[jira] Closed: (NUTCH-336) Harvested links shouldn't get db.score.injected in addition to inbound contributions

["Andrzej Bialecki (JIRA)" <ji...@apache.org>]

     [ http://issues.apache.org/jira/browse/NUTCH-336?page=all ]

Andrzej Bialecki  closed NUTCH-336.
-----------------------------------

    Fix Version/s: 0.8.1
                   0.9.0
       Resolution: Fixed

Patch applied to branch-0.8 and trunk. Thanks!

> Harvested links shouldn't get db.score.injected in addition to inbound contributions
> ------------------------------------------------------------------------------------
>
>                 Key: NUTCH-336
>                 URL: http://issues.apache.org/jira/browse/NUTCH-336
>             Project: Nutch
>          Issue Type: Bug
>          Components: fetcher
>    Affects Versions: 0.8
>            Reporter: Chris Schneider
>            Priority: Critical
>             Fix For: 0.8.1, 0.9.0
>
>         Attachments: NUTCH-336.patch.txt
>
>
> Currently (even with Stefan's fix for NUTCH-324), harvested links have their initial scores set to db.score.injected + (sum of inbound contributions * db.score.link.[internal | external]), but this will place (at least external) harvested links even higher than injected URLs on the fetch list. Perhaps more importantly, this effect cascades.
> As a simple example, if each page in A->B->C->D has exactly one external link and only A is injected, then D will receive an initial score of at least (4*db.score.injected) with the default db.score.link.external of 1.0. Higher values of db.score.injected and db.score.link.external obviously exacerbate this problem.

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