', namespace='api-auth')),
    ]))
 ]
 
@@ -68,6 +68,9 @@ urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) \
             + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
 urlpatterns += js_i18n_patterns
 
+handler404 = 'jumpserver.error_views.handler404'
+handler500 = 'jumpserver.error_views.handler500'
+
 if settings.DEBUG:
     urlpatterns += [
         re_path('^swagger(?P<format>\.json|\.yaml)$',
diff --git a/apps/ops/templates/ops/command_execution_create.html b/apps/ops/templates/ops/command_execution_create.html
index bffdfdaef..378acba9d 100644
--- a/apps/ops/templates/ops/command_execution_create.html
+++ b/apps/ops/templates/ops/command_execution_create.html
@@ -110,9 +110,9 @@ function initTree() {
             onCheck: onCheck
         }
     };
-    var url = "{% url 'api-perms:my-nodes-assets-as-tree' %}";
+    var url = "{% url 'api-perms:my-nodes-assets-as-tree' %}?cache_policy=1";
     if (systemUserId) {
-        url += '?system_user=' + systemUserId
+        url += '&system_user=' + systemUserId
     }
 
     $.get(url, function(data, status){
diff --git a/apps/perms/api/user_permission.py b/apps/perms/api/user_permission.py
index f00fa8e2e..0fc35e9ef 100644
--- a/apps/perms/api/user_permission.py
+++ b/apps/perms/api/user_permission.py
@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 #
 
+from hashlib import md5
+from django.core.cache import cache
+from django.conf import settings
 from django.shortcuts import get_object_or_404
 from rest_framework.views import APIView, Response
 from rest_framework.generics import (
@@ -10,6 +13,7 @@ from rest_framework.pagination import LimitOffsetPagination
 
 from common.permissions import IsValidUser, IsOrgAdminOrAppUser
 from common.tree import TreeNodeSerializer
+from common.utils import get_logger
 from orgs.utils import set_to_root_org
 from ..utils import (
     AssetPermissionUtil, parse_asset_to_tree_node, parse_node_to_tree_node
@@ -21,6 +25,7 @@ from ..hands import (
 from .. import serializers
 from ..mixins import AssetsFilterMixin
 
+logger = get_logger(__name__)
 
 __all__ = [
     'UserGrantedAssetsApi', 'UserGrantedNodesApi',
@@ -32,18 +37,61 @@ __all__ = [
 
 class UserPermissionMixin:
     cache_policy = '0'
+    RESP_CACHE_KEY = '_PERMISSION_RESPONSE_CACHE_{}'
+    CACHE_TIME = settings.ASSETS_PERM_CACHE_TIME
 
     @staticmethod
     def change_org_if_need(request, kwargs):
-        if request.user.is_superuser or \
+        if request.user.is_authenticated and \
+                request.user.is_superuser or \
                 request.user.is_app or \
                 kwargs.get('pk') is None:
             set_to_root_org()
 
