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The following page has been changed by pannous:
http://wiki.apache.org/nutch/solved_problems

New page:
Problem(Exception)/Solution pairs

P:Not a known field name:DEFAULT
S: Add plugin
    <property>
    <name>plugin.includes</name>
    <value>query-basic|.....
in hadoop-default.xml

P: [null] MalformedUrlException
S: add 

P: java.lang.ClassCastException: org.apache.hadoop.io.Text
S: wrong hadoop version / patch http://files.pannous.de/org.rar

P:java.lang.NoSuchMethodError: org.apache.hadoop.io.MapFile $Writer.
S: wrong hadoop version / patch http://files.pannous.de/org.rar

P: NullPointerException when crawling :
S:  <property>
        <name>http.agent.name</name>
        <value>NutchCVS</value>
        <description>Our HTTP 'User-Agent' request header.</description>
    </property>

P: java.io.IOException: config()
S: ignore it ! ;)

P: nutch crawl ...   Job Failed!
S: manifold. set log4j.properties debug level !
log4j.rootLogger=ALL, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender

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