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https://issues.apache.org/jira/browse/NUTCH-1932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14746004#comment-14746004
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Sebastian Nagel commented on NUTCH-1932:
----------------------------------------

Hi Markus, understood.
- didn't we have the problem recently on the user mailing list that documents 
have to be removed first from the indexer than from CrawlDb? With duplicates? 
Maybe a more generic solution could be better for the future. Taking care of 
the correct order of deletions should not be the responsibility of a plugin.
- attached some additional changes (Javadoc, ant eclipse target)

> Automatically remove orphaned pages
> -----------------------------------
>
>                 Key: NUTCH-1932
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1932
>             Project: Nutch
>          Issue Type: New Feature
>            Reporter: Markus Jelsma
>            Assignee: Markus Jelsma
>            Priority: Minor
>         Attachments: NUTCH-1932-add.patch, NUTCH-1932.patch, 
> NUTCH-1932.patch, NUTCH-1932.patch, NUTCH-1932.patch, NUTCH-1932.patch, 
> NUTCH-1932.patch, NUTCH-1932.patch
>
>
> Orphan scoring filter that determines whether a page has become orphaned, 
> e.g. it has no more other pages linking to it. If a page hasn't been linked 
> to after markGoneAfter seconds, the page is marked as gone and is then 
> removed by an indexer.  If a page hasn't been linked to after markOrphanAfter 
> seconds, the page is removed from the CrawlDB.



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