Better disconnection handling.

sjrpc/core/connectionmanagers.py

@@ -177,7 +177,8 @@ class ConnectionManager(object):
         '''
 
         fd = connection.get_fd()
-        self._poll.modify(fd, ConnectionManager.MASK_WRITABLE)
+        if fd is not None:
+            self._poll.modify(fd, ConnectionManager.MASK_WRITABLE)
         
     def nothing_to_write(self, connection):
         '''
@@ -189,7 +190,8 @@ class ConnectionManager(object):
         '''
 
         fd = connection.get_fd()
-        self._poll.modify(fd, ConnectionManager.MASK_NORMAL)
+        if fd is not None:
+            self._poll.modify(fd, ConnectionManager.MASK_NORMAL)
     
     def handle_event(self, fd, event):
         '''

sjrpc/core/rpcconnection.py

@@ -428,8 +428,10 @@ class RpcConnection(object):
         
         :return: the file descriptor number of the socket
         '''
-        
-        return self._sock.fileno()
+        try:
+            return self._sock.fileno()
+        except socket.error:
+            return None
 
     def getpeername(self):
         '''