[2017/03/25 14:43:34.198] ======================================================================
 [2017/03/25 14:43:34.198] ERROR: test_gridfs_replica_set (test_gridfs.TestGridfsReplicaSet)
 [2017/03/25 14:43:34.199] ----------------------------------------------------------------------
 [2017/03/25 14:43:34.199] Traceback (most recent call last):
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/test/test_gridfs.py", line 477, in test_gridfs_replica_set
 [2017/03/25 14:43:34.199]     oid = fs.put(b'foo')
 [2017/03/25 14:43:34.199]   File "gridfs/__init__.py", line 124, in put
 [2017/03/25 14:43:34.199]     grid_file.close()
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 295, in close
 [2017/03/25 14:43:34.199]     self.__flush()
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 274, in __flush
 [2017/03/25 14:43:34.199]     self.__flush_buffer()
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 266, in __flush_buffer
 [2017/03/25 14:43:34.199]     self.__flush_data(self._buffer.getvalue())
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 245, in __flush_data
 [2017/03/25 14:43:34.199]     self.__ensure_indexes()
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 187, in __ensure_indexes
 [2017/03/25 14:43:34.199]     self.__create_index(self._coll.files, _F_INDEX, False)
 [2017/03/25 14:43:34.199]   File "gridfs/grid_file.py", line 176, in __create_index
 [2017/03/25 14:43:34.199]     doc = collection.find_one(projection={"_id": 1})
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/pymongo/collection.py", line 1102, in find_one
 [2017/03/25 14:43:34.199]     for result in cursor.limit(-1):
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/pymongo/cursor.py", line 1114, in next
 [2017/03/25 14:43:34.199]     if len(self.__data) or self._refresh():
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/pymongo/cursor.py", line 1036, in _refresh
 [2017/03/25 14:43:34.199]     self.__collation))
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/pymongo/cursor.py", line 928, in __send_message
 [2017/03/25 14:43:34.199]     helpers._check_command_response(doc['data'][0])
 [2017/03/25 14:43:34.199]   File "/data/mci/b2890471f44659b881e073fb4b39bec9/src/pymongo/helpers.py", line 210, in _check_command_response
 [2017/03/25 14:43:34.199]     raise OperationFailure(msg % errmsg, code, response)
 [2017/03/25 14:43:34.199] OperationFailure: Executor error during find command: OperationFailed: Operation aborted because: all indexes on collection dropped