Define connect timeout

Rely on connect timeout instead of checking if the server is alive.

autoload/youcompleteme.vim

@@ -740,9 +740,6 @@ function! youcompleteme#Complete( findstart, base )
       return -2
     endif
 
-    if !s:Pyeval( 'ycm_state.IsServerAlive()' )
-      return -2
-    endif
     exec s:python_command "ycm_state.CreateCompletionRequest()"
     return s:Pyeval( 'base.CompletionStartColumn()' )
   else
@@ -753,9 +750,6 @@ endfunction
 
 function! youcompleteme#OmniComplete( findstart, base )
   if a:findstart
-    if !s:Pyeval( 'ycm_state.IsServerAlive()' )
-      return -2
-    endif
     let s:omnifunc_mode = 1
     exec s:python_command "ycm_state.CreateCompletionRequest(" .
           \ "force_semantic = True )"

python/ycm/client/base_request.py

@@ -40,8 +40,9 @@ from ycmd.responses import ServerError, UnknownExtraConf
 
 _HEADERS = {'content-type': 'application/json'}
 _EXECUTOR = UnsafeThreadPoolExecutor( max_workers = 30 )
+_CONNECT_TIMEOUT_SEC = 0.01
 # Setting this to None seems to screw up the Requests/urllib3 libs.
-_DEFAULT_TIMEOUT_SEC = 30
+_READ_TIMEOUT_SEC = 30
 _HMAC_HEADER = 'x-ycm-hmac'
 _logger = logging.getLogger( __name__ )
 
@@ -67,7 +68,7 @@ class BaseRequest( object ):
   # |timeout| is num seconds to tolerate no response from server before giving
   # up; see Requests docs for details (we just pass the param along).
   @staticmethod
-  def GetDataFromHandler( handler, timeout = _DEFAULT_TIMEOUT_SEC ):
+  def GetDataFromHandler( handler, timeout = _READ_TIMEOUT_SEC ):
     return JsonFromFuture( BaseRequest._TalkToHandlerAsync( '',
                                                             handler,
                                                             'GET',
@@ -78,7 +79,7 @@ class BaseRequest( object ):
   # |timeout| is num seconds to tolerate no response from server before giving
   # up; see Requests docs for details (we just pass the param along).
   @staticmethod
-  def PostDataToHandler( data, handler, timeout = _DEFAULT_TIMEOUT_SEC ):
+  def PostDataToHandler( data, handler, timeout = _READ_TIMEOUT_SEC ):
     return JsonFromFuture( BaseRequest.PostDataToHandlerAsync( data,
                                                                handler,
                                                                timeout ) )
@@ -88,7 +89,7 @@ class BaseRequest( object ):
   # |timeout| is num seconds to tolerate no response from server before giving
   # up; see Requests docs for details (we just pass the param along).
   @staticmethod
-  def PostDataToHandlerAsync( data, handler, timeout = _DEFAULT_TIMEOUT_SEC ):
+  def PostDataToHandlerAsync( data, handler, timeout = _READ_TIMEOUT_SEC ):
     return BaseRequest._TalkToHandlerAsync( data, handler, 'POST', timeout )
 
 
@@ -100,7 +101,7 @@ class BaseRequest( object ):
   def _TalkToHandlerAsync( data,
                            handler,
                            method,
-                           timeout = _DEFAULT_TIMEOUT_SEC ):
+                           timeout = _READ_TIMEOUT_SEC ):
     def SendRequest( data, handler, method, timeout ):
       request_uri = _BuildUri( handler )
       if method == 'POST':
@@ -111,12 +112,12 @@ class BaseRequest( object ):
             headers = BaseRequest._ExtraHeaders( method,
                                                  request_uri,
                                                  sent_data ),
-            timeout = timeout )
+            timeout = ( _CONNECT_TIMEOUT_SEC, timeout ) )
       if method == 'GET':
         return BaseRequest.session.get(
             request_uri,
             headers = BaseRequest._ExtraHeaders( method, request_uri ),
-            timeout = timeout )
+            timeout = ( _CONNECT_TIMEOUT_SEC, timeout ) )
 
