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From "Alexandre Demeyer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (NUTCH-2075) Generate will not choose URL marker distance NULL
Date Fri, 07 Aug 2015 15:03:45 GMT
Alexandre Demeyer created NUTCH-2075:
----------------------------------------

             Summary: Generate will not choose URL marker distance NULL
                 Key: NUTCH-2075
                 URL: https://issues.apache.org/jira/browse/NUTCH-2075
             Project: Nutch
          Issue Type: Bug
          Components: generator
    Affects Versions: 2.3
         Environment: Using HBase as back-end Storage
            Reporter: Alexandre Demeyer
            Priority: Minor


It appears that there is a bug about certain links where nutch erases all markers and not
only the inject, generate, fetch, parse, update markers but also the distance marker.

For that reason, Nutch Generator doesn't check the validity of the marker distance (check
if it's null) and keep wrong links (without the distance marker) in the GeneratorMapper.

I think it's in relation with the problem mention here : [NUTCH-1930|https://issues.apache.org/jira/browse/NUTCH-1930].

This doesn't solved the problem which is all markers are erased (without any reasons apparently
..).

In order to find a solution about stopping crawl with problematics URL, I proposed this solution
which is simply to avoid the URL when the distance marker is NULL.

Example of links where the problem appears (put an http.content.limit highter than the content-length
PDF) :
http://www.annales.org/archives/x/marchal2.pdf



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