-    def dispatch(self, request, *args, **kwargs):
+    def get_response_from_cache(self, request):
+        if self.cache_policy in ['1', 'using']:
+            path_md5 = md5(request.get_full_path().encode()).hexdigest()
+            obj = self.get_object()
+            util = AssetPermissionUtil(obj, cache_policy=self.cache_policy)
+            cache_id = '{}_{}'.format(path_md5, util.cache_meta.get('id'))
+            response = self.get_cache_response(cache_id)
+            return response
+        return None
+
+    def get(self, request, *args, **kwargs):
         self.change_org_if_need(request, kwargs)
         self.cache_policy = request.GET.get('cache_policy', '0')
-        return super().dispatch(request, *args, **kwargs)
+        path_md5 = md5(request.get_full_path().encode()).hexdigest()
+        path_cache_key = '{}_{}'.format(path_md5, '*')
+        if self.cache_policy in AssetPermissionUtil.CACHE_POLICY_MAP[0]:
+            return super().get(request, *args, **kwargs)
+        elif self.cache_policy in AssetPermissionUtil.CACHE_POLICY_MAP[2]:
+            self.expire_cache_response(path_cache_key)
+        obj = self.get_object()
+        util = AssetPermissionUtil(obj, cache_policy=self.cache_policy)
+        cache_id = '{}_{}'.format(path_md5, util.cache_meta.get('id'))
+        response = self.get_cache_response(cache_id)
+        if not response:
+            response = super().get(request, *args, **kwargs)
+            self.set_cache_response(cache_id, response)
+        return response
+
+    def get_cache_response(self, _id):
+        if not _id:
+            return None
+        key = self.RESP_CACHE_KEY.format(_id)
+        data = cache.get(key)
+        if not data:
+            return None
+        return Response(data)
+
+    def expire_cache_response(self, _id):
+        key = self.RESP_CACHE_KEY.format(_id)
+        cache.delete(key)
+
+    def set_cache_response(self, _id, response):
+        key = self.RESP_CACHE_KEY.format(_id)
+        cache.set(key, response.data, self.CACHE_TIME)
 
 
 class UserGrantedAssetsApi(UserPermissionMixin, AssetsFilterMixin, ListAPIView):
@@ -54,15 +102,18 @@ class UserGrantedAssetsApi(UserPermissionMixin, AssetsFilterMixin, ListAPIView):
     serializer_class = AssetGrantedSerializer
     pagination_class = LimitOffsetPagination
 
-    def get_queryset(self):
+    def get_object(self):
         user_id = self.kwargs.get('pk', '')
-        queryset = []
 
         if user_id:
             user = get_object_or_404(User, id=user_id)
         else:
             user = self.request.user
+        return user
 
+    def get_queryset(self):
+        queryset = []
+        user = self.get_object()
         util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         assets = util.get_assets()
         for k, v in assets.items():
@@ -84,12 +135,16 @@ class UserGrantedNodesApi(UserPermissionMixin, ListAPIView):
     permission_classes = (IsOrgAdminOrAppUser,)
     serializer_class = NodeSerializer
 
-    def get_queryset(self):
+    def get_object(self):
         user_id = self.kwargs.get('pk', '')
         if user_id:
             user = get_object_or_404(User, id=user_id)
         else:
             user = self.request.user
+        return user
+
+    def get_queryset(self):
+        user = self.get_object()
         util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         nodes = util.get_nodes_with_assets()
         return nodes.keys()
@@ -107,14 +162,17 @@ class UserGrantedNodesWithAssetsApi(UserPermissionMixin, AssetsFilterMixin, List
     permission_classes = (IsOrgAdminOrAppUser,)
     serializer_class = serializers.NodeGrantedSerializer
 
-    def get_queryset(self):
+    def get_object(self):
         user_id = self.kwargs.get('pk', '')
-        queryset = []
         if not user_id:
             user = self.request.user
         else:
             user = get_object_or_404(User, id=user_id)
+        return user
 
+    def get_queryset(self):
+        queryset = []
+        user = self.get_object()
         util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         nodes = util.get_nodes_with_assets()
         for node, _assets in nodes.items():
@@ -154,17 +212,22 @@ class UserGrantedNodesWithAssetsAsTreeApi(UserPermissionMixin, ListAPIView):
             self.permission_classes = (IsValidUser,)
         return super().get_permissions()
 
-    def get_queryset(self):
+    def get_object(self):
         user_id = self.kwargs.get('pk', '')
-        queryset = []
         if not user_id:
             user = self.request.user
         else:
             user = get_object_or_404(User, id=user_id)
+        return user
+
+    def get_queryset(self):
+        queryset = []
+        user = self.get_object()
         util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         if self.system_user_id:
             util.filter_permission_with_system_user(
-                system_user=self.system_user_id)
+                system_user=self.system_user_id
+            )
         nodes = util.get_nodes_with_assets()
         for node, assets in nodes.items():
             data = parse_node_to_tree_node(node)
@@ -186,14 +249,18 @@ class UserGrantedNodeAssetsApi(UserPermissionMixin, AssetsFilterMixin, ListAPIVi
     serializer_class = AssetGrantedSerializer
     pagination_class = LimitOffsetPagination
 