     @retries( 5, delay = 0.5, backoff = 1.5 )
     def DelayedSendRequest( data, handler, method ):
@@ -222,6 +223,11 @@ def HandleServerException( display = True, truncate = False ):
         _LoadExtraConfFile( e.extra_conf_file )
       else:
         _IgnoreExtraConfFile( e.extra_conf_file )
+  except requests.exceptions.ConnectTimeout:
+    # We don't display this exception to the user since it is likely to happen
+    # for each subsequent request (typically if the server crashed) and we
+    # don't want to spam the user with it.
+    _logger.exception( 'Unable to connect to server' )
   except Exception as e:
     _logger.exception( 'Error while handling server response' )
     if display:

python/ycm/youcompleteme.py

@@ -254,7 +254,6 @@ class YouCompleteMe( object ):
 
 
   def _ShutdownServer( self ):
-    if self.IsServerAlive():
     SendShutdownRequest()
 
 
@@ -298,12 +297,10 @@ class YouCompleteMe( object ):
 
 
   def SendCommandRequest( self, arguments, completer ):
-    if self.IsServerAlive():
     return SendCommandRequest( arguments, completer )
 
 
   def GetDefinedSubcommands( self ):
-    if self.IsServerAlive():
     with HandleServerException():
       return BaseRequest.PostDataToHandler( BuildRequestData(),
                                             'defined_subcommands' )
@@ -324,9 +321,6 @@ class YouCompleteMe( object ):
     except KeyError:
       pass
 
-    if not self.IsServerAlive():
-      return False
-
     exists_completer = SendCompleterAvailableRequest( filetype )
     if exists_completer is None:
       return False
@@ -363,22 +357,16 @@ class YouCompleteMe( object ):
 
 
   def OnBufferUnload( self, deleted_buffer_file ):
-    if not self.IsServerAlive():
-      return
     SendEventNotificationAsync( 'BufferUnload', filepath = deleted_buffer_file )
 
 
   def OnBufferVisit( self ):
-    if not self.IsServerAlive():
-      return
     extra_data = {}
     self._AddUltiSnipsDataIfNeeded( extra_data )
     SendEventNotificationAsync( 'BufferVisit', extra_data = extra_data )
 
 
   def OnInsertLeave( self ):
-    if not self.IsServerAlive():
-      return
     SendEventNotificationAsync( 'InsertLeave' )
 
 
@@ -399,8 +387,6 @@ class YouCompleteMe( object ):
 
 
   def OnCurrentIdentifierFinished( self ):
-    if not self.IsServerAlive():
-      return
     SendEventNotificationAsync( 'CurrentIdentifierFinished' )
 
 
@@ -633,8 +619,6 @@ class YouCompleteMe( object ):
 
 
   def ShowDetailedDiagnostic( self ):
-    if not self.IsServerAlive():
-      return
     with HandleServerException():
       detailed_diagnostic = BaseRequest.PostDataToHandler(
           BuildRequestData(), 'detailed_diagnostic' )
@@ -648,10 +632,7 @@ class YouCompleteMe( object ):
     debug_info = ''
     if self._client_logfile:
       debug_info += 'Client logfile: {0}\n'.format( self._client_logfile )
-    if self.IsServerAlive():
     debug_info += FormatDebugInfoResponse( SendDebugInfoRequest() )
-    else:
-      debug_info += 'Server crashed, no debug info from server\n'
     debug_info += (
       'Server running at: {0}\n'
       'Server process ID: {1}\n'.format( BaseRequest.server_location,
@@ -669,8 +650,8 @@ class YouCompleteMe( object ):
                       self._server_stdout,
                       self._server_stderr ]
 
-    if self.IsServerAlive():
     debug_info = SendDebugInfoRequest()
+    if debug_info:
       completer = debug_info[ 'completer' ]
       if completer:
         for server in completer[ 'servers' ]: