diff --git a/connect.py b/connect.py
index 273edc052..8a4949662 100755
--- a/connect.py
+++ b/connect.py
@@ -188,8 +188,12 @@ def get_user_hostgroup_host(username, gid):
 
 def verify_connect(username, part_ip):
     ip_matched = []
-    hosts_attr = get_user_host(username)
-    hosts = hosts_attr.values()
+    try:
+        hosts_attr = get_user_host(username)
+        hosts = hosts_attr.values()
+    except ServerError, e:
+        color_print(e, 'red')
+        return False
     for ip_info in hosts:
         for info in ip_info[1:]:
             if part_ip in info:
@@ -217,7 +221,11 @@ def print_prompt():
 
 
 def print_user_host(username):
-    hosts_attr = get_user_host(username)
+    try:
+        hosts_attr = get_user_host(username)
+    except ServerError, e:
+        color_print(e, 'red')
+        return
     hosts = hosts_attr.keys()
     hosts.sort()
     for ip in hosts:
@@ -267,7 +275,6 @@ def connect(username, password, host, port, login_name):
     global channel
     win_size = get_win_size()
     channel = ssh.invoke_shell(height=win_size[0], width=win_size[1])
-    #channel.resize_pty(height=win_size[0], width=win_size[1])
     try:
         signal.signal(signal.SIGWINCH, set_win_size)
     except:
diff --git a/jumpserver/api.py b/jumpserver/api.py
index f7846f956..7c416925a 100644
--- a/jumpserver/api.py
+++ b/jumpserver/api.py
@@ -349,14 +349,18 @@ def get_user_host(username):
     """Get the hosts of under the user control."""
     hosts_attr = {}
     asset_all = user_perm_asset_api(username)
-    user = User.objects.get(username=username)
-    for asset in asset_all:
-        alias = AssetAlias.objects.filter(user=user, host=asset)
-        if alias and alias[0].alias != '':
-            hosts_attr[asset.ip] = [asset.id, asset.ip, alias[0].alias]
-        else:
-            hosts_attr[asset.ip] = [asset.id, asset.ip, asset.comment]
-    return hosts_attr
+    user = User.objects.filter(username=username)
+    if user:
+        user = user[0]
+        for asset in asset_all:
+            alias = AssetAlias.objects.filter(user=user, host=asset)
+            if alias and alias[0].alias != '':
+                hosts_attr[asset.ip] = [asset.id, asset.ip, alias[0].alias]
+            else:
+                hosts_attr[asset.ip] = [asset.id, asset.ip, asset.comment]
+        return hosts_attr
+    else:
+        raise ServerError('User %s does not exit!' % username)
 
 
 def get_connect_item(username, ip):