[jira] [Updated] (NUTCH-1732) IndexerMapReduce to delete explicitly not indexable documents

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

     [ https://issues.apache.org/jira/browse/NUTCH-1732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Jelsma updated NUTCH-1732:
---------------------------------

    Priority: Critical  (was: Major)

> IndexerMapReduce to delete explicitly not indexable documents
> -------------------------------------------------------------
>
>                 Key: NUTCH-1732
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1732
>             Project: Nutch
>          Issue Type: Bug
>          Components: indexer
>    Affects Versions: 1.8
>            Reporter: Sebastian Nagel
>            Priority: Critical
>             Fix For: 1.9
>
>
> In a continuous crawl a previously successfully indexed document (identified by a URL) can become "not indexable" for a couple of reasons and must then explicitly deleted from the index. Some cases are handled in IndexerMapReduce (duplicates, gone documents or redirects, cf. NUTCH-1139) but others are not:
> * failed to parse (but previously successfully parsed): e.g., the document became larger and is now truncated
> * rejected by indexing filter (but previously accepted)
> In both cases (maybe there are more) the document should be explicitly deleted (if {{-deleteGone}} is set). Note that this cannot be done in CleaningJob because data from segments is required. 
> We should also update/add a description for {{-deleteGone}}: it does not only trigger deletion of gone documents but also of redirects and duplicates (and unparseable and skipped docs).



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