-    def get_queryset(self):
+    def get_object(self):
         user_id = self.kwargs.get('pk', '')
-        node_id = self.kwargs.get('node_id')
 
         if user_id:
             user = get_object_or_404(User, id=user_id)
         else:
             user = self.request.user
+        return user
+
+    def get_queryset(self):
+        user = self.get_object()
+        node_id = self.kwargs.get('node_id')
         util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         node = get_object_or_404(Node, id=node_id)
         nodes = util.get_nodes_with_assets()
@@ -217,8 +284,12 @@ class UserGrantedNodeChildrenApi(UserPermissionMixin, ListAPIView):
     permission_classes = (IsValidUser,)
     serializer_class = serializers.AssetPermissionNodeSerializer
 
+    def get_object(self):
+        return self.request.user
+
     def get_children_queryset(self):
-        util = AssetPermissionUtil(self.request.user, cache_policy=self.cache_policy)
+        user = self.get_object()
+        util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         node_id = self.request.query_params.get('id')
         nodes_granted = util.get_nodes_with_assets()
         if not nodes_granted:
@@ -258,7 +329,8 @@ class UserGrantedNodeChildrenApi(UserPermissionMixin, ListAPIView):
         return queryset
 
     def get_search_queryset(self, keyword):
-        util = AssetPermissionUtil(self.request.user, cache_policy=self.cache_policy)
+        user = self.get_object()
+        util = AssetPermissionUtil(user, cache_policy=self.cache_policy)
         nodes_granted = util.get_nodes_with_assets()
         queryset = []
         for node, assets in nodes_granted.items():
@@ -294,7 +366,7 @@ class UserGrantedNodeChildrenApi(UserPermissionMixin, ListAPIView):
 class ValidateUserAssetPermissionApi(UserPermissionMixin, APIView):
     permission_classes = (IsOrgAdminOrAppUser,)
 
-    def get(self, request):
+    def get(self, request, *args, **kwargs):
         user_id = request.query_params.get('user_id', '')
         asset_id = request.query_params.get('asset_id', '')
         system_id = request.query_params.get('system_user_id', '')
diff --git a/apps/perms/signals_handler.py b/apps/perms/signals_handler.py
index e6127f836..4521fef3c 100644
--- a/apps/perms/signals_handler.py
+++ b/apps/perms/signals_handler.py
@@ -1,15 +1,26 @@
 # -*- coding: utf-8 -*-
 #
-from django.db.models.signals import m2m_changed
+from django.db.models.signals import m2m_changed, post_save, post_delete
 from django.dispatch import receiver
 
 from common.utils import get_logger
+from .utils import AssetPermissionUtil
 from .models import AssetPermission
 
 
 logger = get_logger(__file__)
 
 
+@receiver(post_save)
+def on_permission_update(sender, **kwargs):
+    AssetPermissionUtil.expire_all_cache()
+
+
+@receiver(post_delete)
+def on_permission_delete(sender, **kwargs):
+    AssetPermissionUtil.expire_all_cache()
+
+
 @receiver(m2m_changed, sender=AssetPermission.nodes.through)
 def on_permission_nodes_changed(sender, instance=None, **kwargs):
     if isinstance(instance, AssetPermission) and kwargs['action'] == 'post_add':
diff --git a/apps/perms/utils.py b/apps/perms/utils.py
index 34330836b..d80f272f2 100644
--- a/apps/perms/utils.py
+++ b/apps/perms/utils.py
@@ -1,7 +1,9 @@
 # coding: utf-8
 
 from __future__ import absolute_import, unicode_literals
+import uuid
 from collections import defaultdict
+from django.utils import timezone
 from django.db.models import Q
 from django.core.cache import cache
 from django.conf import settings
@@ -100,14 +102,19 @@ class AssetPermissionUtil:
     }
 
