[NUTCH-824] Crawling - File Error 404 when fetching file with an hexadecimal character in the file name.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 1.2, 1.3, nutchgora
• Fix Version/s: 1.0.0, 1.3, nutchgora
• Component/s: fetcher

Environment

Linux nube 2.6.31-20-server #58-Ubuntu SMP x86_64 GNU/Linux

• Assignee: Julien Nioche
• Reporter: Michela Becchi
• Created: 20/May/10 20:26
• Updated: 25/Jun/11 12:53
• Resolved: 07/Jan/11 17:18

Description

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:

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

1. 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)$

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

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

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

1. accept everything else
   +.*
   ~

—

Thanks,

Michela