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Posted to issues@lucene.apache.org by "Profimedia (Jira)" <ji...@apache.org> on 2019/10/09 16:42:00 UTC
[jira] [Created] (SOLR-13832) MoreLikeThis parsers SimpleMLTQParser
and CloudMLTQParser - termvectors vs fieldvalues
Profimedia created SOLR-13832:
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Summary: MoreLikeThis parsers SimpleMLTQParser and CloudMLTQParser - termvectors vs fieldvalues
Key: SOLR-13832
URL: https://issues.apache.org/jira/browse/SOLR-13832
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: MoreLikeThis
Affects Versions: 7.7.2
Reporter: Profimedia
It seems SimpleMLTQParser and CloudMLTQParser have one big difference.
SimpleMLTQParser uses term vectors of original item for searching more like this items, but CloudMLTQParser uses field values for this searching.
It means that if you don't have *stored* all values for the specified fields, then you search only by fields values from the stored fields. And this is a big problem. It's a breaking change for easy transfer from Solr standalone to Solr Cloud.
It would be better to have some mlt param to set up, if data should be read from field stored values or from the terms values.
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