Nutch 爬行不工作

Question

我想使用 Apache Nutch 1.12 抓取网站并将数据索引到 Apache Solr。我关注了这个tutorial。

我的seed.txt 文件有这个网址http://nutch.apache.org/

在我的正则表达式 url 过滤器中，我有这样的 +^http://([a-z0-9]*.)*nutch.apache.org/

当我尝试获取数据时，我只获得了我的 seed.txt 文件中的 url。

Fetcher: starting at 2017-01-03 09:56:23
Fetcher: segment: crawl/segments/20170103095613
Fetcher: threads: 10
Fetcher: time-out divisor: 2
QueueFeeder finished: total 2 records + hit by time limit :0
Using queue mode : byHost
Using queue mode : byHost
Using queue mode : byHost
fetching http://nutch.apache.org/ (queue crawl delay=5000ms)
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Using queue mode : byHost
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
Fetcher: throughput threshold: -1
Fetcher: throughput threshold retries: 5
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=2
robots.txt whitelist not configured.
robots.txt whitelist not configured.
-activeThreads=2, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=2
Thread FetcherThread has no more work available
Thread FetcherThread has no more work available
-finishing thread FetcherThread, activeThreads=1
-finishing thread FetcherThread, activeThreads=0
-activeThreads=0, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=0
-activeThreads=0

我在这里缺少什么。

Answer 1

我尝试再执行一次获取操作，但得到了预期的结果。