Gerard Bouchar created NUTCH-2567:
-------------------------------------
Summary: parse-metatags writes every meta tags twice
Key: NUTCH-2567
URL: https://issues.apache.org/jira/browse/NUTCH-2567
Project: Nutch
Issue Type: Bug
Reporter: Gerard Bouchar
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/master/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/master/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).
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