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  2008年7月10日
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 @ 2008-07-10 11:38 自己的小屋 阅读(2324) | 评论 (0)编辑 收藏
Nutch0.9 Crawl在Run的时候,有时候会出现 -


java.lang.ArrayIndexOutOfBoundsException: -1

at org.apache.lucene.index.MultiReader.isDeleted(MultiReader.java:
113)

at org.apache.nutch.indexer.DeleteDuplicates$InputFormat$DDRecordReader.next(DeleteDuplicates.java:
176)

at org.apache.hadoop.mapred.MapTask$
1.next(MapTask.java:157)

at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:
46)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:
175)

at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:
126)

Exception in thread 
"main" java.io.IOException: Job failed!

at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:
604)

at org.apache.nutch.indexer.DeleteDuplicates.dedup(DeleteDuplicates.java:
439)

at org.apache.nutch.crawl.Crawl.main(Crawl.java:
135)

问题的解决方法:

https://issues.apache.org/jira/browse/NUTCH-525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12515955



posted @ 2008-07-10 11:32 自己的小屋 阅读(603) | 评论 (0)编辑 收藏