关于scrapy mongodb pymongo.errors.AutoReconnect: connection closed

Traceback (most recent call last):
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapyutilsdefer.py", line 161, in maybeDeferred_coro
    result = f(*args, **kw)
  File "C:Usersli.pinlianganaconda3libsite-packagespydispatchrobustapply.py", line 55, in robustApply
    return receiver(*arguments, **named)
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapyextensionscorestats.py", line 31, in spider_closed
    elapsed_time = finish_time - self.start_time
TypeError: unsupported operand type(s) for -: 'datetime.datetime' and 'NoneType'
2021-10-15 14:19:58 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'log_count/ERROR': 2, 'log_count/INFO': 9}
2021-10-15 14:19:58 [scrapy.core.engine] INFO: Spider closed (shutdown)
Unhandled error in Deferred:
2021-10-15 14:19:59 [twisted] CRITICAL: Unhandled error in Deferred:

Traceback (most recent call last):
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapycrawler.py", line 177, in crawl
    return self._crawl(crawler, *args, **kwargs)
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapycrawler.py", line 181, in _crawl
    d = crawler.crawl(*args, **kwargs)
  File "C:Usersli.pinlianganaconda3libsite-packagestwistedinternetdefer.py", line 1656, in unwindGenerator
    return _cancellableInlineCallbacks(gen)
  File "C:Usersli.pinlianganaconda3libsite-packagestwistedinternetdefer.py", line 1571, in _cancellableInlineCallbacks
    _inlineCallbacks(None, g, status)
---  ---
  File "C:Usersli.pinlianganaconda3libsite-packagestwistedinternetdefer.py", line 1445, in _inlineCallbacks
    result = current_context.run(g.send, result)
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapycrawler.py", line 91, in crawl
    yield self.engine.open_spider(self.spider, start_requests)
pymongo.errors.AutoReconnect: connection closed

2021-10-15 14:19:59 [twisted] CRITICAL: 
Traceback (most recent call last):
  File "C:Usersli.pinlianganaconda3libsite-packagestwistedinternetdefer.py", line 1445, in _inlineCallbacks
    result = current_context.run(g.send, result)
  File "C:Usersli.pinlianganaconda3libsite-packagesscrapycrawler.py", line 91, in crawl
    yield self.engine.open_spider(self.spider, start_requests)
pymongo.errors.AutoReconnect: connection closed

Process finished with exit code 1

网上，众说纷纭，但是我本地是因为 mongodb 里面的数据的问题导致的。