     CACHE_KEY = '_ASSET_PERM_CACHE_{}_{}'
+    CACHE_META_KEY = '_ASSET_PERM_META_KEY_{}'
     CACHE_TIME = settings.ASSETS_PERM_CACHE_TIME
     CACHE_POLICY_MAP = (('0', 'never'), ('1', 'using'), ('2', 'refresh'))
 
     def __init__(self, obj, cache_policy='0'):
         self.object = obj
+        self.obj_id = str(obj.id)
         self._permissions = None
         self._assets = None
         self.cache_policy = cache_policy
+        self.node_key = self.CACHE_KEY.format(self.obj_id, 'NODES_WITH_ASSETS')
+        self.asset_key = self.CACHE_KEY.format(self.obj_id, 'ASSETS')
+        self.system_key = self.CACHE_KEY.format(self.obj_id, 'SYSTEM_USER')
 
     @property
     def permissions(self):
@@ -163,14 +170,11 @@ class AssetPermissionUtil:
         return self._assets
 
     def get_assets_from_cache(self):
-        cache_key = self.CACHE_KEY.format(str(self.object.id), 'ASSETS')
-        cached = cache.get(cache_key)
-        if cached:
-            return cached
-        assets = self.get_assets_without_cache()
-        self.expire_cache()
-        cache.set(cache_key, assets, self.CACHE_TIME)
-        return assets
+        cached = cache.get(self.asset_key)
+        if not cached:
+            self.update_cache()
+            cached = cache.get(self.asset_key)
+        return cached
 
     def get_assets(self):
         if self.cache_policy in self.CACHE_POLICY_MAP[1]:
@@ -179,6 +183,7 @@ class AssetPermissionUtil:
             self.expire_cache()
             return self.get_assets_from_cache()
         else:
+            self.expire_cache()
             return self.get_assets_without_cache()
 
     def get_nodes_with_assets_without_cache(self):
@@ -187,21 +192,18 @@ class AssetPermissionUtil:
         {"node": {"assets": set("system_user")}}
         :return:
         """
-        assets = self.get_assets()
+        assets = self.get_assets_without_cache()
         tree = GenerateTree()
         for asset, system_users in assets.items():
             tree.add_asset(asset, system_users)
         return tree.get_nodes()
 
     def get_nodes_with_assets_from_cache(self):
-        cache_key = self.CACHE_KEY.format(str(self.object.id), 'NODES_WITH_ASSETS')
-        cached = cache.get(cache_key)
-        if cached:
-            return cached
-        nodes = self.get_nodes_with_assets_without_cache()
-        self.expire_cache()
-        cache.set(cache_key, nodes, self.CACHE_TIME)
-        return nodes
+        cached = cache.get(self.node_key)
+        if not cached:
+            self.update_cache()
+            cached = cache.get(self.node_key)
+        return cached
 
     def get_nodes_with_assets(self):
         if self.cache_policy in self.CACHE_POLICY_MAP[1]:
@@ -220,14 +222,11 @@ class AssetPermissionUtil:
         return system_users
 
     def get_system_user_from_cache(self):
-        cache_key = self.CACHE_KEY.format(str(self.object.id), 'SYSTEM_USER')
-        cached = cache.get(cache_key)
-        if cached:
-            return cached
-        self.expire_cache()
-        system_users = self.get_system_user_without_cache()
-        cache.set(cache_key, system_users, self.CACHE_TIME)
-        return system_users
+        cached = cache.get(self.system_key)
+        if not cached:
+            self.update_cache()
+            cached = cache.get(self.system_key)
+        return cached
 
     def get_system_users(self):
         if self.cache_policy in self.CACHE_POLICY_MAP[1]:
@@ -238,14 +237,51 @@ class AssetPermissionUtil:
         else:
             return self.get_system_user_without_cache()
 
