YouCompleteMe Error: Tern server is not ruing(crashed)

I updated YCM few days ago then I found js completion is missing.

I've recompiled it by ./install.py --te-completer, and YcmDebugInfo command shows Te server is not ruing(crashed).

This is some error log:

2016-05-06 00:18:31,216 - INFO - Received health request
2016-05-06 00:18:31,224 - INFO - Received debug info request
2016-05-06 00:19:23,704 - INFO - Received event notification
2016-05-06 00:19:23,717 - INFO - Received event notification
2016-05-06 00:19:23,718 - INFO - Adding buffer identifiers for file: /home/jian/0x00/kanban-app/webpack.config.js
2016-05-06 00:19:23,724 - INFO - Received event notification
2016-05-06 00:19:23,732 - INFO - Received event notification
2016-05-06 00:19:23,742 - INFO - Received event notification
2016-05-06 00:19:23,743 - INFO - Adding buffer identifiers for file: /home/jian/0x00/kanban-app/webpack.config.js
2016-05-06 00:19:23,791 - INFO - Using node binary from: /usr/bin/node
2016-05-06 00:19:23,791 - INFO - Starting Te.js server...
2016-05-06 00:19:23,795 - INFO - Te.js Server started with pid: 18781 listening on port 54985
2016-05-06 00:19:23,795 - INFO - Te.js Server log files are: /tmp/ycm_temp/te_54985_stdout.log and /tmp/ycm_temp/te_54985_stderr.log
2016-05-06 00:19:23,796 - INFO - Detected .te-project file at: /home/jian/.te-config
2016-05-06 00:19:23,803 - INFO - Starting new HTTP coection (1): 127.0.0.1
2016-05-06 00:19:23,810 - INFO - Starting new HTTP coection (1): 127.0.0.1
2016-05-06 00:19:29,631 - INFO - Received debug info request
2016-05-06 00:19:50,054 - INFO - Received filetype completion available request
2016-05-06 00:20:08,442 - INFO - Received debug info request
2016-05-06 00:20:40,026 - INFO - Received completion request
2016-05-06 00:20:40,113 - INFO - Received completion request
2016-05-06 00:20:40,335 - INFO - Received completion request
2016-05-06 00:20:40,416 - INFO - Received completion request
2016-05-06 00:20:41,045 - INFO - Received event notification
2016-05-06 00:20:41,046 - INFO - Adding ONE buffer identifier for file: /home/jian/0x00/kanban-app/webpack.config.js
2016-05-06 00:20:41,055 - INFO - Received completion request
2016-05-06 00:20:41,057 - ERROR - Exception from semantic completer (using general): Traceback (most recent call last):
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/handlers.py", line 99, in GetCompletions
    .ComputeCandidates( request_data ) )
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/completers/completer.py", line 218, in ComputeCandidates
    candidates = self._GetCandidatesFromSubclass( request_data )
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/completers/completer.py", line 234, in _GetCandidatesFromSubclass
    raw_completions = self.ComputeCandidatesIer( request_data )
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/completers/javascript/te_completer.py", line 181, in ComputeCandidatesIer
    request_data ).get( 'completions', [] )
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/completers/javascript/te_completer.py", line 357, in _GetResponse
    retu self._PostRequest( { 'query': full_query }, request_data )
  File "/home/jian/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/../ycmd/completers/javascript/te_completer.py", line 303, in _PostRequest
    raise ValueError( 'Not coected to server' )
ValueError: Not coected to server

2016-05-06 00:20:41,933 - INFO - Received event notification
2016-05-06 00:20:41,933 - INFO - Adding buffer identifiers for file: /home/jian/0x00/kanban-app/webpack.config.js
2016-05-06 00:20:41,940 - INFO - Received event notification
2016-05-06 00:20:42,258 - INFO - Received event notification
2016-05-06 00:20:42,258 - INFO - Adding buffer identifiers for file: /home/jian/0x00/kanban-app/webpack.config.js
2016-05-06 00:20:55,703 - INFO - Received debug info request

If you want more informations, OS: Arch Linux, Vim version:7.4, Node version: v6.0.0.

Any idea?