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From "Michela Becchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (NUTCH-824) Crawling - File Error 404 when fetching file with an hexadecimal character in the file name.
Date Thu, 20 May 2010 20:27:18 GMT
Crawling - File Error 404 when fetching file with an hexadecimal character in the file name.
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                 Key: NUTCH-824
                 URL: https://issues.apache.org/jira/browse/NUTCH-824
             Project: Nutch
          Issue Type: Bug
          Components: fetcher
    Affects Versions: 1.0.0
         Environment: Linux nube 2.6.31-20-server #58-Ubuntu SMP x86_64 GNU/Linux
            Reporter: Michela Becchi
            Priority: Blocker


Hello,

I am performing a local file system crawling.
My problem is the following: all files that contain some hexadecimal characters in the name
do not get crawled.

For example, I will see the following error:

fetching file:/nutch-1.0/wikidump/wiki-en/en/articles/a/2E/m/A.M._%28album%29_8a09.html
org.apache.nutch.protocol.file.FileError: File Error: 404
        at org.apache.nutch.protocol.file.File.getProtocolOutput(File.java:92)
        at org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:535)
fetch of file:/nutch-1.0/wikidump/wiki-en/en/articles/a/2E/m/A.M._%28album%29_8a09.html failed
with: org.apache.nutch.protocol.file.FileError: File Error: 404

I am using nutch-1.0.

Among other standard settings, I configured nutch-site.conf as follows:

<property>
  <name>plugin.includes</name>
  <value>protocol-file|protocol-http|urlfilter-regex|parse-(text|html|js|pdf)|index-(basic|anchor)|query-(basic|site|url)|response-(json|xml)|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>

<property>
  <name>file.content.limit</name>
  <value>-1</value>
</property>

Moreover, crawl-urlfilter.txt   looks like:

# skip http:, ftp:, & mailto: urls
-^(http|ftp|mailto):

# skip image and other suffixes we can't yet parse
-\.(gif|GIF|jpg|JPG|png|PNG|ico|ICO|css|sit|eps|wmf|zip|ppt|mpg|xls|gz|rpm|tgz|mov|MOV|exe|jpeg|JPEG|bmp|BMP)$

# skip URLs containing certain characters as probable queries, etc.
-[?*!@=]

# skip URLs with slash-delimited segment that repeats 3+ times, to break loops
-.*(/[^/]+)/[^/]+\1/[^/]+\1/

# accept hosts in MY.DOMAIN.NAME
#+^http://([a-z0-9]*\.)*MY.DOMAIN.NAME/

# accept everything else
+.*
~    

---

Thanks,

Michela


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