[jira] [Assigned] (NUTCH-1052) Multiple deletes of the same URL using SolrClean

["Markus Jelsma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUTCH-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Jelsma reassigned NUTCH-1052:
------------------------------------

    Assignee: Markus Jelsma

> Multiple deletes of the same URL using SolrClean
> ------------------------------------------------
>
>                 Key: NUTCH-1052
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1052
>             Project: Nutch
>          Issue Type: Improvement
>          Components: indexer
>    Affects Versions: 1.3, 1.4
>            Reporter: Tim Pease
>            Assignee: Markus Jelsma
>            Priority: Minor
>             Fix For: 1.4, 2.0
>
>         Attachments: NUTCH-1052-1.4-1.patch
>
>
> The SolrClean class does not keep track of purged URLs, it only checks the URL status for "db_gone". When run multiple times the same list of URLs will be deleted from Solr. For small, stable crawl databases this is not a problem. For larger crawls this could be an issue. SolrClean will become an expensive operation.
> One solution is to add a "purged" flag in the CrawlDatum metadata. SolrClean would then check this flag in addition to the "db_gone" status before adding the URL to the delete list.
> Another solution is to add a new state to the status field "db_gone_and_purged".
> Either way, the crawl DB will need to be updated after the Solr delete has successfully occurred.

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