message: (u'Cannot perform write: lost contact with primary replica',)

traceback:

File "/usr/local/lib/python2.7/dist-packages/mcm_loader/loader_util.py", line 157, in rethinkdb_sink
status = task_insert_logic(task)
File "/home/mcm/Mega/Morningstar/util.py", line 135, in drain_method
return r.table(table).insert(docs, durability=config['durability'], conflict='update').run()
File "/home/mcm/.local/lib/python2.7/site-packages/rethinkdb/ast.py", line 118, in run
return c._start(self, **global_optargs)
File "/home/mcm/.local/lib/python2.7/site-packages/rethinkdb/net.py", line 595, in _start
return self._instance.run_query(q, global_optargs.get('noreply', False))
File "/home/mcm/.local/lib/python2.7/site-packages/rethinkdb/net.py", line 457, in run_query
raise res.make_error(query)