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 Post subject: Hibernate Search: Fielddata is disabled on text fields
PostPosted: Mon Dec 04, 2017 8:03 am 
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Joined: Mon Dec 04, 2017 7:44 am
Posts: 1
Hi,

I attempted upgrade from Hibernate Search 5.8.0.CR1 to 5.8.2.Final
and from ElasticSearch 2.4.2 to 5.6.4.

When I run my application I'm getting the following error:

Code:
Status: 400 Bad Request
Error message: {"root_cause":[{"type":"illegal_argument_exception",
reason":"Fielddata is disabled on text fields by default.
Set fielddata=true on [title] in order to load fielddata in memory by uninverting the inverted index.
Note that this can however use significant memory. Alternatively use a keyword field instead."}]


I read about Fielddata here:
https://www.elastic.co/guide/en/elasticsearch/reference/5.6/fielddata.html#_fielddata_is_disabled_on_literal_text_literal_fields_by_default
But I'm not sure how to address this issue, especially from Hibernate Search.

My title field definition looks like this:

Code:
@Field(name = "title", analyzer = @Analyzer(definition = "my_collation_analyzer"))
@Field(name = "title_polish", analyzer = @Analyzer(definition = "polish"))
protected String title;

I'm using the following analyzer definition:

Code:
@AnalyzerDef(name = "my_collation_analyzer",
        tokenizer = @TokenizerDef(factory = KeywordTokenizerFactory.class), filters = { @TokenFilterDef(
                name = "polish_collation", factory = ElasticsearchTokenFilterFactory.class, params = {
                        @org.hibernate.search.annotations.Parameter(name = "type", value = "'icu_collation'"),
                        @org.hibernate.search.annotations.Parameter(name = "language", value = "'pl'") }) })


(Analyzer polish comes from plugin analysis-stempel.)


Elasticsearch notes on Fielddata recommend changing the type of the field
from text to keyword, or setting fielddata=true, but I'm not sure
how to do it using Hibernate Search annotations because there are no such
properties in annotation @Field.


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