有朋友遇到这个错么？下边是日志信息，看起来像是下载超时，但是都给DOWNLOAD_DELAY设置为3了
2018-12-13 09:24:24 [scrapy.utils.log] INFO: Scrapy 1.5.1 started (bot: douban)
2018-12-13 09:24:24 [scrapy.utils.log] INFO: Versions: lxml 4.2.5.0, libxml2 2.9.8, cssselect 1.0.3, parsel 1.5.1, w3lib 1.19.0, Twisted 18.9.0, Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) - [Clang 6.0 (clang-600.0.57)], pyOpenSSL 18.0.0 (OpenSSL 1.1.0j 20 Nov 2018), cryptography 2.4.2, Platform Darwin-18.2.0-x86_64-i386-64bit
2018-12-13 09:24:24 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'douban', 'DOWNLOAD_DELAY': 3, 'NEWSPIDER_MODULE': 'douban.spiders', 'SPIDER_MODULES': ['douban.spiders'], 'USER_AGENT': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36'}
2018-12-13 09:24:24 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.memusage.MemoryUsage',
'scrapy.extensions.logstats.LogStats']
2018-12-13 09:24:24 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
'scrapy.downloadermiddlewares.retry.RetryMiddleware',
'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
'scrapy.downloadermiddlewares.stats.DownloaderStats']
2018-12-13 09:24:24 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
'scrapy.spidermiddlewares.referer.RefererMiddleware',
'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
'scrapy.spidermiddlewares.depth.DepthMiddleware']
2018-12-13 09:24:24 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2018-12-13 09:24:24 [scrapy.core.engine] INFO: Spider opened
2018-12-13 09:24:24 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2018-12-13 09:24:24 [scrapy.extensions.telnet] DEBUG: Telnet console listening on 127.0.0.1:6023
2018-12-13 09:24:25 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://movie.douban.com/top250> (referer: None)
2018-12-13 09:24:25 [scrapy.core.engine] INFO: Closing spider (finished)
{'serial_number': '25'}
2018-12-13 09:24:25 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 308,
'downloader/request_count': 1,
'downloader/request_method_count/GET': 1,
'downloader/response_bytes': 12937,
'downloader/response_count': 1,
'downloader/response_status_count/200': 1,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2018, 12, 13, 1, 24, 25, 336267),
'log_count/DEBUG': 2,
'log_count/INFO': 7,
'memusage/max': 49029120,
'memusage/startup': 49029120,
'response_received_count': 1,
'scheduler/dequeued': 1,
'scheduler/dequeued/memory': 1,
'scheduler/enqueued': 1,
'scheduler/enqueued/memory': 1,
'start_time': datetime.datetime(2018, 12, 13, 1, 24, 24, 891291)}
2018-12-13 09:24:25 [scrapy.core.engine] INFO: Spider closed (finished)
Process finished with exit code 0
