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https://issues.apache.org/jira/browse/NUTCH-2567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebastian Nagel reassigned NUTCH-2567:
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Assignee: Sebastian Nagel
> parse-metatags writes all meta tags twice
> -----------------------------------------
>
> Key: NUTCH-2567
> URL: https://issues.apache.org/jira/browse/NUTCH-2567
> Project: Nutch
> Issue Type: Bug
> Reporter: Gerard Bouchar
> Assignee: Sebastian Nagel
> Priority: Major
> Fix For: 1.17
>
>
> Using nutch witch the following configuration, MetaTagsParser writes HTML
> meta tags to the metadata twice:
> {code:java}
> <property>
> <name>plugin.includes</name>
> <value>protocol-http|parse-(tika|metatags)</value>
> </property>
> {code}
> The problem seems to come from
> [MetaTagsParser.java#L104-L111|https://github.com/apache/nutch/blob/929fc9c89afb9267e3116cdca874dbcf9e511430/src/plugin/parse-metatags/src/java/org/apache/nutch/parse/metatags/MetaTagsParser.java#L104-L111]
> :
> Both the meta tags from the existing ParseResult and from the HTMLMetaTags
> are added to the metadata with a "metatag." prefix. But the ParseResult
> object already contains the HTML meta tags, because they have been added by
> TikaParser here:
> [TikaParser.java#L198-L206|https://github.com/apache/nutch/blob/929fc9c89afb9267e3116cdca874dbcf9e511430/src/plugin/parse-tika/src/java/org/apache/nutch/parse/tika/TikaParser.java#L198-L206]
>
> This bug is concerning, because it makes the segments uselessly big,
> especially if we want to store all metatags (by default, only
> metatag.description and metatag.keywords are stored, and thus duplicated).
> I would also suggest making the output of
> [Metadata::toString|https://github.com/apache/nutch/blob/3e2d3d456489bf52bc586dae0e2e71fb7aad8fe7/src/java/org/apache/nutch/metadata/Metadata.java#L235-L245]
> more readable(for instance by adding a newline before each new metadata
> value). It would have made this bug way easier to spot inside the output of
> the parsechecker.
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