我在Run Nutch的时候出现这样的错误 -
08/07/07 04:05:41 INFO conf.Configuration: found resource crawl-urlfilter.txt at file:/home/hut/installfiles/nutch-0.9/out/production/nutch-0.9/crawl-urlfilter.txt
08/07/07 04:05:41 INFO conf.Configuration: found resource parse-plugins.xml at file:/home/hut/installfiles/nutch-0.9/out/production/nutch-0.9/parse-plugins.xml
08/07/07 04:05:41 INFO fetcher.Fetcher: fetching http://www.yale.edu/
08/07/07 04:05:41 INFO fetcher.Fetcher: fetching http://www.harvard.edu/
08/07/07 04:05:41 INFO fetcher.Fetcher: fetch of http://www.harvard.edu/ failed with: org.apache.nutch.protocol.ProtocolNotFound: protocol not found for url=http
08/07/07 04:05:41 INFO fetcher.Fetcher: fetch of http://www.yale.edu/ failed with: org.apache.nutch.protocol.ProtocolNotFound: protocol not found for url=http
解决方法：nutch-site.xml
<property>
<name>plugin.includes</name>
<value>
nutch-extensionpoints|protocol-http|urlfilter-regex|parse-(text|html|js)|index-basic|query-(basic|site|url)|summary-basic|scoring-opic|urlnormalizer-(pass|regex|basic)
</value>
<description>Regular expression naming plugin directory names to
include. Any plugin not matching this expression is excluded.
In any case you need at least include the nutch-extensionpoints plugin. By
default Nutch includes crawling just HTML and plain text via HTTP,
and basic indexing and search plugins. In order to use HTTPS please enable
protocol-httpclient, but be aware of possible intermittent problems with the
underlying commons-httpclient library.
</description>
</property>
nutch-extensionpoints|被我错误的删除了,还原以后一切工作正常. 默认情况下nutch0.9的目录结构中并没有plugin.includes这个properties, 它会载入nutch-default.xml里面的plugin.includes所以定义的所有的plugin. 在nutch-site.xml编辑/加入 plugin.includes properties的目的是为了加入我们自己的plugin而覆盖nutch-default.xml定义的.
posted on 2008-07-10 11:38
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