diff --git a/apps/common/utils/encode.py b/apps/common/utils/encode.py
index fc9467cba..d4e9c4cbe 100644
--- a/apps/common/utils/encode.py
+++ b/apps/common/utils/encode.py
@@ -182,3 +182,7 @@ def encrypt_password(password, salt=None):
 def get_signer():
     signer = Signer(settings.SECRET_KEY)
     return signer
+
+
+def ensure_last_char_is_ascii(data):
+    remain = ''
diff --git a/apps/ops/ws.py b/apps/ops/ws.py
index 1d2bea3c5..d6bff86a7 100644
--- a/apps/ops/ws.py
+++ b/apps/ops/ws.py
@@ -3,11 +3,13 @@ import os
 import threading
 import json
 
-from celery.result import AsyncResult
+from common.utils import get_logger
 
 from .celery.utils import get_celery_task_log_path
 from channels.generic.websocket import JsonWebsocketConsumer
 
+logger = get_logger(__name__)
+
 
 class CeleryLogWebsocket(JsonWebsocketConsumer):
     disconnected = False
@@ -22,6 +24,7 @@ class CeleryLogWebsocket(JsonWebsocketConsumer):
             self.handle_task(task_id)
 
     def handle_task(self, task_id):
+        logger.info("Task id: {}".format(task_id))
         log_path = get_celery_task_log_path(task_id)
 
         def func():
@@ -34,19 +37,24 @@ class CeleryLogWebsocket(JsonWebsocketConsumer):
                     continue
                 self.send_json({'message': '\r\n'})
                 try:
-                    task_log_f = open(log_path)
+                    logger.debug('Task log path: {}'.format(log_path))
+                    task_log_f = open(log_path, 'rb')
                     break
                 except OSError:
                     return
 
+            if not task_log_f:
+                return
+
             while not self.disconnected:
                 data = task_log_f.readline()
+
                 if data:
-                    data = data.replace('\n', '\r\n')
-                    self.send_json({'message': data, 'task': task_id})
-                    if data.startswith('Task') and data.find('succeeded'):
+                    data = data.replace(b'\n', b'\r\n')
+                    self.send_json({'message': data.decode(errors='ignore'), 'task': task_id})
+                    if data.startswith(b'Task') and data.find(b'succeeded'):
                         break
-                time.sleep(0.2)
+                time.sleep(0.1)
             task_log_f.close()
         thread = threading.Thread(target=func)
         thread.start()