+    @property
+    def cache_meta(self):
+        key = self.CACHE_META_KEY.format(str(self.object.id))
+        return cache.get(key) or {}
+
+    def set_cache_meta(self):
+        key = self.CACHE_META_KEY.format(str(self.object.id))
+        meta = {
+            'id': str(uuid.uuid4()),
+            'datetime': timezone.now(),
+            'object': str(self.object)
+        }
+        cache.set(key, meta, self.CACHE_TIME)
+
+    def expire_cache_meta(self):
+        key = self.CACHE_META_KEY.format(str(self.object.id))
+        cache.delete(key)
+
+    def update_cache(self):
+        assets = self.get_assets_without_cache()
+        nodes = self.get_nodes_with_assets_without_cache()
+        system_users = self.get_system_user_without_cache()
+        cache.set(self.asset_key, assets, self.CACHE_TIME)
+        cache.set(self.node_key, nodes, self.CACHE_TIME)
+        cache.set(self.system_key, system_users, self.CACHE_TIME)
+        self.set_cache_meta()
+
     def expire_cache(self):
-        cache_key = self.CACHE_KEY.format(str(self.object.id), '*')
-        cache.delete_pattern(cache_key)
+        """
+        因为 获取用户的节点，资产，系统用户等都能会缓存，这里会清理所有与该对象有关的
+        缓存，以免造成不统一的情况
+        :return:
+        """
+        key = self.CACHE_KEY.format(str(self.object.id), '*')
+        cache.delete_pattern(key)
+        self.expire_cache_meta()
+
+    def expire_all_cache_meta(self):
+        key = self.CACHE_META_KEY.format('*')
+        cache.delete_pattern(key)
 
     @classmethod
     def expire_all_cache(cls):
-        cache_key = cls.CACHE_KEY.format('*', '*')
-        cache.delete_pattern(cache_key)
+        key = cls.CACHE_KEY.format('*', '*')
+        cache.delete_pattern(key)
 
 
 def is_obj_attr_has(obj, val, attrs=("hostname", "ip", "comment")):
diff --git a/apps/settings/forms.py b/apps/settings/forms.py
index 6721d07d1..d87845ea9 100644
--- a/apps/settings/forms.py
+++ b/apps/settings/forms.py
@@ -105,7 +105,8 @@ class LDAPSettingForm(BaseForm):
     )
     AUTH_LDAP_SEARCH_OU = forms.CharField(
         label=_("User OU"),
-        help_text=_("Use | split User OUs")
+        help_text=_("Use | split User OUs"),
+        required=False,
     )
     AUTH_LDAP_SEARCH_FILTER = forms.CharField(
         label=_("User search filter"),
diff --git a/apps/static/css/jumpserver.css b/apps/static/css/jumpserver.css
index 3945258b0..c3dcfb386 100644
--- a/apps/static/css/jumpserver.css
+++ b/apps/static/css/jumpserver.css
@@ -450,3 +450,7 @@ div.dataTables_wrapper div.dataTables_filter {
     content:"*";
     color:red;
 }
+
+#tree-refresh .fa-refresh {
+    font: normal normal normal 14px/1 FontAwesome !important;
+}
\ No newline at end of file
diff --git a/apps/static/js/jumpserver.js b/apps/static/js/jumpserver.js
index 5e602dd4f..85ae506d1 100644
--- a/apps/static/js/jumpserver.js
+++ b/apps/static/js/jumpserver.js
@@ -922,3 +922,16 @@ function initSelectedAssets2Table(){
         });
     }
 }
+
+
+function rootNodeAddDom(ztree, callback) {
+    var refreshIcon = "<a id='tree-refresh'><i class='fa fa-refresh'></i></a>";
+    var rootNode = ztree.getNodes()[0];
+    var $rootNodeRef = $("#" + rootNode.tId + "_a");
+    $rootNodeRef.after(refreshIcon);
+    var refreshIconRef = $('#tree-refresh');
+    refreshIconRef.bind('click', function () {
+        ztree.destroy();
+        callback()
+    })
+}
\ No newline at end of file
diff --git a/apps/templates/404.html b/apps/templates/404.html
new file mode 100644
index 000000000..3d2e1a1f8
--- /dev/null
+++ b/apps/templates/404.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Not found</title>
+</head>
+<body>
+<h1>Not found</h1>
+</body>
+</html>
\ No newline at end of file
diff --git a/apps/templates/500.html b/apps/templates/500.html
new file mode 100644
index 000000000..d0aa990d7
--- /dev/null
+++ b/apps/templates/500.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Server error</title>
+</head>
+<body>
+<h1>Server error occur, contact administrator</h1>
+</body>
+</html>
\ No newline at end of file
diff --git a/apps/users/models/user.py b/apps/users/models/user.py
index 1e84c98e0..86751e359 100644
--- a/apps/users/models/user.py
+++ b/apps/users/models/user.py
@@ -286,20 +286,21 @@ class User(AbstractUser):
 
