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https://issues.apache.org/jira/browse/NUTCH-963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12987574#action_12987574
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Julien Nioche commented on NUTCH-963:
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It would be nice to couple that with the deduplication for SOLR as well. The
current mechanism is not great : it pulls ALL the documents from SOLR, finds
the duplicates then issues a delete command. It would be more efficient to find
the duplicates with a mapreduce on the crawldb then send the deletions to SOLR.
We could also delete the urls which are definitly gone at the same time
> Add support for deleting Solr documents with STATUS_DB_GONE in CrawlDB (404
> urls)
> ---------------------------------------------------------------------------------
>
> Key: NUTCH-963
> URL: https://issues.apache.org/jira/browse/NUTCH-963
> Project: Nutch
> Issue Type: New Feature
> Components: indexer
> Affects Versions: 2.0
> Reporter: Claudio Martella
> Assignee: Markus Jelsma
> Priority: Minor
> Fix For: 1.3, 2.0
>
> Attachments: Solr404Deleter.java
>
>
> When issuing recrawls it can happen that certain urls have expired (i.e. URLs
> that don't exist anymore and return 404).
> This patch creates a new command in the indexer that scans the crawldb
> looking for these urls and issues delete commands to SOLR.
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