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据我了解，基本示例应该能够抓取和获取页面。

我按照http://stormcrawler.net/getting-started/上的示例进行操作，但爬虫似乎只获取了几页，然后什么也不做。

我想爬取http://books.toscrape.com/并运行爬取，但在日志中看到只获取了第一页，而发现了其他一些页面但未获取：

8010 [Thread-34-parse-executor[5 5]] INFO  c.d.s.b.JSoupParserBolt - Parsing : starting http://books.toscrape.com/
8214 [Thread-34-parse-executor[5 5]] INFO  c.d.s.b.JSoupParserBolt - Parsed http://books.toscrape.com/ in 182 msec
content 1435 chars
url     http://books.toscrape.com/
domain  toscrape.com
description
title   All products | Books to Scrape - Sandbox
http://books.toscrape.com/catalogue/category/books/new-adult_20/index.html      DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1

http://books.toscrape.com/catalogue/the-dirty-little-secrets-of-getting-your-dream-job_994/index.html   DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1

http://books.toscrape.com/catalogue/category/books/thriller_37/index.html       DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1

http://books.toscrape.com/catalogue/category/books/academic_40/index.html       DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1

http://books.toscrape.com/catalogue/category/books/classics_6/index.html        DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1

http://books.toscrape.com/catalogue/category/books/paranormal_24/index.html     DISCOVERED      Thu Apr 05 13:46:01 CEST 2018
        url.path: http://books.toscrape.com/
        depth: 1



....




17131 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      6:partitioner URLPartitioner           {}
17164 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      8:spout       queue_size               0
17403 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      5:parse       JSoupParserBolt          {tuple_success=1, outlink_kept=73}
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     num_queues               0
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     fetcher_average_perdoc   {time_in_queues=265.0, bytes_fetched=51294.0, fetch_time=52.0}
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     fetcher_counter          {robots.fetched=1, bytes_fetched=51294, fetched=1}
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     activethreads            0
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     fetcher_average_persec   {bytes_fetched_perSec=5295.137813564571, fetched_perSec=0.10323113451016827}
17693 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928770        172.18.25.22:1024      3:fetcher     in_queues                0
27127 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      6:partitioner URLPartitioner           {}
27168 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      8:spout       queue_size               0
27405 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      5:parse       JSoupParserBolt          {tuple_success=0, outlink_kept=0}
27695 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      3:fetcher     num_queues               0
27695 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      3:fetcher     fetcher_average_perdoc   {}
27695 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      3:fetcher     fetcher_counter          {robots.fetched=0, bytes_fetched=0, fetched=0}
27695 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      3:fetcher     activethreads            0
27696 [Thread-39] INFO  o.a.s.m.LoggingMetricsConsumer - 1522928780        172.18.25.22:1024      3:fetcher     fetcher_average_persec   {bytes_fetched_perSec=0.0, fetched_perSec=0.0}

没有更改任何配置文件。包括 crawler-conf.yaml。该标志parser.emitOutlinks也应该为真，因为这是 crawler-default.yaml 的默认值

在另一个项目中，我还关注了有关弹性搜索的 youtube 教程。在这里，我还遇到了根本没有页面被提取和索引的问题。

爬虫没有获取任何页面的错误可能在哪里？

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1 回答 1

0

人工制品生成的拓扑只是一个示例，它使用 StdOutStatusUpdater，它只是将发现的 URL 转储到控制台。如果您在本地模式下运行或与单个工作人员一起运行，则可以使用 MemoryStatusUpdater，因为它会将发现的 URL 添加到 MemorySpout 并且将依次处理这些。

请注意，当您终止拓扑或拓扑崩溃时，这不会保留有关 URL 的信息。同样，这仅用于调试，并作为 StormCrawler 的初始步骤。

如果您希望 URL 被持久化，您可以使用任何持久化后端（SOLR/Elasticsearch、SQL）。随意将您的 ES 问题描述为一个单独的问题。

于 2018-04-05T12:31:54.277 回答