     @property
     def private_token(self):
-        return self.create_private_token()
-
-    def create_private_token(self):
-        from .authentication import PrivateToken
+        from authentication.models import PrivateToken
         try:
             token = PrivateToken.objects.get(user=self)
         except PrivateToken.DoesNotExist:
-            token = PrivateToken.objects.create(user=self)
-        return token.key
+            token = self.create_private_token()
+        return token
+
+    def create_private_token(self):
+        from authentication.models import PrivateToken
+        token = PrivateToken.objects.create(user=self)
+        return token
 
     def refresh_private_token(self):
-        from .authentication import PrivateToken
-        PrivateToken.objects.filter(user=self).delete()
-        return PrivateToken.objects.create(user=self)
+        self.private_token.delete()
+        return self.create_private_token()
 
     def create_bearer_token(self, request=None):
         expiration = settings.TOKEN_EXPIRATION or 3600
diff --git a/apps/users/templates/users/user_granted_asset.html b/apps/users/templates/users/user_granted_asset.html
index aac788e40..6c0534937 100644
--- a/apps/users/templates/users/user_granted_asset.html
+++ b/apps/users/templates/users/user_granted_asset.html
@@ -64,6 +64,7 @@ var zTree;
 var inited = false;
 var url;
 var asset_table;
+var treeUrl = "{% url 'api-perms:user-nodes-assets-as-tree' pk=object.id %}?show_assets=0&cache_policy=1";
 
 function initTable() {
     if (inited){
@@ -71,7 +72,7 @@ function initTable() {
     } else {
         inited = true;
     }
-    url = "{% url 'api-perms:user-assets' pk=object.id %}";
+    url = "{% url 'api-perms:user-assets' pk=object.id %}?cache_policy=1";
     var options = {
         ele: $('#user_assets_table'),
         columnDefs: [
@@ -106,13 +107,14 @@ function initTable() {
 }
 
 function onSelected(event, treeNode) {
-    url = '{% url "api-perms:user-node-assets" pk=object.id node_id=DEFAULT_PK %}';
+    url = '{% url "api-perms:user-node-assets" pk=object.id node_id=DEFAULT_PK %}?cache_policy=1';
     var node_id = treeNode.meta.node.id;
     url = url.replace("{{ DEFAULT_PK }}", node_id);
     asset_table.ajax.url(url);
     asset_table.ajax.reload();
 }
 
+
 function initTree() {
     var setting = {
         view: {
@@ -129,9 +131,13 @@ function initTree() {
         }
     };
 
-    $.get("{% url 'api-perms:user-nodes-assets-as-tree' pk=object.id %}?show_assets=0", function(data, status) {
+    $.get(treeUrl, function(data, status) {
         $.fn.zTree.init($("#assetTree"), setting, data);
         zTree = $.fn.zTree.getZTreeObj("assetTree");
+        rootNodeAddDom(zTree, function () {
+            treeUrl = treeUrl.replace('cache_policy=1', 'cache_policy=2');
+            initTree();
+        });
     });
 }