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https://issues.apache.org/jira/browse/NUTCH-2456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16244761#comment-16244761
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Markus Jelsma commented on NUTCH-2456:
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What will this patch achieve then? Just the case of ignoring dbDatum i presume?
If have a hard time reading githubs output here, my problem.
How about index.*.md? What will happen if someone has both index.parse.md and
index.db.md enabled? Will it end up with duplicates, fields not configured to
be multivalued? If so, that would need a new issue for that.
The problem of duplicates and orphans is obvious. But that can be remedied by
never having those eligible for fetch via a custom (or built-in) FetchSchedule.
To be clear, i am really for having this feature as it will reduce cycle time
by a lot for large CrawlDBs, especially if you start indexing in parallel when
updatedb is due.
> Allow to index pages/URLs not contained in CrawlDb
> --------------------------------------------------
>
> Key: NUTCH-2456
> URL: https://issues.apache.org/jira/browse/NUTCH-2456
> Project: Nutch
> Issue Type: Bug
> Components: indexer
> Affects Versions: 1.13
> Reporter: Yossi Tamari
> Priority: Critical
>
> If http.redirect.max is set to a positive value, the Fetcher will follow
> redirects, creating a new CrawlDatum.
> If the redirected URL is fetched and parsed, during indexing for it we have a
> special case: dbDatum is null. This means that in
> [https://github.com/apache/nutch/blob/6199492f5e1e8811022257c88dbf63f1e1c739d0/src/java/org/apache/nutch/indexer/IndexerMapReduce.java#L259]
> the document is not indexed, as it is assumed it only has inlinks (actually
> it has everything but dbDatum).
> I'm not sure what the correct fix is here. It seems to me the condition
> should use AND instead of OR anyway, but I may not understand the original
> intent. It is clear that it is too strict as is.
> However, the code following that line assumes all 4 objects are not null, so
> a patch would need to change more than just the condition.
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