Solr is highlighting wrong words

Question

I have a document which is

{'remaining': 'planet holly wood las vegas','id': 'c6d8e7e5-7ba9-4b68-ae0b-bb31ec4872f3'}

my query is remaining:(((mirage OR *holly* OR (planet AND hollywood)) AND (las AND vegas)) AND id:c6d8e7e5-7ba9-4b68-ae0b-bb31ec4872f3)

in the highlighting result:

{'c6d8e7e5-7ba9-4b68-ae0b-bb31ec4872f3': {'remaining': ['<em>planet</em> <em>holly</em> wood <em>las</em> <em>vegas</em>']}}

Why is planet being highlighted? I'm using solr 8.4 Thanks.

Answer 1

It's being highlighted because it's part of your query.

In general highlighting works across all the tokens being matched by the query, not just those giving a hit (and by default, a hit isn't even necessary in the field you're highlighting on - just that the token from the query is present in the highlighted value).

You can tweak this slightly by using hl.requireFieldMatch , but I'm not sure if that'll work with the optional clauses in your OR statement.

hl.requireFieldMatch

By default, false, all query terms will be highlighted for each field to be highlighted (hl.fl) no matter what fields the parsed query refer to. If set to true, only query terms aligning with the field being highlighted will in turn be highlighted.

The full list of highlighting options is available in the reference guide .