nutch 采集到的数据与实际不符

现象，这个网站我总计能抽取将近500个URL，但实际只抽取了100条

解析：nutch默认从一个页面解析出的链接，只取前 100 个。 

<property>
  <name>db.max.outlinks.per.page</name>
  <value>100</value>
  <description>The maximum number of outlinks that we'll process for a page.
  If this value is nonnegative (>=0), at most db.max.outlinks.per.page outlinks
  will be processed for a page; otherwise, all outlinks will be processed.
  </description>
</property>

将这个值改大一些 1000 .