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https://issues.apache.org/jira/browse/NUTCH-1037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13063337#comment-13063337
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Markus Jelsma commented on NUTCH-1037:
--------------------------------------

Wrong patches, in these i somehow omitted the negation operator in the 
condition. Add it. This fix is then confirmed to work in large environments.

> Deduplicate anchors before indexing
> -----------------------------------
>
>                 Key: NUTCH-1037
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1037
>             Project: Nutch
>          Issue Type: Improvement
>            Reporter: Markus Jelsma
>            Assignee: Markus Jelsma
>             Fix For: 1.4, 2.0
>
>         Attachments: NUTCH-1037-1.4-1.patch, NUTCH-1037-2.0-1.patch
>
>
> Anchors are not deduplicated before indexing. This can result in a very high 
> number of similar and identical anchors being indexed. Before indexing, 
> anchors must be deduplicated at least on case.
> Should this be implemented as a fix or as a new feature that needs to be 
> configured?

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